Public Input No. 140-NFPA 79-2016 [ Global Input ] · PDF filePublic Input No. 140-NFPA 79-2016 [ Global Input ] ... International Electrotechnical Commission, 3, ... IEC 60072–2,

Public Input No. 140-NFPA 79-2016 [ Global Input ]

Type your content here ...globably change "cableless" to "wireless"

9.2.5.1.2

9.2.7

9.2.7.1

9.2.7.2

9.2.7.3.1

9.2.7.3.1(2)

9.2.7.3.1(4)

9.2.7.3.2

9.2.7.3.2(2)

A.3.3.14 ,multiple but has separate PI

Annex B, item 25

Statement of Problem and Substantiation for Public Input

Wireless is a more commonly used term. Commercially available products described this way are used for industrial machinery control and status indication. The standard should be consistent with the products used.

Submitter Information Verification

Submitter Full Name: Paul Dobrowsky

Organization: Innovative Technology Services

Street Address:

City:

State:

Zip:

Submittal Date: Wed Jan 06 13:19:38 EST 2016

Committee Statement

Resolution: The term cableless is consistent with IEC 60204-1. Annex A.3.3.14 clarifies all cableless devices asusing wireless technologies while not all wireless devices are cableless.

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

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Revise the standard to make consistent the use of subplate, sub-plate, subpanel, and sub-panel. Ifthese terms are intended to be different, a definition of subpanel is required.


There is ambiguity between the use to subplate and subpanel which would be eliminated by the proposed change.


Submitter Full Name: ROBERT GRUENDEL

Organization: DEMATIC

Street Address:

City:

State:

Zip:

Submittal Date: Fri Dec 25 13:58:59 EST 2015

Committee Statement

Resolution: FR-1-NFPA 79-2016

Statement: The term "subpanel" is used only once in the definition of "Industrial Control Panel." Adding the term"subpanel" in parenthesis to the definition of subplate provides correlation with the use of the term"subpanel" in the definition of "industrial Control Panel". The term "sub-panel" is used only once inAnnex D and does not require any revision as it is used in an example of a bill of materials entry. Theterm sub-plate was not found in the standard.


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Harmonize the use of "clearly visible" and "plainly visible" by eliminating the use of "plainlyvisible". If the use of these terms is intented to denote different degrees of visibility, a definition isneeded for both terms.


The ambiguity of the term clearly visible and plainly visible would be eliminated by the proposed change.




Street Address:

City:

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Committee Statement


Statement: The only instance of “clearly visible” in the standard occurs in 16.2.3.1. Changing “clearly visible” to“plainly visible” in this clause facilitates consistent use of the term “plainly visible” in the standard.


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Public Input No. 108-NFPA 79-2016 [ Section No. 1.1.1 ]

1.1.1

The provisions of this standard shall apply to the electrical/electronic equipment, apparatus, or systems ofindustrial machines operating from a nominal voltage of 600 volts 1000 volts or less, and commencing atthe point of connection of the supply circuit conductors to the electrical equipment of the machine.


The proposed change aligns with the change in the 2014 NEC where the voltage range for low voltage equipment has been increased to 1000V.


Submitter Full Name: Jay Tamblingson

Organization: Rockwell Automation

Street Address:

City:

State:

Zip:

Submittal Date: Mon Jan 04 14:51:27 EST 2016

Committee Statement


Statement: The proposed change aligns with the change in the 2014 NEC where the voltage range for lowvoltage equipment has been increased to 1000V. Also a TG needs to be formed to review all otherlocations in the document where 600 V limit appears.and determine if a revision is required.

Sections that contain reference to 600 volts are 1.1.1, 3.3.106, 7.2.10.2, 7.9 11.5 and Table 11.5.1.1.


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1.1.1

The provisions of this standard shall apply to the electrical/electronic equipment, apparatus, or systems ofindustrial machines operating from a nominal voltage of 600 volts 1000 volts or less, and commencing atthe point of connection of the supply circuit conductors to the electrical equipment of the machine.


The NEC has changed to 1000 Volts in many locations and making the change in NFPA 79 will be more consistent.




Street Address:

City:

State:

Zip:


Committee Statement


Statement: The proposed change aligns with the change in the 2014 NEC where the voltage range for lowvoltage equipment has been increased to 1000V. Also a TG needs to be formed to review all otherlocations in the document where 600 V limit appears.and determine if a revision is required.

Sections that contain reference to 600 volts are 1.1.1, 3.3.106, 7.2.10.2, 7.9 11.5 and Table 11.5.1.1.


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Public Input No. 1-NFPA 79-2015 [ Chapter 2 ]

Chapter 2 Referenced Publications

2.1 General.

The documents or portions thereof listed in this chapter are referenced within this standard and shall beconsidered part of the requirements of this document.

2.2 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 70® , National Electrical Code®, 2014 edition.

NFPA 70E® , Standard for Electrical Safety in the Workplace®, 2015 edition.

2.3 Other Publications.

2.3.1 ANSI Publications.

American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY 10036.

ANSI Z535.4, Product Safety Signs and Labels, 2007 2011 .

2.3.2 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P. O. Box C700, West Conshohocken, PA 19428-2959.

ASTM B 8 B8 , Standard Specification for Concentric-Lay–Stranded Copper Conductors, Hard,Medium-Hard, or Soft, 2004 2011 .

ASTM B 174 B174 , Standard Specification for Bunch-Stranded Copper Conductors for ElectricalConductors, 2002 2010, reapproved 2015 .

ASTM B 286 B286 , Standard Specification for Copper Conductors for Use in Hookup Wire for ElectronicEquipment, 2002 2007, reapproved 2012 .

2.3.3 IEC Publications.

International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20,Switzerland.

IEC 60072–1, Dimensions and output series for rotating electrical machines — Part 1: Frame numbers 56to 400 and flange numbers 55 to 1080, 1991-03 .

IEC 60072–2, Dimensions and output series for rotating electrical machines — Part 2: Frame numbers 355to 1000 and flange numbers 1180 to 2360, 1990-12 .

2.3.4 IEEE Publications.

IEEE, Three Park Avenue, 17th Floor, New York, NY 10016-5997.

IEEE 315/315A , Graphical Symbols for Electrical and Electronics Diagrams (Including ReferenceDesignation Letters), 1993.

2.3.5 NEMA Publications.

National Electrical Manufacturers Association, 1300 North 17th Street, Suite 1847 900 , RosslynArlington , VA 22209.

NEMA ICS 2, Industrial Control and Systems: Controllers, Contactors, and Overload Relays Rated600 Volts, 2000, Revised 2004 Errara, 2008 .

NEMA MG - 1, Motors and Generators, 2003 2014 .

NEMA 250, Enclosures for Electrical Equipment (1000 Volts Maximum), 2003 2014 .


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2.3.6 UL Publications.

Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096.

ANSI/UL 50 UL50 , Standard for Enclosures for Electrical Equipment, 2007, revised 2012 .

ANSI/UL 50E UL50E , Standard for Electrical Equipment, Environment Considerations, 2007, revised2012 .

ANSI/UL 508 UL508 , Standard for Industrial Control Equipment, 1999, Revised 2010 2013 .

UL 508A UL508A , Standard for Industrial Control Panels, 2001, Revised 2010 2014 .

ANSI/UL 870 UL870 , Standard for Wireways, Auxiliary Gutters and Associated Fittings, 2008, revised2013 .

ANSI/UL 1063 UL1063 , Standard for Machine-Tool Wires and Cables, 2006, revised 2012 .

ANSI/UL 1581 UL1581 , Reference Standard for Electrical Wires, Cables and Flexible Cords, 2001,Revised 2011 2015 .

2.3.7 U.S. Government Publications.

U.S. Government Printing Government Publishing Office, 732 North Capitol Street, NW, Washington,DC 20402 20401-0001 .

Title 29, Code of Federal Regulations, Part 1910.331–335, “Safety-Related Work Practices.”

2.3.8 Other Publications.

Merriam-Webster’s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA, 2003.

2.4 References for Extracts in Mandatory Sections.

NFPA 70® , National Electrical Code®, 2014 edition.

NFPA 70E® , Standard for Electrical Safety in the Workplace®, 2015 edition.


Referenced current SDO names, addresses, standard names, numbers, and editions.

Related Public Inputs for This Document

Related Input Relationship

Public Input No. 2-NFPA 79-2015 [Chapter K]


Submitter Full Name: Aaron Adamczyk

Organization: [ Not Specified ]

Street Address:

City:

State:

Zip:

Submittal Date: Tue Jun 16 00:34:17 EDT 2015

Committee Statement


Statement: Referenced current SDO names, addresses, standard names, numbers, and editions.


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Public Input No. 111-NFPA 79-2016 [ New Section after 2.3.2 ]

DOE HANDBOOK -1003

GUIDE TO GOOD PRACTICES FOR TRAINING AND QUALIFICATION OF MAINTENANCEPERSONNEL


This DOE handbook gives guidance to industrial management when qualifying electrical maintenance workers to germane job tasks. It is presently used as a guide to all DOE projects and suggested by OSHA as a guide.



Public Input No. 112-NFPA 79-2016 [New Section after 3.3.75]


Submitter Full Name: David Carpenter

Organization: City Of Florence Alabama

Street Address:

City:

State:

Zip:

Submittal Date: Tue Jan 05 10:15:07 EST 2016

Committee Statement

Resolution: The proposed text to reference the DOE Handbook in Section 2 is moved to Annex K.2 as a FR- #5.It is intended as an information resource only. Chapter 2 contains referenced publications which areconsidered part of the requirements of the standard.


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2.3.6 UL Publications.


ANSI/UL 50, Standard for Enclosures for Electrical Equipment, 2007. Revised 2015.

ANSI/UL 50E, Standard for Electrical Equipment, Environment Considerations, 2007, Revised 2015 .

ANSI/UL 508, Standard for Industrial Control Equipment, 1999, Revised 2010 2013 .

UL 508A, Standard for Industrial Control Panels, 2001, Revised 2010 2014 .

ANSI/UL 870, Standard for Wireways, Auxiliary Gutters and Associated Fittings, 2008, Revised 2013 .

ANSI/UL 1063, Standard for Machine-Tool Wires and Cables, 2006, Revised 2012 .

ANSI/UL 1581, Reference Standard for Electrical Wires, Cables and Flexible Cords, 2001, Revised2011 2015 .

ANSI/UL 2556 , UL Standard for Safety for Wire and Cable Test Methods , 2015


UL Standards listed have been updated/revised to newer editions.

UL 2556 is the tri-national (US, Canada, Mexico) version of UL 1581. UL 1581 is being revised to move the methods to UL 2556. Rather than referencing one standard which then refers to another standard, having the direct reference is preferred.


Submitter Full Name: Ronald Farr

Organization: Ul Llc

Street Address:

City:

State:

Zip:


Committee Statement

Resolution: There is no reference to UL 2556 in NFPA 79.


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Public Input No. 124-NFPA 79-2016 [ New Section after 3.3 ]

TITLE OF NEW CONTENT Autotransformer

Type your content here ...3.3.X Autotransformer: A type of transformer in which the primary and secondary

coils have part of, or all of their turns in common.


To provide a definition for an single winding transformer (autotransformer).


Submitter Full Name: George Schreck

Organization: Komatsu America Industries, LL

Street Address:

City:

State:

Zip:


Committee Statement

Resolution: Adding a definition of autotransformer would be beneficial. However, the submitter does not identifythe source of the definition. Further, comparing definitions of autotransformer from various sources tothe submitter’s there is a confusion regarding the primary and secondary coils have part of, or all oftheir turns in common.


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3.3.5* Adjustable Speed Drive.

A combination of the power converter, motor, and motor mounted auxiliary devices such as encoders,tachometers, thermal switches and detectors, air blowers, heaters, and vibration sensors.

Power conversion equipment that provides a means of adjusting the speed of an electric motor.

[ 70 :100]


Consider revising this definition as recommended to correlate with the definition in the 2014 NEC.


Submitter Full Name: Mark Hilbert

Organization: MR Hilbert Electrical Inspecti

Street Address:

City:

State:

Zip:

Submittal Date: Thu Jan 07 21:47:57 EST 2016

Committee Statement

Resolution: FR-18

Statement: The definition of "adjustable speed drive" is revised to correlate with the definition in the 2014 NEC.The annex material for A.3.3.5 is revised to add the text of the Informational Note to the definition of"adjustable speed drive" in the 2014 NEC at the end of the existing text of A.3.3.5. The definition of"adjustable speed drive system" in the 2014 NEC is added as a new section in Chapter 3 as this termis being added to Chapter 4.


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3.3.xx Basic protection

protection against electric shock under fault-free conditions


The IEC terminology “protection against direct contact” has been replaced with “basic protection” in the Ed. 6 of IEC 60204-1 and all other IEC standards. The terminology in NFPA 79 should align where feasible with IEC 60204-1.



Public Input No. 105-NFPA 79-2016 [New Section after A.3.3.8]

Public Input No. 162-NFPA 79-2016 [Chapter 6]




Street Address:

City:

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Zip:


Committee Statement


Statement: The committee accepts the new definition of “basic protection” but adds the term “protection fromdirect contact” in parenthesis for historical reference for one revision cycle for a better understandingof the terms. The committee also accepts the new annex note.


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3.3.13 Cableless Wireless Control.

Control devices employing wireless techniques (e.g., radio, infrared) techniques for transmittingcommands and signals between a machine control system and operator control station(s) that are notconnected by conductors or cables .






Street Address:

City:

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Committee Statement

Resolution: “Cableless control” is globally accepted terminology used when using wireless techniques tocommunicate between a machine control system and operator control stations. Changing to “wirelesscontrol” could lead to confusion as wireless technologies can be used for other types of control (forexample, between a control system and field sensors and actuators.). Note: 9.2.7.1 provides adescription of cableless control with essentially the same wording as the definition.


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3.3.14* Cableless Wireless Operator Control Station.

An operator control station that is capable of using wireless techniques (e.g., radio, infrared) techniquesthat are not connected by conductors or cables, to communicate with one or more machines and thatincorporates a self-contained power source, such as a battery.






Street Address:

City:

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Committee Statement

Resolution: “Cableless operator control station” is globally accepted terminology used when using wirelesstechniques to communicate between a machine control system and operator control stations.Changing to “wireless control” could lead to confusion as wireless technologies can be used for othertypes of control (for example, between a control system and field sensors and actuators.). Note:9.2.7.1 provides a description of cableless control with essentially the same wording as the definition.


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Public Input No. 193-NFPA 79-2016 [ Section No. 3.3.19.4 ]

3.3.19.4* Liquidtight Flexible Nonmetallic Conduit (LFNC).

A raceway of circular cross section of various types as follows: (1) A smooth seamless inner core and coverbonded together and having one or more reinforcement layers between the core and covers, designated asType LFNC-A; (2) A smooth inner surface with integral reinforcement within the raceway wall, designatedas Type LFNC-B; (3) A corrugated internal and external surface without integral reinforcement within theconduit raceway wall, designated as LFNC-C.

[ 70 :356.2]


Consider revising this definition as recommended to correlate with the definition in the 2014 NEC.




Street Address:

City:

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Committee Statement


Statement: Revised this definition as recommended to correlate with the definition in the 2014 NEC.


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TITLE OF NEW CONTENT

Type your content here ...

3.3.33 NEW

Add the definition of Effective Ground Fault Current Path to be copied from NEC Article 100

Effective Ground-Fault Current Path. An intentionally constructed, low-impedance electrically conductivepath designed and intended to carry current under ground-fault conditions from the point of a ground faulton a wiring system to the electrical supply source and that facilitates the operation of the overcurrentprotective device or ground-fault detectors.


This term is proposed in Chapter 8 and adding the definition will help users understand the term.




Street Address:

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Committee Statement


Statement: This term was added in Chapter 8 and adding the definition will help users understand the term.


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3.3.40 Exposed (as applied to live energized electrical conductors or circuit parts).

Capable of being inadvertently touched or approached nearer than a safe distance by a person. It is appliedto parts not suitably guarded, isolated, or insulated.

[ 70E :100]


Consider revising this definition as recommended to correlate with the definition in the NFPA 70E.




Street Address:

City:

State:

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Committee Statement

Resolution: Revising this definition would create an inconsistent use of terms within NFPA 79. Based on Section1.5 the NEC is the reference document for NFPA 79 is the NEC which uses live parts.


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3.yy* Fault Protection

protection against electric shock under single-fault conditions


The IEC terminology “protection against indirect contact” has been replaced with “fault protection” in the Ed. 6 of IEC 60204-1 and all IEC standards. The terminology in NFPA 79 should align where feasible with IEC 60204-1.



Public Input No. 106-NFPA 79-2016 [New Section after A.3.3.42]





Street Address:

City:

State:

Zip:


Committee Statement


Statement: The committee accepts the new definition of the term “fault protection” but adds the term “protectionfrom indirect contact” for historical reference for one revision cycle for a better understanding of theterms. The committee also accepts the new annex note.


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Public Input No. 195-NFPA 79-2016 [ Sections 3.3.64.2, 3.3.64.2 ]

Sections 3.3.64.2, 3.3.64.2

3.3.64.2 Wet Location.

Installations underground or in concrete slabs or masonry in direct contact with the earth; and in locationssubject to saturation with water or other liquids, such as vehicle washing areas; and in unprotectedlocations exposed to weather. [70:100]

3.3.64.2 Wet Location.

Installations underground or in concrete slabs or masonry in direct contact with the earth; and in locationssubject to saturation with water or other liquids, such as vehicle washing areas; and in unprotectedlocations exposed to weather. [70:100]


Revise this definition as recommended to correlate with the definition in the 2014 NEC.




Street Address:

City:

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Committee Statement


Statement: Revise this definition of "wet location" by removing the word "and" and retain the definition of "drylocation" as recommended to correlate with the definitions in the 2014 NEC.


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Fine Print Note:

See DOE HANDBOOK 1003 - " GUIDE TO GOOD PRACTICES FOR TRAINING AND QUALIFICATIONOF MAINTENANCE PERSONNEL" for guidance of qualified persons criteria germane to maintenance jobtasks


Give informational guidance to reconciling qualifications of maintenance workers performing electrical job tasks.



Public Input No. 111-NFPA 79-2016 [New Section after 2.3.2] clarification and documentation


Submitter Full Name: David Carpenter

Organization: City Of Florence Alabama

Street Address:

City:

State:

Zip:


Committee Statement

Resolution: An informational reference in Annex K.2 created (FR-5) which eliminates the need for aninformational note


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3.3.91 Socket.

See 3.3.77 , Receptacle.


This is an IEC term and should have been deleted in the 2015 edition.




Street Address:

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Committee Statement

Resolution: The term “socket’ is used in multiple locations in the standard. Each use of the term should bereviewed and its deletion considered if the definition is to be deleted.


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Visible.

Able to be seen. May require the movement of surrounding equipment or unmounting of equipment to beseen.


The term is used throughout the standard and needs to be defined.


Submitter Full Name: Robert Gruendel

Organization: Dematic

Street Address:

City:

State:

Zip:


Committee Statement

Resolution: The term “visible” is easily understood and the proposed definition does not add clarity to thestandard. It is the dictionary


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Visible, Clearly

Able to be seen without the movement of surrounding equipment or unmounting of equipment to be seen.


The term clearly (and plainly) visible are used throughout the standard and needs to be defined.


Submitter Full Name: Robert Gruendel

Organization: Dematic

Street Address:

City:

State:

Zip:


Committee Statement

Resolution: A definition of "clearly visible" is not needed as this term has been removed from the standard by theaction on FR-2.


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Public Input No. 109-NFPA 79-2016 [ Chapter 4 [Title Only] ]

General Operating Conditions Requirements


This change better reflects that the Chapter contains requirements and aligns with the title in IEC 60204-1.




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Committee Statement


Statement: The revised title more accurately reflects the material covered in Chapter 4.


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Type your content here .4.3.2.8 Control voltage derived from voltage greater than 120vac.

A single winding transformer (autotransformer) shall not be used to convert 120vac control voltage fromgreater voltage supply source (i.e.: load side of Main Disconnect Switch).

Additional Proposed Changes

File Name Description Approved

Tapped_autotransformer.svg.png Autotransformer


Use of autotransformer for control voltage, a short or open in tapped secondary will cause full primary voltage to be applied to control circuit, allowing over-voltage potential to be applied to devices not so rated. Shock and fire hazard potential..




Street Address:

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Committee Statement

Resolution: The standard currently does not allow the use of an autotransformer for control circuits. Thestatement prohibiting the use of autotransformers for control circuits currently exists in Clause 9.1.1.1(Control Circuit Supply). An additional statement in Chapter 4 is considered unnecessary.


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4.3.2.3 Harmonics.

The electrical equipment shall be designed to operate correctly where the harmonic distortion from theelectric supply does not exceed 10 percent 12 percent of the total voltage (rms value) betweenungrounded conductors for the sum of the second through fifth harmonic. An additional 2 percent of thetotal voltage (rms value) between ungrounded conductors for the sum of the sixth through thirtiethharmonic shall be permitted.


This change aligns with changes in Ed. 6 of IEC 60204-1 to correct requirements for expected harmonic levels in an industrial environment.




Street Address:

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Committee Statement

Resolution: The proposed text does not align with proposed changes in IEC 60204-1 Ed. 6. In addition, there isno technical reference to the origin of the new harmonic levels and no substantiation is provided forwhy they should be increased.


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4.4.2* Electromagnetic Compatibility (EMC).

Transient suppression, isolation, or other appropriate means shall be provided where the equipment of anindustrial machine generates electrical noise or transients, which can affect the operation ofequipment that industrial machine .


The wording has been confusing due to the use of the term "the" describing the noise generating equipment but no term used to describe which equipment could be affected. The owner or their designer needs to address what type of equipment needs to be separated from other types of equipment that are not part of the same industrial machine.




Street Address:

City:

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Committee Statement


Statement: The proposed revision restricts the requirement for inclusion of noise suppression techniques to onlyprevent adverse conditions to the machine producing or receiving the noise itself. The effects onother equipment within the surrounding area must be considered but the machine is not required tohave noise suppression for other such equipment.


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Public Input No. 101-NFPA 79-2016 [ Section No. 4.8 ]

4.8 Available Fault Current.

The available fault current at the point(s) of the supply to the each industrial control panel of a machineshall not be greater than the short-circuit current rating marked on the industrial control panel nameplate.


The revised text provides clarification for machines with more than one source of supply and/or control panel.




Street Address:

City:

State:

Zip:

Submittal Date: Sun Jan 03 15:38:08 EST 2016

Committee Statement


Statement: The revised text provides clarification for machines with more than one source of supply and/orcontrol panels. The committee agrees with the submitted substantiation as it is current practice wheremore than one source of supply is present.


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Incoming Chapter 5 Supply Circuit Conductor Terminations and Devices for Disconnecting Meansand Removing Power Terminations


The title of Chapter 5 is excessively long and does not very well describe the Chapter. The term supply circuit includes the concept of being "incoming" and the term "disconnecting means" includes the concept of "removing power".




Street Address:

City:

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Committee Statement


Statement: The title of Chapter 5 is excessively long and does not very well describe the Chapter. The termsupply circuit includes the concept of being "incoming" and the term "disconnecting means" includesthe concept of "removing power".


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5.1.6

Each set of incoming supply circuit conductors on the line side of the disconnecting means shall beseparated from all other internal conductors, including conductors of other supply circuits by either of thefollowing:

(1) Mounting the supply circuit disconnect as near as practicable to the top of the enclosure withdedicated wire bending space as in 5.1.5

(2) Mounting the supply circuit disconnect other than at the top of the enclosure and by separating thesupply circuit conductors from other internal conductors by the use of a barrier. Devices, terminalblock assemblies, device mounting brackets or plates, do not constitue a barrier.


Many items can be used to create a "barrier." Definitions of barrier (in 79 and 70E) do not specify what constitutes a "barrier" -- size, material, etc. Emphasis is not given to (1). JIC E3.9.3 was specific: The disconnecting means shall be mounted at the top of the control panel with no other equipment mounted directly above it. When dealing with "foreign" users who are translating into their own language, vagueness can and does lead to miss interpretation and hence, implementation.




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Committee Statement

Resolution: The definition of “barrier” is located in chapter 3. Revising or explaining the definition at each locationwhere the term is used does not add clarity or understanding to the term. Some of the items includedin the proposed additional sentence such as "plates" could be used as a barrier. This section isaddressing separation of the conductors, not the terminations or device mounting brackets.


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5.3 Supply Incoming supply Circuit Disconnecting (Isolating) Means.

5.3.1 General.

The following general requirements apply to 5.3.2 through 5.3.5.

5.3.1.1

A supply An incoming supply circuit disconnecting means shall be provided for the following:

(1) Each incoming supply circuit to a machine

(2) The incoming supply circuit to a feeder system using collector wires, collector bars, slip-ringassemblies, or flexible cable systems (reeled, festooned) to a machine or a number of machines

(3) Each on-board power source (e.g., generators, uninterruptible power supplies)

Exception: Communication, remote control, and signaling circuits of less than 50 volts shall not berequired to be provided with a supply circuit disconnecting means.

5.3.1.1.1 *

Each disconnecting means required by 5.3.1.1 shall be legibly marked to indicate the equipment itdisconnects.

5.3.1.1.2

Where a machine is supplied by more than one incoming supply circuit, a marking shall be installed ateach incoming supply circuit disconnect location denoting the location of all other incoming supply circuitdisconnects.

5.3.1.2

The incoming supply circuit disconnecting means shall disconnect (isolate) the electrical equipment of themachine, including all control circuits, from the incoming supply circuit when required (e.g., for work on themachine, including the electrical equipment). Circuits that are not required to be disconnected by theincoming supply circuit disconnecting means shall comply with 5.3.5.

5.3.1.3

Each incoming supply circuit disconnecting means other than attachment plugs and receptacles shall bemounted within the control enclosure or immediately adjacent thereto.

Exception No. 1: Externally mounted incoming supply circuit disconnecting means, whether interlocked ornot interlocked with the control enclosure, supplying machines totaling 2 hp or less shall be permitted tobe mounted up to 6 m (20 ft) away from the enclosure,provided the disconnecting means is in sight fromand readily accessible to the operator.

Exception No. 2: A supply An incoming supply circuit disconnecting means mounted in a separateenclosure and interlocked in accordance with 6.2.4 with the control enclosure(s) it supplies shall bepermitted to be mounted up to 6 m (20 ft) away,provided the disconnecting means is in sight from thecontrol enclosure(s) and readily accessible to the operator. The control enclosure(s) shall be markedindicating the location of the disconnecting means. The disconnecting means shall be marked indicatingthe industrial machine it supplies.

5.3.1.4

Each incoming supply circuit disconnecting means mounted within or adjacent to the control enclosureshall be interlocked with the control enclosure in accordance with 6.2.4.

Exception: Where a supply an incoming supply circuit disconnecting means, supplying machines totaling2 hp or less is not located within or adjacent to the control enclosure it supplies, the control enclosureshall comply with 6.2.4 or 6.2.5. Where a incoming supply circuit disconnecting means is an attachmentplug and receptacle, the control enclosure it supplies shall comply with 6.2.5. Where 6.2.5 is used, asafety sign shall be provided in accordance with Section16.2.


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5.3.1.5

Where two or more disconnecting means are provided within the control enclosure for multiple supplycircuits, they shall be grouped in one location where practicable. Protective interlocks for their correctoperation shall be provided where a hazardous condition or damage to the machine or to the work inprogress can occur.

5.3.2 Type.

The incoming supply circuit disconnecting device shall be one of the following types:

(1) A listed motor circuit switch (switch disconnector) rated in horsepower

(2) A listed molded case circuit breaker

(3) A listed molded case switch

(4) An instantaneous trip circuit breaker that is part of a listed combination motor controller

(5) A listed self-protected combination controller limited to single motor applications

(6) An attachment plug and receptacle (plug/socket combination) for cord connection

5.3.3 Requirements.

5.3.3.1 *

Where the incoming supply circuit disconnecting device is one of the types in 5.3.2 (1) through 5.3.2 (5),the device shall fulfill all of the following requirements:

(1) Isolate the electrical equipment from the supply circuit and have one off (open) and one on (closed)position only. Circuit breakers, molded-case switches, and self-protected combination motorcontrollers are permitted to have a reset (tripped) position between off (open) and on (closed).

(2) Have an external operating means (e.g., handle) that complies with 5.3.4.

Exception: Power-operated switchgear need not be operable from outside the enclosure where thereare other means to open it.

(3) Be provided with a permanent means permitting it to be locked in the off (open) position only (e.g., bypadlocks), independent of the door position. When so locked, remote as well as local closing shall beprevented.

(4) Simultaneously disconnect all ungrounded conductors of the incoming power supply circuit.

(5) Be operable, by qualified persons, independent of the door position without the use of accessory toolsor devices.

(6) Be rated for the application as follows:

(7) The ampere rating shall be at least 115 percent of the sum of the full-load currents required forall equipment that is in operation at the same time under normal conditions of use.

(8) Where rated in horsepower, the horsepower rating shall be at least equal to that which isdefined by Table 430.251(B) of NFPA 70 , for a locked rotor current equal to the largest sumresulting from the locked rotor currents of any combination of motors that can be startedsimultaneously and the full-load currents of the remaining motor and non-motor loads that canbe operated at that time.

(9) The voltage rating shall be at least equal to the nominal supply circuit voltage.

(10) The disconnecting means shall plainly indicate whether it is in the open (off) or closed position.


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5.3.3.2 *

When the incoming supply circuit disconnecting device is an attachment plug and receptacle (plug/socketcombination), it shall fulfill all of the following requirements:

(1) Have a load-break rating or be interlocked with a switching device that is load-break rated andcomplies with 5.3.3.1(6). An attachment plug and receptacle (plug/socket combination) rated greaterthan 20 amperes or 2 hp shall be listed as a switch-rated plug and receptacle (plug/socketcombination).

(2) Be of such a type and be so installed as to prevent unintended contact with live parts at any time,even during insertion or removal of the connectors.

(3) Have a first-make, last-break electrical grounding contact.

(4) Have a retaining means to prevent unintended or accidental disconnection where rated at more than20 amperes.

(5) Be located within sight from the operator station and be readily accessible.

5.3.3.3

In addition to the requirements in 5.3.3.2, an additional switching device on the machine shall be providedfor routine power switching operations of the machine on and off.

5.3.4 Operating Handle.

5.3.4.1

The center of the grip of the operating handle of the disconnecting means, when in its highest position, shallbe not more than 2.0 m (6 ft 7 in.) above the servicing level. A permanent operating platform, readilyaccessible by means of a permanent stair or ladder, shall be considered the servicing level for the purposeof this requirement.

5.3.4.2

An operating handle of the disconnecting means required by 5.3.3.1 shall meet the following criteria:

(1) Be readily accessible with doors in the open or closed position

(2) Maintain the environmental rating of the enclosure to the degree necessary for the application wheninstalled through the control enclosure

(3) Not be restricted by the enclosure door when the door is in the open position

5.3.5 Excepted Circuits.

5.3.5.1

The following circuits shall not be required to be disconnected by the main incoming supply circuitdisconnecting means:

(1) Lighting circuits for lighting needed during maintenance or repair

(2) Attachment plugs and receptacles (plug and socket outlets) for the exclusive connection of repair ormaintenance tools and equipment (e.g., hand drills, test equipment)

(3) Undervoltage protection circuits that are only used for automatic tripping in the event of supply circuitfailure

(4) Circuits supplying equipment that are required to remain energized for satisfactory operation [e.g.,temperature-controlled measuring devices, product (work in progress) heaters, program storagedevices, inputs, non-motion outputs and displays ]


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5.3.5.2

The incoming supply circuits for excepted circuits shall be provided with all of the following:

(1) A disconnecting means, isolating transformer, and overcurrent protection mounted in an enclosureadjacent to the main control enclosure or within the control enclosure, adjacent to the main supplycircuit disconnecting means.

(2) Line side (of the incoming supply circuit disconnect) input supply circuit conductors, when internal tothe control enclosure, that are separate from and do not share a raceway with other conductors andthat are encased in rigid or flexible conduit if longer than 460 mm (18 in.)

5.3.5.3

The control interlocking circuits shall be capable of being disconnected at the control panel from which theyare sourced.

5.3.5.4

Where the excepted circuits are not disconnected by the incoming supply circuit disconnecting means, allof the following requirements shall be met:

(1) Permanent safety sign(s), shall be placed adjacent to the incoming supply circuit disconnectingoperating handle(s), indicating that it does not de-energize all exposed live parts when it is in the open(off) (isolated) position as in 16.2.4.

(2) A statement containing the information from 16.2.4 shall be included in the machine documentation.

(3) A permanent safety sign shall be placed on a nonremovable part inside the control enclosure inproximity to each excepted circuit, or shall be identified by color as defined in 13.2.4.


Editorial revisions for consistence - added "incoming" in multiple locations. Also added text to correlate with PI 175.

Additionally, I request the panel to consider how to differentiate between the requirements for the main incoming supply circuits/disconnects and downstream control enclosures supplied from the main control enclosure. Perhaps a task group can be created before the FR Meeting to address this issue.



Public Input No. 175-NFPA 79-2016 [Section No. 9.1.1.4]


Submitter Full Name: Daniel Neeser

Organization: Eaton’s Bussmann Division

Street Address:

City:

State:

Zip:


Committee Statement


Statement: The terms “incoming” and “supply” are redundant. “Supply” is the more common of the two and ismaintained for consistency with the remainder of the standard.

5.3.1.1.1. If a single main disconnecting means is provided on the supply side of multiple


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disconnecting means it needs to be marked to describe its purpose to differentiate it from the otherdisconnecting means, so that it can be operated to de-energize all supply conductors. The additionalrequirement would apply only if a single main is provided and only adds a marking requirement. Thelanguage in Annex A indicates that it is necessary but that is not enforceable.

5.3.1.3 reformatted for readability. The reference to the disconnect to be readily accessible to theoperator in Exception No. 1 has been removed because the operator has access to an emergencystop and operating the disconnect during normal operation could create a safety concern.

5.3.1.4 New exception is added that provides another option that meets an equivalent control as theexisting requirement.

Language added to 5.3.2 (4) to correlate with (5).

Language added to 5.3.3.1 (1) to correlate with 5.3.2 and because the generic term “circuit breaker”implies inverse time and some users have taken this to mean that instantaneous trip circuit breakersare not included.

5.3.5.1 Item (4) is revised to correlate with other rules such as the exception to 9.1.1.4.

5.3.3.1 Stating that the disconnect must be interlocked with the door limits the requirement toenclosures utilizing doors. New technology equipment is utilizing removable covers (not hingeddoors) so clarifying this requirement includes both doors and covers improves the intended safetyafforded by this required interlocking.


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Public Input No. 134-NFPA 79-2016 [ Section No. 5.3.1.1.1 ]

5.3.1.1.1*

Each disconnecting means required by 5.3.1.1 shall be legibly marked to indicate the equipment itdisconnects. A main disconnecting means shall be marked as main if multiple disconnecting means aresupplied from the main disconnecting means.


If multiple disconnecting means are provided on the load side of a main the main needs to be marked as such. This needs to be a rule rather than a vague explanatory statement in Annex A.




Street Address:

City:

State:

Zip:


Committee Statement



5.3.1.1.1. If a single main disconnecting means is provided on the supply side of multipledisconnecting means it needs to be marked to describe its purpose to differentiate it from the otherdisconnecting means, so that it can be operated to de-energize all supply conductors. The additionalrequirement would apply only if a single main is provided and only adds a marking requirement. Thelanguage in Annex A indicates that it is necessary but that is not enforceable.






5.3.3.1 Stating that the disconnect must be interlocked with the door limits the requirement toenclosures utilizing doors. New technology equipment is utilizing removable covers (not hingeddoors) so clarifying this requirement includes both doors and covers improves the intended safety


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afforded by this required interlocking.


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5.3.1.3

Each supply circuit disconnecting means other than attachment plugs and receptacles shall be mountedwithin the control enclosure or immediately adjacent thereto.

Exception No. 1: Externally mounted supply circuit disconnecting means, whether interlocked or notinterlocked with the control enclosure, supplying machines totaling 2 hp or less shall be permitted to bemounted up to 6 m (20 ft) away from the enclosure,provided the disconnecting means is in sight from andreadily accessible to the operator. the control enclosure(s) and is readily accessible. The controlenclosure(s) shall be marked to indicate the location of the disconnecting means. The disconnectingmeans shall be marked to indicate the machine supplied.

Exception No. 2: A supply circuit disconnecting means mounted in a separate enclosure and interlockedin accordance with 6.2.4 with the control enclosure(s) it supplies shall be permitted to be mounted up to6 m (20 ft) away,provided the disconnecting means is in sight from the control enclosure(s) and is readilyaccessible to the operator . The control enclosure(s) shall be marked indicating to indicate the locationof the disconnecting means. The disconnecting means shall be marked indicating to indicate theindustrial machine it supplies supplied .


Revise the exceptions for consistency in application and terminology and to make it clear the disconnecting means must be readily accessible in all cases not just to the operator. Additionally the term “operator” was removed as is not defined in NFPA 79 and therefore can have different interpretations.

The main rule is to have a disconnecting means within or immediately adjacent to the control enclosure. Therefore, the “within sight from” requirement should be from the control enclosure it supplies not from the operator whom may not be stationed at the control enclosure. Revising Exception No. in this manner will also provide consistency with Exception No. 2 which requires the disconnecting means to be within sight of the control enclosure.

The word "industrial" was removed from in front of "machine in Exception No. 2 for consistency as it is not used that way anywhere else in this section. The entire Standard applies to industrial machines so it is not necessary here.




Street Address:

City:

State:

Zip:


Committee Statement



5.3.1.1.1. If a single main disconnecting means is provided on the supply side of multiple


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disconnecting means it needs to be marked to describe its purpose to differentiate it from the otherdisconnecting means, so that it can be operated to de-energize all supply conductors. The additionalrequirement would apply only if a single main is provided and only adds a marking requirement. Thelanguage in Annex A indicates that it is necessary but that is not enforceable.








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5.3.3.1 *

Where the supply circuit disconnecting device is one of the types in 5.3.2 (1) through 5.3.2 (5), the deviceshall fulfill all of the following requirements:

(1) Isolate the electrical equipment from the supply circuit and have one off (open) and one on (closed)position only. Circuit breakers, molded-case switches, and self-protected combination motorcontrollers are permitted to have a reset (tripped) position between off (open) and on (closed).

(2) Have an external operating means (e.g., handle) that complies with 5.3.4.

Exception: Power-operated switchgear need not be operable from outside the enclosure where thereare other means to open it.

(3) Be provided with a permanent means permitting it to be locked in the off (open) position only (e.g., bypadlocks), independent of the door or cover position. When so locked, remote as well as local closingshall be prevented.

(4) Simultaneously disconnect all ungrounded conductors of the power supply circuit.

(5) Be operable, by qualified persons, independent of the door or cover position without the use ofaccessory tools or devices.

(6) Be rated for the application as follows:

(7) The ampere rating shall be at least 115 percent of the sum of the full-load currents required forall equipment that is in operation at the same time under normal conditions of use.

(8) Where rated in horsepower, the horsepower rating shall be at least equal to that which isdefined by Table 430.251(B) of NFPA 70 , for a locked rotor current equal to the largest sumresulting from the locked rotor currents of any combination of motors that can be startedsimultaneously and the full-load currents of the remaining motor and non-motor loads that canbe operated at that time.

(9) The voltage rating shall be at least equal to the nominal supply circuit voltage.

(10) The disconnecting means shall plainly indicate whether it is in the open (off) or closed position.


Stating that the disconnect must be interlocked with the door limits the requirement to enclosures utilizing doors. New technology equipment is utilizing removable covers (not hinged doors) so clarifying this requirement includes both doors and covers improves the intended safety afforded by this required interlocking.


Submitter Full Name: Barry Boggs

Organization: Toyota Motor Engineering & Man

Affilliation: Toyota

Street Address:

City:

State:

Zip:


Committee Statement


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5.3.1.1.1. If a single main disconnecting means is provided on the supply side of multipledisconnecting means it needs to be marked to describe its purpose to differentiate it from the otherdisconnecting means, so that it can be operated to de-energize all supply conductors. The additionalrequirement would apply only if a single main is provided and only adds a marking requirement. Thelanguage in Annex A indicates that it is necessary but that is not enforceable.








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5.5.1

Devices shall be provided for disconnecting (isolating) electrical equipment to enable work to be performedwhen it is de-energized and isolated.

Revise to:

5.5.1 Electrical equipment shall be provided a means of disconnecting (isolating) which establishes anelectrically safe work condition.


Current statement is somewhat vague with the use of the pronoun "IT". Disconnecting Means, or the equipment. NFPA 79, 5.5.1 - is limited in scope to only De-energized and Isolated - neither of which are defined in Chapter 3.

However, NFPA 70E Article 120 uses the term "Establishing an Electrically Safe Work Condition" - which is also defined in Article 100 - "Electrically Safe Work Condition" - " A state in which an electrical conductor or circuit part has been disconnected from energized parts, locked/tagged in accordance with established standards, tested to ensure the absence of voltage, and grounded if determined necessary."


Submitter Full Name: Earl Sowders

Organization: Toyota Engineering

Street Address:

City:

State:

Zip:

Submittal Date: Tue Dec 15 15:04:05 EST 2015

Committee Statement

Resolution: The disconnecting (isolating) means does not create an electrically safe working condition. Creatingan electrically safe working condition is a process that includes additional steps beyond just operatingand locking or tagging a disconnecting means. (See 120.1 of NFPA 70E).


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Public Input No. 162-NFPA 79-2016 [ Chapter 6 ]

Chapter 6 Protection from Electrical Hazards

6.1 * General.

Electrical equipment shall provide protection of persons from electric shock , from direct and indirectcontact by basic protection (see 6.2 and 6.4) and fault protection (see 6.3 and 6.4) , and warn of potentialarc-flash hazards (see 6 .6).

6.2 * Basic Protection Against Direct Contact.

Live parts

.

6.2.1 General.

For each circuit and part of the electrical equipment operating at 50 volts rms ac or 60 volts dc or moreshall be guarded against contact , the basic protection (see 3.3.xx) requirements of 6.2.2 or 6.2.3 shall beapplied .

6.2. 1 2 Protection by Insulation of Live Parts.

Live parts protected by insulation shall be completely covered with insulation that can only be removed bydestruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, andthermal stresses to which the insulation is subjected under normal operating conditions. Paints, varnishes,lacquers, and similar products shall not be considered protection against electric shock under normaloperating conditions.

6.2. 2 Protection 3 Protection by Enclosures .

6.2.3 Direct Contact from Outside an Enclosure.

Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A,ANSI/UL 50, or NEMA 250. (See Figure 6.2.3.)

Figure 6.2.3 Jointed Test Finger.

Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure asprotection from electrical shock shall be determined by using a test finger as described in Figure 6.2.3.The test finger shall be applied, with only minimal force, in every opening in the enclosure after removal ofall parts of the enclosure that are capable of being removed without the use of a tool. The test finger shallnot encounter live parts in any direction.


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6.2. 4 3.1 Enclosure Interlocking.

When required by 5.3.1.4, each disconnecting means mounted within or adjacent to a control enclosurethat contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically orelectrically interlocked, or both, with the control enclosure doors so that none of the doors open unless thepower is disconnected. Interlocking shall be reactivated automatically when all the doors are closed.

Exception No. 1: A disconnecting means used only for maintenance lighting circuits within controlenclosures shall not be required to be interlocked with the control enclosure. A safety sign shall beprovided that meets the requirements of 16.2.4.

Exception No. 2: A disconnecting means used for power supply circuits within control enclosures tomemory elements and their support logic requiring power at all times to maintain information storageshall not be required to be interlocked with the control enclosure doors. A safety sign shall be providedthat meets the requirements of 16.2.4.

6.2. 4 3 .1 .1 *

Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gainaccess without removing power.

6.2. 4 3 . 1. 2

The interlocking means shall meet the following requirements:

(1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons todefeat the interlock

(2) Be reactivated automatically when the door(s) is closed

(3) Prevent closing of the disconnecting means while the door of the enclosure containing the disconnectis open, unless an interlock is operated by deliberate action

6.2. 4 3 . 1. 3

Where provided with a defeat mechanism as permitted in 6.2.4 3 .1. 2 (1), live parts mounted on the insideof doors that are operating at over 50 volts shall be protected from unintentional direct contact by theinherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) spherecannot contact any of the live parts in question.

6.2. 5 3.2 Enclosure Access.

When a qualified person, using appropriate work practices, needs to enter an enclosure that does not havea disconnect, one of the following conditions shall be met:

(1) The use of a key or tool shall be required for opening the enclosure.

(2) An enclosure door shall be permitted to be opened without the use of a key or a tool and withoutdisconnection of live parts only when all live parts inside are separately enclosed or guarded such thatthere cannot be any direct contact with live parts.

6.3 Protection Against Electric Shock from Indirect Contact (Fault Conditions) Fault Protection .

6.3.1 General * General .


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Protection against indirect contact

Fault protection (see 3.3.

20.2

yy ) is intended to prevent hazardous

conditions to continue in the event of a fault condition (e.g., insulation failure between

situations due to an insulation fault between live and exposed conductive parts

).

6.3.1.1 * Protection Against Indirect Contact.

Protection against indirect contact shall be achieved by the following

.

For each circuit part or part of the electrical equipment, at least one of the following measures shall beapplied :

(1) Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation (see6.3.1. 2), or

(2) Automatic disconnection of the supply (interruption of one or more of the ungrounded conductorsaffected by the automatic operation of a protective device in case of a fault) (see 6.3.1. 3).

6.3. 1. 2 Protection by Double Insulation.

Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall beas follows:

(1) Protection by use of double insulation is intended to prevent the occurrence of hazardous touchvoltages on the accessible parts through a failure in the basic insulation.

(2) When this means is used to prevent a hazardous touch voltage, the equipment shall be listed to beprotected by a system of double insulation, or its equivalent. Where such a system is employed, theequipment shall be distinctively marked.

6.3. 1. 3 Protection by Automatic Disconnection of Supply.

Automatic disconnection of the supply of any circuit affected by the particular circuit overcurrent protectivedevice in the event of a fault is intended to prevent an exposure to a continuous hazardous touch voltage.These protective measures comprise both of the following:

(1) Protective bonding of exposed conductive parts (see 8.2.3)

(2) The use of overcurrent protection devices for the automatic disconnection of the supply in the event ofa fault

6.4 Protection by the Use of Protective Extra Low Voltage (PELV).

6.4.1 General Requirements.

The use of PELV, as described in Section 6.4, is to protect persons against electric shock from indirectcontact and limited area direct contact.


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6.4.2

PELV circuits shall satisfy all of the following conditions:

(1) The nominal voltage shall not exceed the following:

(2) 30 volts ac (rms value) or 60 volts dc (ripple-free) when the equipment is used in normally drylocations and when large area contact of live parts with the human body is not expected

(3) 6 volts ac (rms value) or 15 volts dc (ripple-free) in all other cases

(4) One side of the circuit or one point of the source of the supply of that circuit shall be connected to theequipment grounding circuit.

(5) Live parts of PELV circuits shall be electrically separated from other live circuits. Electrical separationshall be not less than that required between the primary and secondary circuits of a safety isolatingtransformer.

(6) Conductors of each PELV circuit shall be physically separated from those of any other circuit. Whenthis requirement is impracticable, the insulation provisions of 13.1.3 shall apply.

(7) Attachment plugs and receptacles (plugs and socket combinations) for a PELV circuit shall conform tothe following:

(8) Attachment plugs (plugs) shall not be able to enter receptacles (socket-outlets) of other voltagesystems.

(9) Receptacles (socket-outlets) shall not admit plugs of other voltage systems.

6.4.3 Sources for PELV.

The source for PELV shall be one of the following:

(1) A safety isolating transformer

(2) A source of current providing a degree of safety equivalent to that of the safety isolating transformer(e.g., a motor generator with winding providing equivalent isolation)

(3) An electrochemical source (e.g., a battery) or another source independent of a higher voltage circuit(e.g., a diesel-driven generator)

(4) An identified electronic power supply conforming to standards specifying measures to be taken toensure that, even in the case of an internal fault, the voltage at the outgoing terminals does notexceed the values specified in 6.4.2 (1)

6.5 Protection Against Residual Voltages.

6.5.1

Live parts having a residual voltage greater than 60 volts after the supply has been disconnected shall bereduced to 60 volts or less within 5 seconds after disconnection of the supply voltage.

Exception No. 1: Exempted from this requirement are components having a stored charge of60 microcoulombs or less.

Exception No. 2: Where such a provision would interfere with the functioning of the equipment, a durablesafety sign drawing attention to the hazard and stating the delay required before entry to the enclosure isallowed shall be displayed at an easily visible location on or immediately adjacent to the enclosurecontaining the capacitance.

6.5.2

The withdrawal of plugs or similar devices, which results in the exposure of conductors (e.g., pins), shallhave a discharge time that does not exceed 1 second.

Exception No. 1: Exempted from this requirement are components having a stored charge of60 microcoulombs or less.

Exception No. 2: Exempted from this requirement are conductors that are protected against directcontact.

6.5.3 Discharge of Stored Energy.


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Capacitors shall be provided with a means of discharging stored energy. [70:460.6]

6.5.3.1 Time of Discharge.

The residual voltage of a capacitor shall be reduced to 50 volts, nominal, or less, within 1 minute after thecapacitor is disconnected from the source of supply. [70:460.6(A)]

6.5.3.2 Means of Discharge.

The discharge circuit shall be either permanently connected to the terminals of the capacitor or capacitorbank, or provided with automatic means of connecting it to the terminals of the capacitor bank on removalof voltage from the line. Manual means of switching or connecting the discharge circuit shall not be used.[70:460.6(B)]

6.6 Arc Flash Hazard Warning.

A safety sign shall be provided in accordance with 16.2.3.



Chapter_6_PI162_.docx PI162 with edits shown correctly


NOTE: The online editing system may not be correctly showing the proposed changes. Please see attached document with highlighted edits for proper review of this public input.

The IEC terminology “protection against direct contact” has been replaced with “basic protection” and the term “protection against indirectcontact” has been replaced with “fault protection”. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC 60204-1. Inaddition, some of the sections were renumbered to correct a numbering issue with 6.2.2 in the 2015 edition and to group the enclosure relatedclauses together.





Public Input No. 184-NFPA 79-2016 [Section No. A.6.2]

Public Input No. 185-NFPA 79-2016 [Section No. A.6.2.4.1]





Street Address:

City:

State:

Zip:


Committee Statement



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Statement: To maintain consistency with IEC 60204-1 and other IEC standards, the section is revised to use theterms “Basic Protection” and “Fault Protection” as they are not in conflict with NEC terms. The IECterminology “protection against direct contact” has been replaced with “basic protection” and the term“protection against indirect contact” has been replaced with “fault protection”. The revised languagealigns NFPA 79 with similar language in Ed. 6 of IEC 60204-1.The revised text retains the use of theterm “Live parts” in section 6.2.1 for consistency within NFPA 79 and the NEC.

Renumbering of 6.1 – 6.3 was done to correct editorial errors and group "enclosure" relatedrequirements together.

The phrase “and warn of potential arc-flash hazards” was removed because Chapter 16 contains therequirements for markings and signs.

Figure 6.2.3 was retained as normative requirements cannot be located in an informative annex.

Class 2 circuits have a long history of acceptable use without additional shock barriers in the NECand now specifically addressed in NFPA 79. There is no reason they should not be allowed to beused for industrial machinery as protection from shock.

Annex

Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated.

Moving A.6.2.4.1 to A.6.2.3.1.1--PI162 moved reference section.

Moving A.6.3.1.1 to A.6.3.1--PI162 moved reference section.


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This data is the property of Schenck Process, LLC. The infonnation contained hereon is to be treated in confidence and is not to be used directly or indirectly in any way detrimental to our interests.

Chapter 6 Protection from Electrical Hazards 6.1* General. Electrical equipment shall provide protection of persons from electric shock, by basic protection (see 6.2 and 6.4) and fault protection (see 6.3 and 6.4) from direct and indirect contact, and warn of potential arc-flash hazards.

6.2* Basic Protection Against Direct Contact. 6.2.1 General

For each circuit and part of the electrical equipment Live parts operating at 50 volts rms ac or 60 volts dc or more, the basic protection (see 3.3.xx) requirements of 6.2.2 or 6.2.3 shall be applied. shall be guarded against contact.

6.2.21 Protection by Insulation of Live Parts. Live parts protected by insulation shall be completely covered with insulation that can only be removed by destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, and thermal stresses to which the insulation is subjected under normal operating conditions. Paints, varnishes, lacquers, and similar products shall not be considered protection against electric shock under normal operating conditions.

6.2.2 Protection by Enclosures. 6.2.3 Protection by Enclosures. Direct Contact from Outside an Enclosure. Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A, ANSI/UL 50, or NEMA 250. (See Figure 6.2.3.)


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Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure as protection from electrical shock shall be determined by using a test finger as described in Figure 6.2.3. The test finger shall be applied, with only minimal force, in every opening in the enclosure after removal of all parts of the enclosure that are capable of being removed without the use of a tool. The test finger shall not encounter live parts in any direction. 6.2.3.1 4 Enclosure Interlocking. When required by 5.3.1.4, each disconnecting means mounted within or adjacent to a control enclosure that contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doors open unless the power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed.

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Exception No. 1: A disconnecting means used only for maintenance lighting circuits within control enclosures shall not be required to be interlocked with the control enclosure. A safety sign shall be provided that meets the requirements of 16.2.4. Exception No. 2: A disconnecting means used for power supply circuits within control enclosures to memory elements and their support logic requiring power at all times to maintain information storage shall not be required to be interlocked with the control enclosure doors. A safety sign shall be provided that meets the requirements of 16.2.4. 6.2.3.1.1 4.1* Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gain access without removing power.

6.2.3.1.2 4.2 The interlocking means shall meet the following requirements:

1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons to defeat the interlock

2) Be reactivated automatically when the door(s) is closed

3) Prevent closing of the disconnecting means while the door of the enclosure containing the disconnect is open, unless an interlock is operated by deliberate action

6.2.3.1.3 4.3 Where provided with a defeat mechanism as permitted in 6.2.3.1.2 4.2 (1), live parts mounted on the inside of doors that are operating at over 50 volts shall be protected from unintentional direct contact by the inherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question.

6.2.3.2 5 Enclosure Access. When a qualified person, using appropriate work practices, needs to enter an enclosure that does not have a disconnect, one of the following conditions shall be met:

1) The use of a key or tool shall be required for opening the enclosure.

2) An enclosure door shall be permitted to be opened without the use of a key or a tool and without disconnection of live parts only when all live parts inside are separately enclosed or guarded such that there cannot be any direct contact with live parts.

6.3 Fault Protection Against Electric Shock from Indirect Contact (Fault Conditions). 6.3.1* General. Fault Pprotection against indirect contact (see 3.3.yy20.2) is intended to prevent hazardous conditions to continue in the event of an insulation fault condition (e.g., insulation failure between live and exposed conductive parts).

6.3.1.1* Protection Against Indirect Contact. For each circuit part or part of the electrical equipment, at least one of the following measures shall be applied: Protection against indirect contact shall be achieved by the following:

1) Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation (see 6.3.1.2), or

2) Automatic disconnection of the supply (interruption of one or more of the ungrounded conductors affected by the automatic operation of a protective device in case of a fault) (see 6.3.1.3).

6.3.1.2 Protection by Double Insulation. Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall be as follows:

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1) Protection by use of double insulation is intended to prevent the occurrence of hazardous touch voltages on the accessible parts through a failure in the basic insulation.

2) When this means is used to prevent a hazardous touch voltage, the equipment shall be listed to be protected by a system of double insulation, or its equivalent. Where such a system is employed, the equipment shall be distinctively marked.

6.3.1.3 Protection by Automatic Disconnection of Supply. Automatic disconnection of the supply of any circuit affected by the particular circuit overcurrent protective device in the event of a fault is intended to prevent an exposure to a continuous hazardous touch voltage. These protective measures comprise both of the following:

1) Protective bonding of exposed conductive parts (see 8.2.3)

2) The use of overcurrent protection devices for the automatic disconnection of the supply in the event of a fault

6.4 – 6.6 remain unchanged

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6.1* General.

Electrical equipment shall provide protection of persons from electric shock, from direct and indirectcontact, and warn of potential arc-flash hazards .


Electric equipment does not warn of anything. It is already repetitive to have the rule in 6.6 but this is worse.




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Committee Statement







Annex





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6.2 * Protection Against Direct Contact.

Live parts operating at 50 volts rms ac or 60 volts dc or more shall be guarded against contact.

6.2.1 Protection by Insulation of Live Parts.

Live parts protected by insulation shall be completely covered with insulation that can only be removed bydestruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, andthermal stresses to which the insulation is subjected under normal operating conditions. Paints, varnishes,lacquers, and similar products shall not be considered protection against electric shock under normaloperating conditions.

6.2.2 Protection by Enclosures.

6.2.

3

2.1 Direct Contact from Outside an Enclosure.

Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A,ANSI/UL 50, or NEMA 250. (See Figure 6.2.3 .)

Figure 6.2.

3 Jointed

2 Jointed Test Finger.

Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure asprotection from electrical shock shall be determined by using a test finger as described in Figure 6.2.3 .The test finger shall be applied, with only minimal force, in every opening in the enclosure after removalof all parts of the enclosure that are capable of being removed without the use of a tool. The test fingershall not encounter live parts in any direction.

6.2.

4

2.2 Enclosure Interlocking.


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When required by 5.3.1.4 , each disconnecting means mounted within or adjacent to a control enclosurethat contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically orelectrically interlocked, or both, with the control enclosure doors so that none of the doors open unless thepower is disconnected. Interlocking shall be reactivated automatically when all the doors are closed.

Exception No. 1: A disconnecting means used only for maintenance lighting circuits within controlenclosures shall not be required to be interlocked with the control enclosure. A safety sign shall beprovided that meets the requirements of 16.2.4 .

Exception No. 2: A disconnecting means used for power supply circuits within control enclosures tomemory elements and their support logic requiring power at all times to maintain information storageshall not be required to be interlocked with the control enclosure doors. A safety sign shall be providedthat meets the requirements of 16.2.4 .

6.2.

4

2 . 3. 1 *

Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gainaccess without removing power.

6.2.

4

2 . 3. 2

The interlocking means shall meet the following requirements:

(1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons todefeat the interlock

(2) Be reactivated automatically when the door(s) is closed

(3) Prevent closing of the disconnecting means while the door of the enclosure containing thedisconnect is open, unless an interlock is operated by deliberate action

6.2.

4

2 .3 .3

Where provided with a defeat mechanism as permitted in 6.2.4.2 (1), live parts mounted on the inside ofdoors that are operating at over 50 volts shall be protected from unintentional direct contact by the inherentdesign of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere cannotcontact any of the live parts in question.

6.2.

5

2.4 Enclosure Access.

When a qualified person, using appropriate work practices, needs to enter an enclosure that does not havea disconnect, one of the following conditions shall be met:

(1) The use of a key or tool shall be required for opening the enclosure.

(2) An enclosure door shall be permitted to be opened without the use of a key or a tool and withoutdisconnection of live parts only when all live parts inside are separately enclosed or guarded such thatthere cannot be any direct contact with live parts.


Section 6.2 contains two main sub-sections 6.2.1 (protection by insulation) and 6.2.2 (protection by enclosures). The current sub-section numbering does not show the enclosure requirements as part of the 6.2.2 sub-section. The correction places all enclosure related requirements under the 6.2.2 sub-section.


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Street Address:

City:

State:

Zip:


Committee Statement







Annex





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6.2.3 * Direct Contact from Outside an Enclosure.

Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A,ANSI/UL 50, or NEMA 250. (See Figure 6.2.3 .)


Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure asprotection from electrical shock shall be determined by using a test finger as described in Annex AFigure 6.2.3 . The test finger shall be applied, with only minimal force, in every opening in the enclosureafter removal of all parts of the enclosure that are capable of being removed without the use of a tool. Thetest finger shall not encounter live parts in any direction.


Delete the Figure in 6.2.3 and relocate it to Annex A in *6.2.3 as it is more appropriate for fabricating a finger that what needs to be in the body of the document.




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Committee Statement

Resolution: Figure 6.2.3 was retained as normative requirement and cannot be located in an informative annex.The regulations governing the the development of NFPA Standards do not permit requiringcompliance with annex material,


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Public Input No. 191-NFPA 79-2016 [ Section No. 6.2.4 [Excluding any Sub-Sections] ]

When required by 5.3.1.4, each disconnecting means mounted within or adjacent to a control enclosurethat contains uninsulated live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall bemechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doorsopen unless the power is disconnected. Interlocking shall be reactivated automatically when all the doorsare closed.

Exception No. 1: A disconnecting means used only for maintenance lighting circuits within controlenclosures shall not be required to be interlocked with the control enclosure. A safety sign shall beprovided that meets the requirements of 16.2.4.

Exception No. 2: A disconnecting means used for power supply circuits within control enclosures tomemory elements and their support logic requiring power at all times to maintain information storage shallnot be required to be interlocked with the control enclosure doors. A safety sign shall be provided thatmeets the requirements of 16.2.4.


Adding the term “uninsulated” as recommended with bring consistency with 66.1.2 in UL 508A which requires the door to be interlocked with the disconnecting means where the door gives access to uninsulated live parts operating at 50 volts ac or 60 volts dc or more.




Street Address:

City:

State:

Zip:


Committee Statement

Resolution: The intent of 6.2.4 is to require interlocks as a primary option. Exceptions provide alternatives whenthere are equivalent safety features. UL 508A is based on requirements found in NFPA 79. If it ismisworded, correlation responsibility is with the UL standard.


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Public Input No. 95-NFPA 79-2015 [ Section No. 6.2.4 [Excluding any Sub-Sections] ]

When required by 5.3.1.4 , each disconnecting means mounted within or adjacent to a control enclosurethat contains live exposed parts operating at 50 volts ac (rms value) or 60 volts dc or more shall bemechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doorsopen unless the power is disconnected. Interlocking shall be reactivated automatically when all the doorsare closed.

Exception No. 1: A disconnecting means used only for maintenance lighting circuits within controlenclosures shall not be required to be interlocked with the control enclosure. A safety sign shall beprovided that meets the requirements of 16.2.4 .

Exception No. 2: A disconnecting means used for power supply circuits within control enclosures tomemory elements and their support logic requiring power at all times to maintain information storage shallnot be required to be interlocked with the control enclosure doors. A safety sign shall be provided thatmeets the requirements of 16.2.4 .


Adding the term "exposed" would further clarify the requirement related to section 6 - protection from electrical hazards. Control panel designs which eliminate the exposure to electrical hazards shall not be required to satisfy 6.2.4.




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Committee Statement

Resolution: By the definition of “exposed,” enclosed parts are not exposed. So, the live parts would be exposedonly when the door is open, not all the time. See action taken and statement on PI 191.


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6.2.4.3

Where provided with a defeat mechanism as permitted in 6.2.4.2 (1), live parts mounted on the inside ofdoors (as well as other live parts inside the enclosure) that are operating at over 50 volts shall be protectedfrom unintentional direct contact by the inherent design of components or the application of barriers orobstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question.



PC_18_HELD.pdf PC 18 - Held


Note: This Public Input originated as Public Comment No. 18 and was reported at as "Reject but Hold" in the F2014 Second Draft Report for NFPA 79, per the Regs at 4.4.8.3.1.

Submitter's Substantiation: This section only includes components on a door but excludes other components in the cabinet and it is not tied to section 6.2 clearly.


Submitter Full Name: TC on EEI-AAA

Organization: NFPA

Street Address:

City:

State:

Zip:


Committee Statement

Resolution: The requirement in 6.2.4.3 is intended only for live parts mounted on the inside of the door. Nosubstantiation has been provided to require all live parts operating over 50 volts in an enclosure to beguarded to the same degree of protection. Hazards associated with live parts mounted inside theenclosure are addressed elsewhere in this section.


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8/27/13 TerraView™

submittals.nfpa.org/TerraViewWeb/ViewerPage.jsp 9/41

Public Comment No. 18-NFPA 79-2013 [ Section No. 6.2.4.3 ]

6.2.4.3

Where provided with a defeat mechanism as permitted in 6.2.4.2 (1), live parts mounted on the inside of doors (as well as other live parts inside theenclosure) that are operating at over 50 volts shall be protected from unintentional direct contact by the inherent design of components or the application ofbarriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question.

Statement of Problem and Substantiation for Public Comment

This section only includes components on a door but excludes other components in the cabinet and it is not tied to section 6.2 clearly.


Submitter Full Name:RICHARD TRAINOR

Organization: TUV SUD AMERICA

Street Address:

City:

State:

Zip:

Submittal Date: Fri Apr 26 15:26:52 EDT 2013

Committee Statement

Committee Action: Rejected but held

Resolution: There is no link to a PI, or FR therefore this is new material.

Copyright Assignment

I, RICHARD TRAINOR, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Comment (including both the Proposed

Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in w hich this Public

Comment in this or another similar or derivative form is used. I hereby w arrant that I am the author of this Public Comment and that I have full pow er and authority to enter into this copyright

assignment.

By checking this box I aff irm that I am RICHARD TRAINOR, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and

intend that, by checking this box, I am creating an electronic signature that w ill, upon my submission of this form, have the same legal force and effect as a handw ritten signature

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6.4 Protection by the Use of Protective Extra Low Voltage (PELV) or Class 2 Circuits .


The use of PELV, as described in Section 6.4, is to protect persons against electric shock from indirectcontact and limited area direct contact. Class 2 circuits as covered in NEC Article 725 shall be permitted tobe used to provide protection from electric shock and other hazards.

6.4.2

PELV circuits shall satisfy all of the following conditions:

(1) The nominal voltage shall not exceed the following:

(2) 30 volts ac (rms value) or 60 volts dc (ripple-free) when the equipment is used in normally drylocations and when large area contact of live parts with the human body is not expected

(3) 6 volts ac (rms value) or 15 volts dc (ripple-free) in all other cases

(4) One side of the circuit or one point of the source of the supply of that circuit shall be connected to theequipment grounding circuit.

(5) Live parts of PELV circuits shall be electrically separated from other live circuits. Electrical separationshall be not less than that required between the primary and secondary circuits of a safety isolatingtransformer.

(6) Conductors of each PELV circuit shall be physically separated from those of any other circuit. Whenthis requirement is impracticable, the insulation provisions of 13.1.3 shall apply.

(7) Attachment plugs and receptacles (plugs and socket combinations) for a PELV circuit shall conform tothe following:

(8) Attachment plugs (plugs) shall not be able to enter receptacles (socket-outlets) of other voltagesystems.

(9) Receptacles (socket-outlets) shall not admit plugs of other voltage systems.

6.4.3 Sources for PELV.

The source for PELV shall be one of the following:

(1) A safety isolating transformer

(2) A source of current providing a degree of safety equivalent to that of the safety isolating transformer(e.g., a motor generator with winding providing equivalent isolation)

(3) An electrochemical source (e.g., a battery) or another source independent of a higher voltage circuit(e.g., a diesel-driven generator)

(4) An identified electronic power supply conforming to standards specifying measures to be taken toensure that, even in the case of an internal fault, the voltage at the outgoing terminals does notexceed the values specified in 6.4.2 (1)


Class 2 circuits should be included as a means of providing protection.




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Street Address:

City:

State:

Zip:


Committee Statement







Annex





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6.7 (NEW) Protection From Contrary Control Circuit Short

Control equipment or controllers which can create an electrical hazard when actuated or engaged at thesame time (e.g. Reversing or Wye-Delta start), shall be both mechanically and electrically interlocked, toprevent hazardous simultaneous actuation.


Actuation of Wye-Delta configured components, without interlocking can create a short between A and C Phases, resulting in an electrical hazard and possibly and Arc Flash event. Manual actuation of contactors is common with troubleshooting.




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Committee Statement

Resolution: Mechanical interlocks will not prevent an accident if the interlocks are defeated. Only qualifiedpersons are allowed to troubleshoot and should be aware of the hazards associated with Wye-Deltaconfigured components. This is not a shock related hazard and it should be addressed in Chapter 9.Requirement for reverse interlocking type controllers are found in 9.3.4.2


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7.2.1.4

A circuit breaker, self-protected combination motor controller, or a manual motor controller suitable as tapconductor protection in group installations, or othe devices (i.e.: frequency motor controller (inverter))marked with a slash rating, such as 120/240V or 480Y/277V, shall be applied in a solidly grounded circuitwhere the nominal voltage of any conductor to ground does not exceed the lower voltage rating and thenominal voltage between any two conductors does not exceed the higher voltage rating. When slash-rateddevices are connected to the supply circuit of the machine, the nameplate voltage rating in 16.4.1 (3) shallnot exceed the lower voltage rating or shall include the complete slash rating. When slash rated devices areconnected to the secondary of a transformer forming part the electrical equipment of the machine, thetransformer secondary shall be grounded such that the line-to-line voltage for each phase and voltage toground for any pole do not exceed the respective slash ratings.


Limiting the devices that need to be considered to be powered by "grounded" circuit where applied nominal voltage to ground rating of the device is exceeded.




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Committee Statement

Resolution: This section for overcurrent protection and any specific component rating requirements may be bettersuited for Chapter 4.


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Public Input No. 98-NFPA 79-2015 [ Section No. 7.2.4.2.2 ]

7.2.4.2.2

Control circuit conductors

sizes

of

18, 16, and

14 AWG shall be considered as protected by an overcurrent device(s) of not more than a 20-ampererating.


Delete 18 and 16 AWG from the text; permitting 20 amperes of current goes against the known continuous ampacities of these conductors.

Otherwise, add explanatory material for this sub-section.




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Submittal Date: Sun Dec 27 20:23:17 EST 2015

Committee Statement

Resolution: There is no substantiation provided for deletions of 18-16 AWG conductors from this section. Controlcircuits are protected by design for overload and short circuit protection is provided for protection ofconductors.


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7.2.10 Rating and Setting of Overcurrent Protective Devices. Motor controllers shall be provided inaccordance with Article 430, Part VII, of NFPA 70.

7.2.10.1*


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Each motor controller and its associated wiring shall be protected as an individual branch circuit by a short-circuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating of thedesignated SCPD shall be as shown in Table 7.2.10.1.

Table 7.2.10.1 Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, andMotor Controller

Fuse Class with Non–Time DelayFull-Load Current (%)

AC-2 AC-3 AC-4

R 300 300 300

CF or J 300 300 300

CC 300 300 300

T 300 300 300

Type of Application2

Fuse Class with Time Delay1 AC-2 AC-3 AC-4

RK-53 150 175 175

RK-1 150 175 175

CF or J 150 175 225

CC 150 300 300

Instantaneous trip circuit breaker4 800 800 800

Inverse trip circuit breaker5 150 250 250

Note: Where the values determined by this table do not correspond to the standard sizes or ratings, thenext higher standard size, rating, or possible setting shall be permitted.

1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for thestarting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed225 percent. The rating of a time-delay Class CC fuse and non–time-delay Class CC, J, CF, or T fuse shallbe permitted to be increased but shall in no case exceed 400 percent of the full-load current.

2 Types of starting duty are as follows:

(a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off.

(b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off whilerunning, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10operations per 10 minutes and all wye-delta and two-step autotransformer starting motors.

(c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching,jogging.

3Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only withNEMA-rated motor controllers.

4Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of thefollowing:

(a) They are adjustable.

(b) Part of a combination controller has motor-running protection and also short-circuit and ground-faultprotection in each conductor.

(c) The combination is especially identified for use.

(d) It is installed per any instructions included in its listing or labeling.

(e) They are limited to single motor applications, circuit breakers with adjustable trip settings shall be setat the controller manufacturer's recommendation, but not greater than 1300 percent of the motor full-loadcurrent.

5Where the rating of an inverse time circuit breaker specified in this table is not sufficient for the starting


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current of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-loadcurrents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes.

Exception: Table 7.2.10.1 shall not apply to Design B energy efficient motor circuits. The provisions ofNFPA 70 shall be observed for Design B energy efficient motor circuits.

7.2.10.1.1

A listed self-protected combination controller shall be permitted in lieu of the devices specified in Table7.2.10.1 for branch circuit and overload protection of a single motor circuit.

7.2.10.1.2

Where a listed self-protected combination controller has an adjustable, instantaneous trip setting, thesetting shall not exceed 1300 percent of full-load motor current for other than Design B energy efficientmotors and not more than 1700 percent of full-load motor current for Design B energy efficient motors.

7.2.10.2

Several motors, each not exceeding 1 hp in rating, shall be permitted on a nominal 120-volt branch circuitprotected at not over 20 amperes or a 600-volt nominal or less branch circuit, protected at not over 15amperes, where all of the following conditions are met:

(1) The full-load rating of each motor does not exceed 6 amperes.

(2) The rating of the branch-circuit short-circuit and ground-fault protective device marked on any of thecontrollers is not exceeded. The short-circuit and ground-fault protection is provided by a singleinverse time circuit breaker or single set of fuses.

(3) Individual overload protection conforms to Section 7.3.

7.2.10.3

Where the branch-circuit short-circuit and ground-fault protective device is selected not to exceed thatallowed by 7.2.10.1 for the smallest rated motor, two or more motors or one or more motors and otherload(s), with each motor having individual overload protection, shall be permitted to be connected to abranch circuit where it can be determined that the branch-circuit short-circuit and ground-fault protectivedevice will not open under severe normal conditions of service that might be encountered. The short-circuitand ground-fault protection shall be provided by a single inverse time circuit breaker or single set of fuses.


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7.2.10.4

Two or more motors or one or more motor(s) and other load(s), and their control equipment shall bepermitted to be connected to a single branch circuit where short-circuit and ground-fault protection isprovided by a single inverse time circuit breaker or a single set of fuses, provided the following conditionsunder (1) and either (2) or (3) are met:

(1) Each motor controller and overload device is either listed for group installation with specifiedmaximum branch-circuit protection or selected such that the ampere rating of the motor branch short-circuit and ground-fault protective device does not exceed that permitted by 7.2.10.1 for that individualmotor controller or overload device and corresponding motor load.

(2) The rating or setting of the branch short-circuit and ground-fault protection device does not exceedthe values in Table 7.2.10.4 for the smallest conductor in the circuit.

(3) The rating or setting of the branch short-circuit and ground-fault protection does not exceed the valuespecified in 7.2.10.1 for the highest rated motor connected to the branch circuit plus an amount equalto the sum of the full-load current ratings of all other motors and the ratings of other loads connectedto the circuit. Where this calculation results in a rating less than the ampacity of the branch circuitconductors, it shall be permitted to increase the maximum rating of the fuses or circuit breaker to avalue not exceeding that permitted by Sections 12.5 and 12.6. Overcurrent protection for loads otherthan motor loads shall be in accordance with 7.2.3, 7.2.4, and 7.2.11. Where 16 AWG or 18 AWGconductors are used for branch circuit conductors or tap conductors under 7.2.10.5, the rating andtype of the branch short-circuit and ground-fault protection shall be in accordance with 12.6.1.

Table 7.2.10.4 Relationship Between Conductor Size and Maximum Rating or Setting of Short-CircuitProtective Device for Power Circuits Group Installations

Conductor Size

(AWG)

Maximum Rating

Fuse or Inverse Time*

Circuit Breaker

(amperes)

18 See footnote.

16 See footnote.

14 60

12 80

10 100

8 150

6 200

4 250

3 300

2 350

1 400

0 500

2/0 600

3/0 700

4/0 800

*Maximum ratings and type of branch short-circuit and ground-fault protective devices for 16 AWG and18 AWG shall be determined in accordance with 12.6.1.


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7.2.10.5

For group installations described in 7.2.10.4 (3), the conductors of any tap supplying a single motor shallnot be required to have an individual branch-circuit short-circuit and ground-fault protective device, providedthey comply with one of the following:

(1) No conductor to the motor shall have an ampacity less than that of the branch-circuit conductors.

(2) No conductor to the motor shall have an ampacity less than one-third that of the branch-circuitconductors, with a minimum in accordance with Sections 12.5 and 12.6, the conductors to the motoroverload device being not more than 7.5 m (25 ft) long and being suitably protected from physicaldamage in accordance with Chapter 13.

(3) Conductors from the branch-circuit short-circuit and ground-fault protective device to a listed manualmotor controller additionally marked “Suitable for Tap Conductor Protection in Group Installations” orto a branch circuit protective device shall be permitted to have an ampacity not less than 1/10 therating or setting of the branch-circuit short-circuit and ground-fault protective device. The conductorsfrom the controller to the motor shall have an ampacity in accordance with Sections 12.5 and 12.6.The conductors from the branch-circuit short-circuit and ground-fault protective device to the controllershall (1) be enclosed either by an enclosed controller or by a raceway and be not more than 3 m(10 ft) long or (2) have an ampacity not less than that of the branch-circuit conductors.



PC_44.pdfPC 44 Held



Submitter's Substantiation: Transformers and overload device requirements are provided with references to the NEC. A similar requirement should be included for motor controllers.



Organization: NFPA

Street Address:

City:

State:

Zip:


Committee Statement

Resolution: Requirements for sizing motor controllers would be more appropriate for Chapter 14.


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Page 73 of 176



Public Comment No. 43-NFPA 79-2013 [ Section No. 5.3.1.1 ]

5.3.1.1

A supply circuit disconnecting means shall be provided for the following:

(1) Each incoming supply circuit to a machine

(2) The supply circuit to a feeder system using collector wires, collector bars, slip-ring assemblies, or flexible cable systems (reeled, festooned) to amachine or a number of machines

(3) Each on-board power source (e.g., generators, uninterruptible power supplies)

Exception:

Communication and remote control and signaling circuits of less than 50 volts shall not be required to be provided with a supply circuit disconnectingmeans.

5.3.1.1.1 *

Each disconnecting means required by 5.3.1.1 shall be legibly marked to indicate the equipment it disconnects.

5.3.1.1.2

Where a machine is supplied by more than one supply circuit, a marking shall be installed at each supply circuit disconnect location denoting the locationof all other supply circuit disconnects.



NFPA79sect5311.docx Cover Sheet


Section 5.1.1 includes "electronic circuits" in the description. It is not necessary or practical to include a disconnecting means for these limited energy circuits. This comment is submitted based on the committee statement on PI 81.


Submitter Full Name:Paul Dobrowsky

Organization:

Street Address:

City:

State:

Zip:

Submittal Date: Wed May 08 11:38:34 EDT 2013

Committee Statement

CommitteeAction:

Accepted

Resolution: SR-7-NFPA 79-2013

Statement: It is not necessary or practical to include a disconnecting means for limited energy circuits. This comment is submitted based on the committeestatement on PI 81. See Article 725 and 800 in the NEC for an explanation of remote control and communication circuits respectively.


I, Paul Dobrow sky, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Comment (including both the Proposed



assignment.

By checking this box I aff irm that I am Paul Dobrow sky, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and


Public Comment No. 44-NFPA 79-2013 [ Section No. 7.2.10 ]

7.2.10 Rating and Setting of Overcurrent Protective Devices. Motor controllers shall be provided in accordance with Article 430, Part VII of NFPA 70.

7.2.10.1 *

Page 74 of 176



Each motor controller and its associated wiring shall be protected as an individual branch circuit by a short-circuit protective device (SCPD) as specifiedby the controller manufacturer. The maximum rating of the designated SCPD shall be as shown in Table 7.2.10.1 .

Table 7.2.10.1 Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, and Motor Controller


AC-2 AC-3 AC-4

R 300 300 300

J 300 300 300

CC 300 300 300

T 300 300 300

Type 2 of Application

Fuse Class with Time Delay 1 AC-2 AC-3 AC-4

RK-5 3 150 175 175

RK-1 150 175 175

J 150 175 225

CC 150 300 300

Instantaneous trip circuit breaker 4 800 800 800

Inverse trip circuit breaker 5 150 250 250

Note: Where the values determined by Table 7.2.10.1 do not correspond to the standard sizes or ratings, the next higher standard size, rating, or possiblesetting shall be permitted.

1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for the starting of the motor, it shall be permitted to beincreased but shall in no case be permitted to exceed 225 percent. The rating of a time-delay Class CC fuse and non–time-delay Class CC, J, or T fuseshall be permitted to be increased but shall in no case exceed 400 percent of the full-load current.


?(a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off.

?(b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off while running, occasional inching, jogging, or pluggingbut not to exceed 5 operations per minute or 10 operations per 10 minutes and all wye-delta and two-step autotransformer starting motors.

?(c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching, jogging.

3 Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only with NEMA-rated motor controllers.

4 Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of the following:

?(a) They are adjustable.

?(b) Part of a combination controller has motor-running protection and also short-circuit and ground-fault protection in each conductor.

?(c) The combination is especially identified for use.

?(d) It is installed per any instructions included in its listing or labeling.

?(e) They are limited to single motor applications, circuit breakers with adjustable trip settings shall be set at the controller manufacturer'srecommendation, but not greater than 1300 percent of the motor full-load current.

5 Where the rating of an inverse time circuit breaker specified in Table 7.2.10.1 is not sufficient for the starting current of the motor, it shall be permitted tobe increased but in no case exceed 400 percent for full-load currents of 100 amperes or less or 300 percent for full-load currents greater than 100amperes.

Exception : Table 7.2.10.1 shall not apply to Design B energy efficient motor circuits. The provisions of NFPA 70 , shall be observed for Design Benergy efficient motor circuits.

7.2.10.1.1

A listed self-protected combination controller shall be permitted in lieu of the devices specified in Table 7.2.10.1 for branch circuit and overload protectionof a single motor circuit.

7.2.10.1.2

Where a listed self-protected combination controller has an adjustable, instantaneous trip setting, the setting shall not exceed 1300 percent of full-loadmotor current for other than Design B energy efficient motors and not more than 1700 percent of full-load motor current for Design B energy efficientmotors.

7.2.10.2

Several motors, each not exceeding 1 hp in rating, shall be permitted on a nominal 120-volt branch circuit protected at not over 20 amperes or a 600-voltnominal or less branch circuit, protected at not over 15 amperes, where all of the following conditions are met:

(1) The full-load rating of each motor does not exceed 6 amperes.

(2) The rating of the branch-circuit short-circuit and ground-fault protective device marked on any of the controllers is not exceeded. The short-circuitand ground-fault protection is provided by a single inverse time circuit breaker or single set of fuses.

(3) Individual overload protection conforms to Section 7.3 .

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7.2.10.3

Where the branch-circuit short-circuit and ground-fault protective device is selected not to exceed that allowed by 7.2.10.1 for the smallest rated motor,two or more motors or one or more motors and other load(s), with each motor having individual overload protection, shall be permitted to be connected toa branch circuit where it can be determined that the branch-circuit short-circuit and ground-fault protective device will not open under severe normalconditions of service that might be encountered. The short-circuit and ground-fault protection is provided by a single inverse time circuit breaker or singleset of fuses.

7.2.10.4

Two or more motors or one or more motor(s) and other load(s), and their control equipment shall be permitted to be connected to a single branch circuitwhere short-circuit and ground-fault protection is provided by a single inverse time circuit breaker or a single set of fuses, provided the followingconditions under (1) and either (2) or (3) are met:

(1) Each motor controller and overload device is either listed for group installation with specified maximum branch-circuit protection or selected suchthat the ampere rating of the motor branch short-circuit and ground-fault protective device does not exceed that permitted by 7.2.10.1 for thatindividual motor controller or overload device and corresponding motor load.

(2) The rating or setting of the branch short-circuit and ground-fault protection device does not exceed the values in Table 7.2.10.4 for the smallestconductor in the circuit.

(3) The rating or setting of the branch short-circuit and ground-fault protection does not exceed the value specified in 7.2.10.1 for the highest ratedmotor connected to the branch circuit plus an amount equal to the sum of the full-load current ratings of all other motors and the ratings of otherloads connected to the circuit. Where this calculation results in a rating less than the ampacity of the branch circuit conductors, it shall bepermitted to increase the maximum rating of the fuses or circuit breaker to a value not exceeding that permitted by Sections 12.5 and 12.6 .Overcurrent protection for loads other than motor loads shall be in accordance with 7.2.3 , 7.2.4 , and 7.2.11 . Where 16 AWG or 18 AWGconductors are used for branch circuit conductors or tap conductors under 7.2.10.5 , the rating and type of the branch short-circuit and ground-fault protection shall be in accordance with 12.6.1 .

Table 7.2.10.4 Relationship Between Conductor Size and Maximum Rating or Setting of Short-Circuit Protective Device for Power Circuits GroupInstallations

Conductor Size

(AWG)

Maximum Rating Fuse or Inverse Time*

Circuit Breaker (amperes)

18 See footnote.

16 See footnote.

14 60

12 80

10 100

8 150

6 200

4 250

3 300

2 350

1 400

0 500

2/0 600

3/0 700

4/0 800

* Maximum ratings and type of branch short-circuit and ground-fault protective devices for 16 AWG and 18 AWG shall be determined in accordancewith 12.6.1.

7.2.10.5

For group installations described in 7.2.10.4 (3), the conductors of any tap supplying a single motor shall not be required to have an individual branch-circuit short-circuit and ground-fault protective device, provided they comply with one of the following:


(2) No conductor to the motor shall have an ampacity less than one-third that of the branch-circuit conductors, with a minimum in accordance withSections 12.5 and 12.6 , the conductors to the motor overload device being not more than 7.5 m (25 ft) long and being suitably protected fromphysical damage in accordance with Chapter 13 .

(3) Conductors from the branch-circuit short-circuit and ground-fault protective device to a listed manual motor controller additionally marked “Suitablefor Tap Conductor Protection in Group Installations” or to a branch circuit protective device shall be permitted to have an ampacity not less than1/10 the rating or setting of the branch-circuit short-circuit and ground-fault protective device. The conductors from the controller to the motor shallhave an ampacity in accordance with Sections 12.5 and 12.6 . The conductors from the branch-circuit short-circuit and ground-fault protectivedevice to the controller shall (1) be enclosed either by an enclosed controller or by a raceway and be not more than 3 m (10 ft) long or (2) have anampacity not less than that of the branch-circuit conductors.



NFPA79sect7210.docx Cover Sheet


Transformers and overload device requirements are provided with references to the NEC. A similar requirement should be included for motor controllers.


Page 76 of 176





Street Address:

City:

State:

Zip:

Submittal Date: Wed May 08 12:24:26 EDT 2013

Committee Statement

CommitteeAction:

Rejected but held

Resolution: There was no link to a PI. The submitter linked the comment to FR-103 which was related to transformers and overload devices. This comment isrelated to motor controllers and therefore is considered new material.





assignment.




3.3.33 * Duct.

An enclosed channel designed expressly for holding and protecting electrical conductors, cables, and busbars.



NFPA79sectA3332.docx Cover Sheet


The term "Raceway" is defined and is the correct term. Adding information in the proposed annex related to the term "duct" is appropriate.




Street Address:

City:

State:

Zip:

Submittal Date: Thu May 09 10:08:13 EDT 2013

Committee Statement

CommitteeAction:

Rejected

Resolution: FR-95, The concept has merit; however, the submitter does not address all instances of use of duct especially when not in a parentheticalreference in the standard.





assignment.



Page 77 of 176

Public Input No. 164-NFPA 79-2016 [ Section No. 7.2.10.1 [Excluding any Sub-Sections]

]


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Each motor controller and its associated wiring shall be protected as an individual branch circuit by a short-circuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating of thedesignated SCPD shall be as shown in Table 7.2.10.1.

Table 7.2.10.1 Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, andMotor Controller


AC-2 AC-3 AC-4

R 300 300 300

CF or J 300 300 300

CC 300 300 300

T 300 300 300

Type of Application2

Fuse Class with Time Delay1 AC-2 AC-3 AC-4

RK-53 150 175 175

RK-1 150 175 175

CF or J 150 175 225

CC 150 300 300

Instantaneous trip circuit breaker4 800 800 800

Inverse trip circuit breaker5 150 250 250

Note: Where the values determined by this table do not correspond to the standard sizes or ratings, the nexthigher standard size, rating, or possible setting shall be permitted.

1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for thestarting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed225 percent. The rating of a time-delay Class CC fuse and non–time-delay Class CC, J, CF, or T fuse shallbe permitted to be increased but shall in no case exceed 400 percent of the full-load current.


(a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off.

(b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off whilerunning, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10 operationsper 10 minutes and all wye-delta and two-step autotransformer starting motors.

(c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching,jogging.

3Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only withNEMA-rated motor controllers.

4Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of the following:

(a) They are adjustable.

(b) Part of a combination controller has motor-running protection and also short-circuit and ground-faultprotection in each conductor.

(c) The combination is especially identified for use.

(d) It is installed per any instructions included in its listing or labeling.

(e) They are limited to single motor applications, circuit breakers with adjustable trip settings shall be setat the controller manufacturer's recommendation, but not greater than 1300 percent of the motor full-loadcurrent.

5Where the rating of an inverse time circuit breaker specified in this table is not sufficient for the startingcurrent of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-load


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currents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes.

Exception No. 1 : Table 7.2.10.1 shall not apply to Design B energy efficient motor circuits. The provisionsof NFPA 70 shall be observed for Design B energy efficient motor circuits.

Exception No. 2 – Where the controller is a drive marked “Suitable for Output Conductor Protection”, themaximum rating of the designated SCPD shall be determined by replacing the full-load current in Table7.2.10.1 with the drive’s rated input current.


Drive technology is capable of providing output conductor short-circuit and ground-fault protection. There is a UL 61800-5-1 task group developing requirements to investigate and mark a drive for protecting its output conductors in individual-motor and group installations. This change permits the use of such a drive to decouple the output conductor sizing from the branch circuit protective device sizing. This proposal is related to the proposed change to 7.2.10.4(2).





Submitter Full Name: Roger Plemmons


Street Address:

City:

State:

Zip:


Committee Statement


Statement: Drive technology is capable of providing output conductor short-circuit and ground-fault protection.There is a UL 61800-5-1 task group developing requirements to investigate and mark a drive forprotecting its output conductors in individual-motor and group installations. This change permits theuse of such a drive to decouple the output conductor sizing from the branch circuit protective devicesizing. This proposal is related to the proposed change to 7.2.10.4(2).


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7.2.10.4

Two or more motors or one or more motor(s) and other load(s), and their control equipment shall bepermitted to be connected to a single branch circuit where short-circuit and ground-fault protection isprovided by a single inverse time circuit breaker or a single set of fuses, provided the following conditionsunder (1) and either (2) or (3) are met:

(1) Each motor controller and overload device is either listed for group installation with specifiedmaximum branch-circuit protection or selected such that the ampere rating of the motor branch short-circuit and ground-fault protective device does not exceed that permitted by 7.2.10.1 for that individualmotor controller or overload device and corresponding motor load.

(2) The rating or setting of the branch short-circuit and ground-fault protection device does not exceedthe values in Table 7.2.10.4 for the smallest conductor in the circuit.

Exception: Where a controller is a drive marked “Suitable for Output Conductor Protection”, theconductors from the drive to the motor shall not apply to determining the smallest conductor inthe circuit. The conductors from the drive to the motor shall have an ampacity in accordancewith Sections 12.5 and 12.6.

(3) The rating or setting of the branch short-circuit and ground-fault protection does not exceed thevalue specified in 7.2.10.1 for the highest rated motor connected to the branch circuit plus an amountequal to the sum of the full-load current ratings of all other motors and the ratings of other loadsconnected to the circuit. Where this calculation results in a rating less than the ampacity of the branchcircuit conductors, it shall be permitted to increase the maximum rating of the fuses or circuit breakerto a value not exceeding that permitted by Sections 12.5 and 12.6. Overcurrent protection for loadsother than motor loads shall be in accordance with 7.2.3, 7.2.4, and 7.2.11. Where 16 AWG or18 AWG conductors are used for branch circuit conductors or tap conductors under 7.2.10.5, therating and type of the branch short-circuit and ground-fault protection shall be in accordance with12.6.1.

Table 7.2.10.4 Relationship Between Conductor Size and Maximum Rating or Setting of Short-CircuitProtective Device for Power Circuits Group Installations

Conductor Size

(AWG)

Maximum Rating

Fuse or Inverse Time*

Circuit Breaker

(amperes)

18 See footnote.

16 See footnote.

14 60

12 80

10 100

8 150

6 200

4 250

3 300

2 350

1 400

0 500

2/0 600

3/0 700

4/0 800

*Maximum ratings and type of branch short-circuit and ground-fault protective devices for 16 AWG and18 AWG shall be determined in accordance with 12.6.1.


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Page 82 of 176


Drive technology is capable of providing output conductor short-circuit and ground-fault protection. There is a UL 61800-5-1 task group developing requirements to investigate and mark a drive for protecting its output conductors in individual-motor and group installations. This change permits the use of such a drive to decouple the output conductor sizing from the branch circuit protective device sizing. This proposal is related to the proposed change to 7.2.10.1.



Public Input No. 164-NFPA 79-2016 [Section No. 7.2.10.1 [Excluding any Sub-Sections]]




Street Address:

City:

State:

Zip:


Committee Statement


Statement: The listing requirement was added to ensure products were evaluated to the product standard. Thetext was reformatted for clarity.


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7.2.10.5

For group installations described in 7.2.10.4 (3), the conductors of any tap supplying a single motor shallnot be required to have an individual branch-circuit short-circuit and ground-fault protective device, providedthey comply with one of the following:


(2) No conductor to the motor shall have an ampacity less than one-third that of the branch-circuitconductors, with a minimum in accordance with Sections 12.5 and 12.6, the conductors to the motoroverload device being not more than 7.5 m (25 ft) long and being suitably protected from physicaldamage in accordance with Chapter 13.

(3) Conductors from the point of the tap from the branch - circuit short-circuit and ground-fault protectivedevice to a listed manual motor controller additionally marked “Suitable for Tap Conductor Protectionin Group Installations” or to a branch circuit protective device shall be permitted to have an ampacitynot less than 1/10 the rating or setting of the branch-circuit short-circuit and ground-fault protectivedevice. The conductors from the controller to the motor shall have an ampacity in accordance withSections 12.5 and 12.6. The conductors from the branch-circuit short-circuit and ground-faultprotective device point of the tap to the controller shall (1) be enclosed either by an enclosedcontroller or by a raceway and be not more than 3 m (10 ft) long or (2) have an ampacity not less thanthat of the branch-circuit conductors.


These changes are Intended to correlate with the NEC’s 430.53(D)(3). The third sentence’s change makes it consistent with the NEC’s 430.53(D)(3). The first sentence’s change makes the first sentence consistent with the third and is the same as an accepted change to the 2017 NEC.




Street Address:

City:

State:

Zip:


Committee Statement

Resolution: It will be improper to make changes based on 2017 edition of the NEC as it has not been approved bySC for issue and use. NFPA 79 FD should reflect consistency with the published NEC. This can beresubmitted and considered during the comments period if NEC 2017 is issued and contains thesuggested changes .


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Grounding and Bonding


The concepts in Chapter 8 apply to bonding as much as or more so than grounding. The title would match that used in the NEC for Article 250.




Street Address:

City:

State:

Zip:


Committee Statement


Statement: The concepts in Chapter 8 apply to bonding as much as or more so than grounding. The title wouldmatch that used in the NEC for Article 250.


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8.2 Equipment Grounding Circuit Conductors and Bonding Jumpers .

8.2.1 Grounding Circuit Parts.

The equipment grounding circuit shall consist of the following:

Equipment grounding conductor terminal(s)

Equipment grounding conductors and equipment bonding jumpers machine and all exposed, non-current-carrying conductive parts, material, and equipment likely to be energized shall be connected to anequpment grounding conductor or bonding jumper.

Exception: Small parts such as screws, rivets, and nameplates that are not likely to become energizedshall not be required to be connected to an equpment grounding conductor or bonding jumper.

8.2.1.1 Grounding Circuit Stress. Effective Ground Fault Current Path

All parts of the equipment grounding circuit effective ground fault current path shall be capable ofwithstanding the highest thermal and mechanical stress that can be caused by fault currents flowing in thatpart of the circuit. All exposed conductive parts of the electrical equipment and the machine(s) shall beconnected to the equipment grounding circuit.

Exception: Small parts such as screws, rivets, and nameplates that are not likely to become energizedshall not be required to be grounded.

8.2.1.2 Equipment Grounding and Bonding .

The machine and all exposed, non-current-carrying conductive parts, material, and equipment likely to beenergized shall be effectively grounded connected in a manner that provides an effective ground faultcurrent path . Where electrical devices are mounted on metal mounting panels that are located withinnonmetallic enclosures, the metal mounting panels shall be effectively grounded connected to anequipment grounding conductor or bonding jumper . Where specified by the manufacturer, components andsubassemblies shall be bonded to the equipment grounding circuit in accordance with the manufacturer’sinstructions.

8.2.1.3* Equipment Grounding Conductor Terminal.

8.2.1.3.1

For each incoming supply circuit, an equipment grounding conductor terminal shall be provided in thevicinity of the associated phase conductor terminals.

8.2.1.3.2

All of the items in 8.2.1.2 shall be interconnected to the equipment grounding conductor terminal. ???

8.2.1.3.3

The equipment grounding conductor terminal shall accommodate an equipment grounding conductor sizedin accordance with Table 8.2.2.3.


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8.2.1.3.4*

The equipment grounding conductor terminal shall be identified with the word “GROUND,” the letters “GND”or “GRD,” the letter “G,” the color GREEN, or the symbol in Figure 8.2.1.3.4. In addition to the requiredmarking, the letters PE shall also be permitted to identify this terminal.

Figure 8.2.1.3.4 Grounding Symbol.

8.2.1.3.5

Where an auxiliary grounding electrode is specified, the terminal shall accommodate this additionalgrounding electrode conductor.

8.2.2 Equipment Grounding Conductors and Bonding Jumpers.

Equipment grounding conductors and bonding jumpers shall be identified in accordance with 13.2.2.

8.2.2.1

Conductors used for grounding and bonding purposes shall be copper. Stipulations on stranding and flexingas outlined in Chapter 12 shall apply.

8.2.2.2

Equipment grounding conductors and bonding jumpers shall be insulated, covered, or bare and shall beprotected against physical damage.


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8.2.2.3

Equipment grounding conductors and bonding jumpers of the wire type shall not be smaller than shown inTable 8.2.2.3, but shall not be required to be larger than the circuit conductors supplying the equipment.

Table 8.2.2.3 Minimum Size of Equipment Grounding Conductors and Bonding Jumpers

Rating or Setting of Automatic Overcurrent Device in Circuit Ahead of theEquipment

(Not Exceeding Amperes)

Copper ConductorSize

(AWG or kcmil)

10 16

15 14

20 12

30 10

40 10

60 10

100 8

200 6

300 4

400 3

500 2

600 1

800 1/0

1000 2/0

1200 3/0

1600 4/0

2000 250

2500 350

3000 400

4000 500

5000 700

6000 800

8.2.3 Continuity of the Equipment Grounding Circuit .

8.2.3.1

The continuity Continuity of the equipment grounding circuit conductors and bonding jumpers shall beensured by effective connections through conductors.

8.2.3.2

Removing a wiring device shall not interrupt the continuity of the equipment grounding circuit.

8.2.3.3

Bonding of equipment with bolts or other identified means shall be permitted if paint and dirt are removedfrom the joint surfaces or the bonded members are effectively penetrated.

8.2.3.4

Raceways, wireways, and cable trays shall not be used as equipment grounding or bonding conductors.

8.2.3.5 Doors or Covers.

8.2.3.5.1

Where electrical devices are mounted on conductive doors or covers, an equipment bonding jumper shallbe installed.


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8.2.3.5.2

Where required, an equipment bonding jumper shall connect the conductive door or cover to the equipmentenclosure or to an equipment grounding terminal within the enclosure.

8.2.3.6

Portable, pendant, and resilient-mounted equipment shall be bonded by separate conductors. Wheremulticonductor cable is used, the bonding conductor shall be included as one conductor of the cable.

8.2.4* Exclusion of Switching Devices.

The equipment grounding circuit shall not contain any switches or overcurrent protective devices.Separable connections such as those provided in drawout equipment or attachment plugs and matingconnectors and receptacles shall provide for first-make, last-break of the equipment grounding conductor.First-make, last-break shall not be required where interlocked equipment, plugs, receptacles, andconnectors preclude energization without grounding continuity.

8.2.5 Equipment Grounding Conductor Connecting Points.

8.2.5.1

All equipment grounding conductors shall be terminated in accordance with 13.1.1. The equipmentgrounding conductor connecting points shall have no other function.

8.2.5.2*

The equipment grounding conductor connecting points, other than the equipment grounding terminal, shallbe identified by the color GREEN, by the bicolor combination of GREEN-AND-YELLOW, or by use of thesymbol shown in Figure 8.2.1.3.4.


Terms used in NFPA 79 need to be the same as those in the NEC unless there is a good reason for them to be different. The term "equipment grounding circuit" was created during the development of NFPA 2002. This was based on the concept of using an industrial machine frame, instead of installing separate equipment grounding conductors or equipment bonding jumpers, to each equipment needing an effective ground fault current path. The industrial machine frame is not permitted to be used this way anymore so this term is not relevant or useful and is creating confusion. The word "wiring" was added before "device" in 8.2.3.2 to help differentiate between products such as terminals that are devices. Additional improvements can be made after the committee agrees with this change.




Street Address:

City:

State:

Zip:


Committee Statement


Statement: Grounding and bonding terms are revised to harmonize with those used in the NEC. The term"equipment grounding circuit" was created during the development of NFPA 79, 2002, but is not usedin Article 250 of NFPA 70. This was based on the concept of using an industrial machine frame,instead of installing separate equipment grounding conductors or equipment bonding jumpers toequipment needing an effective ground fault current path. The industrial machine frame is notpermitted to be used this way so this term is not relevant or useful and is creating confusion as theterm circuit typically is associated with current-carrying conductors.


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Editorial changes are incorporated for clarity and usability.

The term "incoming" was removed in front of the term "supply" to correlate with other resolutionstaken by the committee in Ch 5.


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9.1.1.4

The source of supply for all control circuits shall be taken from the load side of the supply disconnectingmeans.

Exception: The power supply circuit to memory elements and their support logic requiring power at alltimes such as PLC’s, safety PLC’s , Ethernet switches and HMI’s, inputs, non‐mo on outputs such as indicator

lights and stack lights, and displays to maintain the storage of information shall be permitted to be takenfrom the line side of the supply disconnecting means or other power source.


At present PLC’s, ethernet switches and HMI’s are assumed be covered by the existing exception. It is vital that these remain on to prevent loss of communications and data. Additionally, if power is cut it may be difficult to restart the system. For instance, if you push start and nothing happens because there is no power to the start circuit.

With regards to inputs, disconnecting the power on inputs in some cases will cause a rash of software error messages. Many customers are reluctant to allow the powering of inputs above the disconnect because of the exception does not mention it. Keeping inputs powered does not present a hazard.

Non-motion outputs and displays are usually some type of indicator and as such there is no reason to require disconnection of power to these circuits. All motion power would be disconnected by the disconnect as usual. If anything in the above the main disconnect needs to be worked on the lighting disconnect would be locked out. (safety PLC with inputs and non motion outputs).



Public Input No. 187-NFPA 79-2016 [Section No. 5.3]


Submitter Full Name: Daniel Neeser

Organization: Eaton’s Bussmann Division

Street Address:

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Committee Statement


Statement: The revised text identifies the circuits as excepted circuits and refers users to the appropriatesections for devices. Individual terms identified in the public input to be added would be covered in5.3.5.1(4) as items that are required to be energized for satisfactory operation.


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Public Input No. 168-NFPA 79-2016 [ New Section after 9.2.5.3 ]

TITLE OF NEW CONTENT Cycle Stop (Top Stop)

Type your content here ...A means to cease an automatic operation at the predesignated normal stoppingposition. Further automatic cycling requires manual re-starting or enabling by the Operator. The cycle stopmanual control shall shall comply with 10.2.1. Cycle stop is a Catagory 2 stop.


Many individuals, especially foreign, consider all stops to be red color device, be it for a motor stop push button or other stop function. Yellow is mentioned in 10.2.2.4 as alternate action, and 10.2.2.5 for abnormal conditions. ANSI B11.1-2009 (and prior) specifies the color yellow for the cycle stop control.




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Committee Statement

Resolution: The substantiation provided does not address the rationale for the change proposed.


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Public Input No. 170-NFPA 79-2016 [ New Section after 9.2.5.3.2 ]

TITLE OF NEW CONTENT "Stop" by De-energization.

Type your content here ... Stop functions shall be initiated by de-energization, not energization of a deviceor as a command to a controller (plc).

Exception: Does not apply to Cycle stop commands.


Lost the requirement for de-energization to cause a "stop" to occur over the past editions. Exception would be for the cycle stop or Top Stop command to cease automatic process operation.




Street Address:

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Committee Statement


Statement: The requirement for de-energization to cause a "stop" to occur was lost over the past editions. AnException was added that would be for the "Cycle Stop" or "Top Stop" command to cease automaticprocess operation without de-energization.

Original language was rewritten for clarity based on editorial comments.


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Public Input No. 138-NFPA 79-2016 [ New Section after 9.2.5.4.1.4 ]


Type your content here ...9.2.5.4.1.5 Wireless devices shall be permitted to be used to initiate emergencystop functions.


Applications are available that include control functions for electric equipment. The standard needs to be clear whether or not these devices are permitted.




Street Address:

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Committee Statement

Resolution: 9.2.7.3.2 provides the necessary requirements for emergency stops used on cableless controlstations. The recommended text for initiating wireless emergency stop does not include requirementsto satisfy the safety of the Emergency stop function.


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Public Input No. 139-NFPA 79-2016 [ New Section after 9.2.5.4.1.4 ]


Type your content here ...9.2.5.4.1.5 Wireless devices shall not be permitted to be used to initiateemergency stop functions.


Applications are available that include control functions for electric equipment. The standard needs to be clear whether or not these devices are permitted.




Street Address:

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Committee Statement

Resolution: 9.2.7.3.2 provides the necessary requirements for emergency stops used on cableless controlstations. The recommended text for initiating wireless emergency stop does not include requirementsto satisfy the safety of the Emergency stop function.


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9.2.7.5 Use of More Than One Operator Control Station.

9.2.7.5.1 Master Operator Control Station

Where a machine has more than one operator control station, measures shall be taken to ensure that onlyone control station shall be enabled at a given time. Indication of which operator control station is in controlof the machine shall be provided at locations where necessary for the safety requirements of the machine.

Exception: A stop command from any one of the control stations shall be effective where necessary forthe safety requirements of the machine.

9.2.7.5.2 Multiple Concurrent Operator Stations

Where a machine has more than one operator two hand control stations being used as a safeguardingdevice, each operator shall have an operator station that requires concurrent operation of the runcontrols.


Allowing the use of multiple operator control stations as required by 29CFR1910.217(c)(3))vii)(a) and ANSI B11.1-2009 8.6.2.1(5).

1910.217(c)(3)(vii)(a)When used in press operations requiring more than one operator, separate two hand controls shall be provided for each operator, and shall be designed to require concurrent application of all operators' controls to activate the slide. The removal of a hand from any control button shall cause the slide to stop.

AMERICAN NATIONAL STANDARD B11.1-20095) If more than one operator is to be safeguarded by the use of two-hand controls, each operator shall have an individual set of operator hand controls.




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Committee Statement

Resolution: Section 9.2.5.2.4 already has the same requirement.


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10.1.6.2 Arrangement of Operator Interface Devices.

All start pushbuttons shall be mounted above or to the left of their associated stop pushbuttons.

Exception No. 1: Start pushbuttons in series, such as operating pushbuttons on punch presses.

Exception No. 2: Wobble-stick or rod-operated emergency stop pushbuttons mounted in the bottom ofpendant stations. Emergency stop devices installed in accordance with 10.7.


Emergency stop devices are uniquely identifiable and have location and mounting requirements already given in 10.7. As emergency stop devices can be associated with more than one start button, the requirement to locate the start buttons relative to an emergency stop device is confusing. The proposed text expands the exception for wobble stick emergency stop devices to include all emergency stop devices.




Street Address:

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Committee Statement


Statement: Emergency stop devices are uniquely identifiable and have location and mounting requirementsalready given in 10.7. As emergency stop devices can be associated with more than one start button,the requirement to locate the start buttons relative to an emergency stop device is confusing.


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TITLE OF NEW CONTENT Control Devices external to the control enclosure

Type your content here ... Control devices external to the control enclosure such as but not limited topushbuttons, indicator lights, pressure switches, electronic measureing device connections (pressuretransducers, position sensors, etc.), solenoids, and limit switches shall be protected from the ingress offoreign debris or liquid, for the operating environment exposure that is expected to be operated in.

Exception: Unless supported by an analysis or other assessment activity, an oiltight, NEMA12, rated device(s) shall be used.


Requirements for enclosures is given, including the degrees of protection, but the control devices are not being addressed. Suggestion is similar to JIC EGP-1-67 requirement at E6.1.4 for the use of oil-tight devices external to the control enclosure.




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Committee Statement

Resolution: This is currently covered adequately in 10.1.3. New content not needed. Additionally, the proposed“exception” appears to mandate the use of only NEMA12 rated devices for everything that doesn’tcome with a supporting analysis/assessment.


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11.2.1.1

All items of control equipment which may require inspection, adjustment, or replacment shall be placed andoriented so that they can be identified without moving them or the wiring. Where practicable, with items thatrequire checking or adjustment for correct operation or that are liable to need replacement, those actionsshall be possible without dismantling other equipment or parts of the machine (except opening doors orremoving covers). Terminals not associated with when the door(s) or cover(s) is opened or removed, theitems can be identified and accessed without moving, removing, or the dismantling of any wiring or otheritems or components of the machine. Terminals for other than control equipment shall also conform tothese requirements. These requirements shall not apply to modules or subassemblies whichare disposable, permanently sealed, and cannot be opened.


Certain Japanese machine makers have begun to "miniaturize" control / power panels, and use modules assembled together as "Control Panels", etc. These "Component" boxes, although presented as being disposable, and not intended to be worked on in the field or on the floor, are super crowded, with components stacked upon other components. If permitted in the field these "boxes" would be a safety hazard and difficult to work on. Permitting these modules or subassemblies etc., ONLY when they are PERMANENTLY sealed and cannot be opened, and therefore TRULY disposable or rebuilt only by the machine maker / supplier - prevents this potential hazard.




Street Address:

City:

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Zip:

Submittal Date: Wed Dec 16 09:04:33 EST 2015

Committee Statement


Statement: An exception has been added to parts of the machine that cannot be serviced. Broke out paragraphwith several requirements into subsections for usability and clarity based on editorial comments


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TITLE OF NEW CONTENT 11.2.1.10

Type your content here ...

Busbars shall be protected from physical damage and be held firmly in place. Spacings between busbarterminals and other bare metal parts shall not be less than specified in Table 430.97(D).


Many control panel builders will shop construct busbar terminations and in multi-phase systems these are typically adjacent to each other. Many times they will disregard the needed separation distance not only between the busbars but also between individual busbars and any grounded surfaces. Additionaly they will overlook the needed separation distances as it is compromised by the fastening hardware or terminal lugs used to secure and terminate conductors to the busbars. NEC Article 430.97 and specifically Table 430.97(D) provides guidance on these needed distances. These separation or clearance requirements can also be found in Article 408.56 and in UL 508A. Provide this new language into NFPA 79 aid in pointing the user to these requirements.





Street Address:

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Committee Statement


Statement: Table 430.97(D) of NFPA 70 provides specific requirements for busbar spacings. These separation orclearance requirements can also be found in Section 409.106 and in UL 508A. Providing this newlanguage into NFPA 79 aids in pointing the user to these requirements.


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11.2.2.1

Machine compartments containing control equipment shall be completely isolated from coolant and oilreservoirs. The compartment Compartments containing equipment that is required to be readily accessiblesuch as branch circuit overcurrent devices shall be readily accessible and completely enclosed.Thecompartment shall not be considered enclosed where it is open to the floor, to the foundation upon whichthe machine rests, or to other compartments of the machine that are not clean and dry.


Machine cabinets and compartments do not always need to be located where they are within easy reach of the floor or a platform. It can be desirable to locate some components that do not need frequent access, maintenance or servicing at higher locations. Not all equipment needs to be readily accessible from the floor. This can also help provide better access and workspace to the industrial machine and other equipment that does need more frequent access.




Street Address:

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Committee Statement


Statement: Machine cabinets and compartments do not always need to be located where they are within easyreach of the floor or a platform. It can be desirable to locate some components that do not needfrequent access, maintenance or servicing at higher locations. Not all equipment needs to be readilyaccessible from the floor. This can also help provide better access and workspace to the industrialmachine and other equipment that does need more frequent access.


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11.4.8

A print pocket sized to accommodate physical electrical diagrams shall or software media shall beattached to the inside or outside of the door of the control enclosure or compartment. When this is notpracticable, it shall be permissible to place a pocket suitable for the environment outside the door of thecontrol enclosure or compartment in a well-identified location. Single-door and multi-door enclosures shallhave at least one print pocket.


As technology progresses many products are not provided with paper schematics or working diagrams. In many cases, CD's are provided and manufactures have envelopes for this purpose and do not have large print pockets. This will allow an option without causing a discrepancy..


Submitter Full Name: Richard Trainor

Organization: TUV SUD America Inc.

Street Address:

City:

State:

Zip:


Committee Statement


Statement: This action takes into account the changing technology being used to provide documentation of theprovided machinery.

Broke out the single paragraph with several requirements into subsections for usability and clarity.


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12.5.2*

Conductors with higher insulation temperatures than specified for the termination(s) shall be permitted to beused for ampacity adjustment, correction, or both, provided the final tabulated ampacity does not exceedthe lowest value of any termination.

Exception: Ampacities of 90°C (194°F) insulated conductors or other special purpose conductors withhigher temperature ratings can be determined in accordance with 310.15 of NFPA 70.


Table values are used to start with the answer resulting from applying factors are not tabular ampacities.




Street Address:

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Committee Statement


Statement: The word tabulated is not the correct term and was removed.


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Type your content here ...12.5.4 NEW Conductors supplying a single motor or multiple motors shall bepermitted to be sized based on 125 percent of the highest rated motor at demand factors based on theloading or application of the motors.


Motors such as servo applications are frequently used at a small portion of their full load rating. If many servo motors are on a machine without this provision the conductors used to supply those motors are or would be sized many times larger than what they need to be.




Street Address:

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Committee Statement


Statement: Motors such as servo applications are frequently used at a small portion of their full load rating. Ifmany servo motors are on a machine without this provision the conductors used to supply thosemotors are or would be sized many times larger than what they need to be.


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12.8.3

Where ampacity derating adjustment is required for more than three current-carrying conductors, thefactor(s) shall be taken from Table 12.5.5(b).


The term adjustment is the appropriate term to refer to a factor based on more than three current carrying conductors.




Street Address:

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Committee Statement


Statement: The term adjustment is the appropriate term to refer to a factor based on more than three currentcarrying conductors.


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12.9.2

Appliance wiring material (AWM) shall be permitted under any of the following conditions:

(1) Where part of an assembly that has been identified for the intended use

(2) Where the AWM has been identified for use with approved equipment and is used in accordance withthe equipment manufacturer’s instructions

(3) Where its construction meets all applicable requirements of Section 12.2 through Section 12.6 withmodifications as follows:

(4) Stranded conductors with wire sizes smaller than those listed in 12.2.2 shall have a minimumof seven strands.

Conductor insulation and cable jacket materials

(a) Cable types not specified in 12.3.1 shall have flame-resistant properties in compliancewith

applicable standards for intended use such as FT2 (horizontal wire) flame test or VW-1 (vertical wire)flame test

(a) the applicable flame test in accordance with ANSI/

UL 1581.

(a) UL 2556. For horizontal applications, the FT2 flame test is applicable. For vertical applications,the FV-1/Vertical Flame test is applicable.

(b) Minimum insulation thicknesses for single-conductor AWM shall be as specified in 12.3.2 .Minimum insulation thickness for conductors that are part of a multiconductor jacketed AWMcable shall be as specified by the AWM style number and by the marked voltage rating of thecable.

(c) AWM shall be marked in accordance with 12.4.1 , 12.4.3 , and 12.4.4 . The legend shallinclude manufacturer’s name or trademark, AWM style number, voltage rating (unless marking isprohibited by 12.4.2 ), wire gauge(s), temperature rating, and flame resistance. Additionalmarkings for properties such as oil, water, UV, and chemical resistance identifiers shall bepermitted where in compliance with applicable standards for intended use. Where markingsalone are insufficient to identify for the intended application, suitable information shall beincluded with the machine technical documentation.


12.3.1 indicates cable types, not insulation and jacket materials. The revision makes this clarification. If the cable types are not provided determining the applicable flame rating is difficult. The minimum flame rating for the types in 12.3.1 is either the Vertical Flame of the FT2 flame, depending on type. Therefore, these tests should be referenced.

UL 1581 is UL’s test reference standard. UL 2556 is the tri-national (US, Canada, Mexico) version of UL 1581. UL 1581 is being revised to move the methods to UL 2556. Rather than referencing one standard which then refers to another standard, having the direct reference is preferred.




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Street Address:

City:

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Committee Statement

Resolution: 12.3.1 addresses both conductors and cables and the AWM standard references the VW-1 flame test.The original text gives examples of acceptable tests rather than making it mandatory.


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TITLE OF NEW CONTENT Conductor terminals identified on assemblies

Type your content here ... Terminals of built-up assemblies and sub-assemblies, being used to connectspecific identified circuit conductors, shall be permanently marked to correspond with the identificationshown on the electrical diagrams. Identification shall not be marked on removable covers or housings.


With custom made, purpose specific, control equipment being used in control systems, terminals being used for interconnection with the remainder of the system need to permanently identified for maintenance and service. Lack of foresight to allow for proper marking has caused some assemblies to have such marking placed on removable covers that are subject to miss placement and loss.




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Committee Statement

Resolution: The intent is covered in section of 13.1.1.6.


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TITLE OF NEW CONTENT Electrical connection to devices and motors.

Type your content here ... Electrical connections to devices, motors and devices with intergral leads (i.e.:solenoids) 4 AWG and smaller, shall be made with ring type pressure connectors. Connectors shall bebolted and taped. Soldered, insulation-piercing, and wire nut connectors shall not be used.


Have found the use of insulation piercing splice connectors (as found at Home Depot) and wire nuts being used on inductive loads (motors) that have resulted in device and motor failures. The motor leads became loose likely due to machine vibration, causing the heating of the conductors to "melt" the wire nuts, then causing line to ground (the motor junction box/motor frame) to occur, and motor winding damage (single phased the polyphase motor).




Street Address:

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Committee Statement

Resolution: Connection requirements are covered in section of 13.1 ( 13.1.1.5, 13.1.1.8, 13.1.2.1) of NFPA 79.Limiting it to ring type pressure connectors is too restrictive.


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13.1.2.4* Cable assemblies with factory-applied connectors and their associated wiring devices shall bepermitted. Such connectors shall not be considered as splices or joints.


Product standards and products are available for wiring system components suitable for industrial machinery including cable assemblies and associated wiring devices such as tees, panel-mounted fittings, field-wired fittings, and so forth. This clause clarifies the permitted use of these devices.



Public Input No. 174-NFPA 79-2016 [New Section after A.13.1.2.1]




Street Address:

City:

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Zip:


Committee Statement


Statement: Product standards and products are available for wiring system components suitable for industrialmachinery including cable assemblies and associated wiring devices such as tees, panel-mountedfittings, field-wired fittings, and so forth. Annex material will be submitted.

The new annex note provides a reference to two standards that address the cable assemblies andassociated wiring devices that 13.1.2.4 describes.


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13.1.6.1*

Exposed cables installed along the structure of the equipment or system or in the chases of the machineryshall be permitted. Exposed cables shall be installed to closely follow the surface and structural members ofthe machinery.


This change is meant to correct an editing oversight. Remove asterisk. The asterisk was not moved during the 2012 Edition cycle when 13.1.6.1 was renumbered to 13.1.7.1. This change is associated with proposed changes to 13.1.7.1 and A.13.1.6.1.







Street Address:

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Committee Statement


Statement: This FR is correcting an error in the last edition of the standard by removing an asterisk and adding itto 13.1.7.1.


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13.1.7.1 *

Manufactured assemblies with factory-applied molded connectors applied to cord shall be permitted.


This change is meant to correct an editing oversight. Add asterisk to 13.1.7.1. The asterisk was not moved during the 2012 Edition cycle when 13.1.6.1 was renumbered to 13.1.7.1. This change is associated with proposed changes to 13.1.6.1 and A.13.1.6.1.








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Committee Statement




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TITLE OF NEW CONTENT Conductor Identification

Type your content here ...13.2.1.1.X Each conductor shall have the same identification at all terminals andtie points.


To avoid confusion by the use of sequential conductor numbering that causes a number change at a terminal or tie point. Non-industrial machine conductor numbering systems as found in "construction equipment."




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Committee Statement

Resolution: This proposed text is not necessary it is essential that the all conductor identification correspond withthe technical documentation. This requirement is covered in 13.2.2.1.


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13.2.1.1

Conductors shall be identified at each termination by number, letter, color (either solid or with one or morestripes), or a combination thereof and shall correspond with the technical documentation as defined inChapter 17. Internal wiring on individual devices purchased completely wired shall not require additionalidentification.


A green/yel conductor of a multiconductor cable was used as an ungrounded conductor but having the same identification number. Wire color use as identification (color green) in conflict with prohibition contained in 13.2.2.1. Conflict between sections caused confusion in appropriate conductor use by a foreign equipment supplier.




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Committee Statement

Resolution: Combinations of conductor identification are frequently used.


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13.2.2.1*

The color GREEN with or without one or more YELLOW stripes shall be used to identify the equipmentgrounding conductor where insulated or covered. This color identification shall be strictly reserved for theequipment grounding conductor.

Exception No. 1: In multiconductor cable-connected assemblies where equipment grounding is notrequired, the solid color GREEN shall be permitted for other than equipment grounding.ExceptionNo. 2: It shall be permitted to use conductors of other colors, provided the insulation or cover isappropriately identified at all points of access.

Exception No. 3: For grounded control circuits, use of a GREEN insulated conductor with or without oneor more YELLOW stripes or a bare conductor from the transformer terminal to a grounding terminal on thecontrol panel shall be permitted.


Multiconductor cable (4 cond, red, white, black, green/yel) used to connect devices. Green/yel conductor had same identification sleeve of an ungrounded conductor. Maintenance service took disconnected cable conductor green/yel to ground, causing short circuit. Shock/fire hazard. Additional suggestion will be in conductor identification (13.2.1.1) removing "or a combination thereof."




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Committee Statement


Statement: Exception No. 1 was removed and Exceptions No. 2 and 3 were renumbered. Green is generallyreserved for equipment grounding conductors and Exception No. 1 was too broad. The remainingexception provides the necessary flexibility from the main requirement.

This ensures that the equipment grounding conductor if striped is predominantly green.


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13.2.2.1*

The color GREEN with or without one or more YELLOW stripes shall be used to identify the equipmentgrounding conductor where insulated or covered. This color identification shall be strictly reserved for theequipment grounding conductor.

Exception No. 1: In multiconductor cable-connected assemblies where equipment grounding is notrequired, the solid color GREEN shall be permitted for other than equipment grounding.

Exception No. 2: It shall be permitted to use conductors of other colors, provided the insulation or cover isappropriately identified at all points of access.

Exception No. 3: For grounded control circuits, use of a GREEN insulated conductor with or without oneor more YELLOW stripes or a bare conductor from the transformer terminal to a grounding terminal on thecontrol panel shall be permitted. Transformer mounting hardware shall not be used for this purpose.


Grounding connection would be dependent upon mounting hardware.




Street Address:

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Committee Statement

Resolution: The intent is covered in 8.1.3 Mounting hardware shall not be used for terminating conductors usedfor grounding and bonding.


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13.2.2.1 *

The color GREEN with or without one or more YELLOW stripes shall be used to identify the equipmentgrounding conductor where insulated or covered. This color identification shall be strictly reserved for theequipment grounding conductor. Green must be the majority color when used in combination with one ormore yellow stripes.

Exception No. 1: In multiconductor cable-connected assemblies where equipment grounding is notrequired, the solid color GREEN shall be permitted for other than equipment grounding.

Exception No. 2: It shall be permitted to use conductors of other colors, provided the insulation or cover isappropriately identified at all points of access.

Exception No. 3: For grounded control circuits, use of a GREEN insulated conductor with or without oneor more YELLOW stripes or a bare conductor from the transformer terminal to a grounding terminal on thecontrol panel shall be permitted.


Conductors meeting the international standard for green and yellow combinations may have more yellow than green. Confusion exist by both the user, maintenance personnel and inspectors if this yellow conductor with one or more green stripes has some other purpose. Adding a requirement as to the requirement majority color (green) will address this problem.





Street Address:

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Committee Statement


Statement: Exception No. 1 was removed and Exceptions No. 2 and 3 were renumbered. Green is generallyreserved for equipment grounding conductors and Exception No. 1 was too broad. The remainingexception provides the necessary flexibility from the main requirement.

This ensures that the equipment grounding conductor if striped is predominantly green.


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13.2.3.2

The use of other colors for the following applications shall be as follows:

(1) WHITE with BLUE stripe for grounded (current-carrying) dc circuit conductor

(2) WHITE with ORANGE stripe for grounded (current-carrying) ac circuit conductor, which remainsenergized when the main supply circuit disconnecting means is in the off position

(3) WHITE with ORANGE & BLUE stripe for grounded (current carrying) dc circuit conductor, whichremains energized when the main supply circuit disconnecting means is in the off position

(4) Whichever color stripe is selected, that color stripe shall be consistent with the ungrounded conductorof the excepted circuit described in 5.3.5.

Exception No. 1: Multiconductor cables shall be permitted to be permanently reidentified at the time ofinstallation.

Exception No. 2: Where the identification of machine power and control wiring is such that compliancewith the mandatory color codes is too restrictive for specific applications, it shall be permitted to useadditional identification at selected locations as an alternative. This means of identification shall bepermitted to be by separate color coding, marking tape, tagging, or other approved means and shall bepermanently posted on the inside of the main electrical control panel enclosure in a visible location.


Easily identify voltages that remain on. This coincides with my public input no. 61 NFPA 79-2015. Items 2 & 3 of this section could easily be their own section for grounded conductors that remain on or combined with section 13.2.4.1





Submitter Full Name: Jim Smith

Organization: Tool North Inc

Street Address:

City:

State:

Zip:

Submittal Date: Mon Nov 16 14:25:16 EST 2015

Committee Statement

Resolution: There are additional methods that can be used to differentiate between AC and DC conductors thatremain energized after disconnect.


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13.2.4.1 *

The color ORANGE shall be used to identify ungrounded conductors that Where conductors remainenergized when the main supply circuit disconnecting means is in the off position. This color identificationshall be , the following color codes shall be used:

(1) Black w/Orange stripe for ungrounded AC power conductors

(2) Orange or Red w/Orange stripe for ungrounded AC control conductors

(3) Blue w/Orange stripe for DC control conductors

These color identifications shall be strictly reserved for this application only.

Exception No. 1: Internal wiring on individual devices purchased completely wired

Exception No. 2: Where the insulation used is not available in the colors required (e.g., high temperatureinsulation, chemically resistant insulation)


To follow the wiring codes of 13.2.4.3, it makes sense to follow suite with an orange designator so voltages are more easily recognized based on color that are energized while the main disconnect is off. I am seeing more and more DC requirements with respect to machine lighting and this makes it easier to identify if I am dealing with an AC circuit or a DC circuit, before I even look at the prints.





Submitter Full Name: Jim Smith

Organization: Tool North Inc

Street Address:

City:

State:

Zip:

Submittal Date: Mon Nov 16 13:39:22 EST 2015

Committee Statement

Resolution: There are additional methods that can be used to differentiate between AC and DC conductors thatremain energized after disconnect.


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13.2.4.2

Where color is used for identification, the color shall be used throughout the length of the conductor eitherby the color of the insulation or by color markers.

Exception 1 : Multiconductor cables shall be permitted to be permanently reidentified at the time ofinstallation. Re-identification shall be by a suitable colored material (i.e.: colored electrical tape or coloredconductor identification sleeve) that completely encircles the conductor at all terminal locations.

Exception 2: Other conductors (except for green, green/yel, or bare) larger than 12 awg. shall be allowedto change the insuation color as above.


Exception 1. We give no guidance on how to perform color re-identification of multi-conductor cable conductors.Exception 2. Gives guidance on how to color identify 10 awg. conductors and larger to be identified to voltage potential as described in 13.2.4.3. Visual shock hazard awareness.




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Committee Statement

Resolution: The recommended text was unclear and may create a conflict within rules in NFPA 70 regardingconductor identification.


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13.3.1*

Nonmetallic ducts wiring chanels shall be permitted only when they are made with a flame-retardantinsulating material.


Duct is an IEC term and is included in Annex J3. Duct is also commonly used to refer to non-electric products such as air duct. It should not be used to describe an electric product in NFPA 79. The term "wiring channel" is presently used in 11.2.1.5.4 and 12.5.5 and is a better term.




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Committee Statement


Statement: Duct was replaced with wiring channels for correlation within the standard. It should not be used todescribe an electric product in NFPA 79. The term "wiring channel" is presently used in 11.2.1.5.4 and12.5.5 and is a better term.


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13.3.4

Conductors inside enclosures shall be supported where necessary to keep them in place. Conductors thatdo are not run in ducts wiring channels shall be supported.






Street Address:

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Committee Statement


Statement: Duct was replaced in the standard with wiring channels for correlation. The term "wiring channel" ispresently used in 11.2.1.5.4 and 12.5.5 and is a better term.


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The means of introduction of cables or ducts cords with their individual glands, bushings, and so forth intoan enclosure shall ensure that the degree of protection is not reduced.


Duct is an IEC term and is included in Annex J3. Duct is also commonly used to refer to non-electric products such as air duct. It should not be used to describe an electric product in NFPA 79. The term "wiring channel" is presently used in 11.2.1.5.4 and 12.5.5 and is a better term. Cords was added as they can be used in some situations.




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Committee Statement


Statement: The term "duct" has been replaced with wireways which is the applicable term outside of theenclosure. "Cords" was added as an additional means of entry. "Introduction" was changed to entryand "of the enclosure" was added for clarity.


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13.5.6 Wireways (Cable Trunking Systems) .

13.5.6.1

Wireways (cable trunking systems) external to enclosures shall be rigidly supported and clear of all movingor contaminating portions of the machine.

13.5.6.2

Covers shall be shaped to overlap the sides; gaskets shall be permitted. Covers shall be attached towireways by hinges or chains and held closed by means of captive screws or other suitable fasteners. Onhorizontal wireway, the cover shall not be on the bottom. Hinged covers shall be capable of opening at least90 degrees.

13.5.6.3

Where the wireway is furnished in sections, the joints between sections shall fit tightly, but shall not berequired to be gasketed.

13.5.6.4

The only openings permitted shall be those required for wiring or for drainage.

13.5.6.5

Wireways shall not have opened but unused knockouts.

13.5.6.6

Metal thickness and construction of wireways shall comply with ANSI/UL 870.


This is an IEC term and should have been deleted in the 2015 edition.




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Committee Statement


Statement: "Cable trunking systems" is an IEC term and should have been deleted in the 2015 edition. Wirewaysis the correct term for use in NFPA 79. "trunking systems" is further explained in Annex J.


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15.1.1 Receptacles for Accessory Equipment.

Where the machine or its associated equipment is provided with receptacle outlets to be used for accessoryequipment (e.g., handheld power tools, test equipment), the following conditions shall apply:

(1) Receptacles mounted external to externally or internally to the enclosure shall be ground-fault circuit-interrupter (GFCI)–protected.

(2) Receptacles shall be supplied from a grounded 120 volt ac source.

(3) Receptacles shall be of the parallel blade grounding type, 125-volt, single-phase, 15- or 20-ampereconfiguration and listed for the applied voltage.

(4) Receptacles with their associated attachment plugs (plug/sockets) shall be in accordance with13.4.5.3.

(5) The continuity of the equipment grounding circuit to the receptacle outlet shall be verified bySection 18.2.

Exception: Verification is not required for PELV circuits in accordance with Section 18.2.

(6) All ungrounded (unearthed) conductors connected to the receptacle outlet shall be protected againstovercurrent in accordance with the provisions of 7.2.5, and these circuits shall not be connected toother machine circuits.

(7) Where the power supply to the receptacle outlet is not disconnected by the supply disconnectingdevice for the machine or section of the machine, the safety sign requirements of 5.3.5.4 shall apply.

(8) Receptacles shall be suitable for the environment. Receptacles mounted external to the enclosureand subject to dirt, dust, oil, or other contaminants shall be provided with a means to cover thereceptacle when the plug is removed.



79_PC_21-_HELD.pdf PC 21 held



Submitter's Substantiation: Since some products have internally mounted receptacles that are not intended for maintenance, this closes the loop to ensure ground-fault protection.



Organization: NFPA

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Committee Statement


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Where the machine or its associated equipment is provided with receptacle outlets to be used for accessory equipment (e.g., handheld power tools, testequipment), the following conditions shall apply:

(1) Receptacles mounted external to externally or internally to the enclosure shall be ground-fault circuit-interrupter (GFCI)–protected.


(3) Receptacles shall be of the parallel blade grounding type, 125-volt, single-phase, 15- or 20-ampere configuration and listed for the applied voltage.

(4) Receptacles with their associated attachment plugs (plug/sockets) shall be in accordance with 13.4.5.3.

(5) The continuity of the equipment grounding circuit to the receptacle outlet shall be verified by Section 18.2.

Exception : Verification is not required for PELV circuits in accordance with Section 18.2.

(6) All ungrounded (unearthed) conductors connected to the receptacle outlet shall be protected against overcurrent in accordance with the provisions of7.2.5, and these circuits shall not be connected to other machine circuits.

(7) Where the power supply to the receptacle outlet is not disconnected by the supply disconnecting device for the machine or section of the machine,the safety sign requirements of 5.3.5.4 shall apply.

(8) Receptacles shall be suitable for the environment. Receptacles mounted external to the enclosure and subject to dirt, dust, oil, or other contaminantsshall be provided with a means to cover the receptacle when the plug is removed.


since some products have intenrally mounted receptacles that are not intended for maintanance, this closes the loop to ensure ground-fault protection.


Submitter Full Name:RICHARD TRAINOR

Organization: TUV SUD AMERICA

Street Address:

City:

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Zip:

Submittal Date: Fri Apr 26 15:50:25 EDT 2013

Committee Statement

Committee Action: Rejected but held

Resolution: This is new material that has not had public review.


I, RICHARD TRAINOR, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Comment (including both the Proposed



assignment.

By checking this box I aff irm that I am RICHARD TRAINOR, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and


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Statement: The revision will require ground fault circuit interrupter on internal receptacles and increase safety.


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Where the machine or its associated equipment is provided with receptacle outlets to be used foraccessory equipment (e.g., handheld power tools, test equipment), the following conditions shall apply:

(1) Receptacles mounted external to the enclosure shall be ground-fault circuit-interrupter (GFCI)–protected.


(3) Receptacles shall be of the parallel blade grounding type, 125-volt, single-phase, 15- or 20-ampereconfiguration and listed for the applied voltage.

(4) Receptacles with their associated attachment plugs (plug/sockets) shall be in accordance with13.4.5.3 .

(5) The continuity of the equipment grounding circuit to the receptacle outlet shall be verified bySection 18.2 .

Exception: Verification is not required for PELV circuits in accordance with Section 18.2 .

(6) All ungrounded (unearthed) conductors connected to the receptacle outlet shall be protected againstovercurrent in accordance with the provisions of 7.2.5 , and these circuits shall not be connected toother machine circuits.

(7) Where the power supply to the receptacle outlet is not disconnected by the supply disconnectingdevice for the machine or section of the machine, the safety sign requirements of 5.3.5.4 shallapply.

(8) Receptacles shall be suitable for the environment. Receptacles mounted external to the enclosureand subject to dirt, dust, oil, or other contaminants shall be provided with a means to cover thereceptacle when the plug is removed.

Exception: Dedicated receptacles for use in critical systems which are required continuously for the properfunction of the machine, shall not require ground-fault circuit-interrupter (GFCI)–protection. Suchdedicated receptacles shall be marked to indicate it is a critical system receptacle and not for general use.


Critical systems, in the event of power loss would lead to a hazardous condition, shall be allowed the exception to the GFCI requirement.




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Submittal Date: Thu Dec 24 09:27:06 EST 2015

Committee Statement

Resolution: The recommendation was unclear and there is no definition of critical systems provided.


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TITLE OF NEW CONTENT Machine mounted lighting

Type your content here ...Machine mounted lighting that is part of an industrial machine, either internal(within the point of operation area) or external (near the point of operation providing illumination of the area)shall have ground-fault circuit interrupter (GFCI) protection for personnel.


GFCI protection is specified receptacles mounted and used on the machine tool, but the lighting fixtures can expose the personnel to the same shock hazard during maintenance or failed operation (breakage of cover or lenses). Many machine use water based coolants or cutting solutions that accumulate on the machine tool surfaces, and area surrounding. Not much different than a dwelling unit "basement" or "garage." (NFPA70-2014 210.8(A).




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Committee Statement

Resolution: The submission did not present adequate substantiation that all lighting requires GFCI protection.


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16.2.1*

Enclosures that do not clearly show that they contain electrical devices shall be marked with a safety signin accordance with ANSI Z535 series, which deals with product safety signs.



NFPA_79_proposal_egloff_2015.docx

proposed change. I have some pictures of machines we have with more ANSI stickers than a nascar car - information overload. I did not include them, but can bring examples to the meeting. I have also had experience with the use of non-standard stickers, which are confusing. The use of stickers to alert users of hazards should extend beyond just electrical hazards and include other hazards of the equipment. But too many stickers will be ignored by a user. The committee may want to suggest a limit, but I suggest adding this as guidance to the asterix'd comments in the appendix.


Machines and equipment have other hazards than electrical. Signs alerting users to hazards other than electrical should be stated in the standard. The number of signs should not be "excessive" or users will suffer "information overload" and tend to ignore all of the signs. I don't think that anyone has established a limit as to how many signs constitute information overload so I propose having this in explanatory appendix material. Also, ANSI format should be used for all signs. I have had to deal with "non-standard signs." They are as deciding to use a round blue traffic stop sign instead of the expected 8-sided red one. The current language mentions only signs regarding electrical hazards within the machine.


Submitter Full Name: MATT EGLOFF

Organization: MONTANA TECH UNIVERSITY OF MO

Affilliation: None

Street Address:

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Submittal Date: Wed Nov 18 14:36:44 EST 2015

Committee Statement

Resolution: The recommendation was overly broad.The submitter did not define limits (quantity and subject)allowed.


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16.2.1* Enclosures that do not clearly show that they contain electrical devices shall be marked with a safety sign in accordance with ANSI Z535 series, which deals with product safety signs. Modified:

Enclosures that do not clearly show that they contain electrical devices shall be marked with a safety sign. Machines shall be marked with safety signs indicating hazards. Safety signs shall comply with ANSI Z535 series, which deals with product safety signs. Explanatory add* Excessive use of safety signs shall be avoided as this detracts from alerting users to dangers by presenting too much information.

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16.4.2

The full-load current shown on the nameplate shall not be less than the full-load currents for all motors andother equipment that can be in operation at the same time under normal conditions of use. Where unusualloads or duty cycles require oversized conductors, the required capacity shall be included in the full-loadcurrent specified on the nameplate. The full-load current rating shall not be grater than 125% of themeasure input current.


Some products are sold in different configurations which result in different input current values, or input current is determined based on adding the rated currents of components in the product. When measuring a products overall input current I have found that products operate much less than their ratings. This requires end users to increase or add to their installation (receptacles, wiring, overcurrent protection, etc.) unnecessarily and can result in overcurrent protection that may never open under a fault condition.


Submitter Full Name: Richard Trainor

Organization: TUV SUD America Inc.

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Committee Statement

Resolution: The added requirement will lead to the necessity to input test all machines. This will not be possiblewith all machines until installation is complete.


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17.2 Information to Be Provided.

The following information shall be provided with the electrical equipment:

(1) Clear, comprehensive description of the equipment, installation and mounting, and the connection tothe electrical supply(ies)

(2) Electrical supply circuit(s) requirements

(3) Overview (block) diagram(s) where appropriate

(4) Schematic diagram(s)

(5) Information (where appropriate) on the following:

(6) Programming

(7) Sequence of operation(s)

(8) Frequency of inspection

(9) Frequency and method of functional testing

(10) Adjustment, maintenance, and repair

(11) Interconnection diagram

(12) Panel layouts

(13) Instruction and service manuals

(14) Physical environment (e.g., lighting, vibration, noise levels, atmospheric contaminants)

(15) A description (including interconnection diagrams) of the safeguards, interacting functions, andinterlocking of guards with potentially hazardous motions

(16) A description of the safeguarding means and methods provided where the primary safeguards areoverridden (e.g., manual programming, program verification)

(17) Information for safety lockout procedure

(18) Explanation of unique terms

(19) Parts list and recommended spare parts list

(20) Maintenance instructions and adjustment procedures

(21) Reference information (where appropriate) on the following:

(22) Lubrication diagram

(23) Pneumatic diagram

(24) Hydraulic diagram

(25) Miscellaneous system diagrams (e.g., coolant, refrigerant)

Change (8) Information necessary to establish an Electrically Safe Work Condition.


The term "Safety Lockout" implies that there are differing "flavors" of Lockout? A "Safety" lockout vs just Lockout / tagout? Also, Lockout is not defined. NFPA 70E defines "Electrically Safe Work Condition" which is also concise and inclusive .


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Street Address:

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Committee Statement


Statement: Parenthesis 8 has been revised to provide clarity as the term "control of hazardous energies" betterreflects the information necessary to accomplish this requirement.


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17.7.1 *

Diagrams, including machine schematics, of the electrical system shall be provided and shall show theelectrical circuits on the machine and its associated electrical equipment. Electrical symbols shall be inaccordance with IEEE 315/315A where included therein, or in accordance with other symbol standards asagreed upon by the supplier and customer . Any electrical symbols not included in IEEE 315/315A shall beseparately shown and described on the diagrams. The symbols and identification of components anddevices shall be consistent throughout all documents and on the machine.

Exception: Wiring schematics shall not be required for commercially available or field replaceablecomponents.


There are many existing installations and engineered designs which include symbols that are not per IEEE315. Customers and suppliers alike for many years have used other symbologies, such as JIC125.Requiring solely the IEEE315 symbol libraries would introduce symbols and diagrams unfamiliar to many customers and manufacturers.


Submitter Full Name: William Brungs

Organization: Intelligrated Systems

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Committee Statement

Resolution: The addition of the information recommended by the submitter does not enhance application orusability of NFPA 79. Additional revisions to 17.7.1 or adding a line item to annex B may address theintent of the public input.


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18.1 * General.

The verification of the continuity of the equipment grounding circuit shall be conducted and documentedwhen the requirements of chapter 8 are not strictly satisfied . When the electrical equipment is modified,the requirements in Section 18.7 shall apply. Applicable tests shall be performed where deemednecessary in accordance with the references in the following list:

(1) Verification that the electrical equipment is in compliance with the technical documentation (seeChapter 17 )

(2) Insulation resistance test (see Section 18.3 )

(3) Voltage test (see Section 18.4 )

(4) Protection against residual voltages test (see Section 18.5 )

(5) Functional test (see Section 18.6 )


The ground continuity test should only be a requirement based on need and/or the design practice. NFPA 70 and 79 detail design practice which will result in the correct performance. When the standards are not followed strictly, the equipment grounding circuit performance must be verified by testing.




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Submittal Date: Sun Dec 27 20:48:44 EST 2015

Committee Statement

Resolution: The requirements of Chapter 8 are design requirements, not a substitute for test requirements. Notcomplying with CH. 8 should not be the only reason for implementing the requirement in 18.1asrecommended in the PI . The phrase "where practicable" for "where deemed necessary" or revisionsto 18.2 may accomplish the intent of this Public Input.


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Public Input No. 105-NFPA 79-2016 [ New Section after A.3.3.8 ]

A.3.xx Basic protection

Previously referred to as "protection against direct contact"


Annex note to clarify change to terminology







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Committee Statement


Statement: The committee accepts the new definition of “basic protection” but adds the term “protection fromdirect contact” in parenthesis for historical reference for one revision cycle for a better understandingof the terms. The committee also accepts the new annex note.


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Public Input No. 133-NFPA 79-2016 [ Section No. A.3.3.14 ]

A.3.3.14 Cableless Wireless Operator Control Station.

These stations are not physically connected to the machine by either communications or power conductors.While all cableless devices utilize wireless technology, not all wireless devices are cableless. Examples ofcableless wireless devices include cableless wireless hand held devices wireless teach pendants,cableless wireless crane pendants, and cableless wireless jog pendants.


Wireless is a more commonly used term. Commercially available products described this way are used for industrial machinery control and status indication. The standard should be consistent with the products used. Stating that "not all wireless devices are cableless" dos not clearly explain the concept and adds confusion.




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Committee Statement

Resolution: This proposal doesn't provide sufficient substantiation to change the language.


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A3.3.40 Exposed

Components which are designed to prevent unintentional contact with live circuits, also known asfinger-safe, qualify as proper guarding to exposed live parts.


The term finger safe is often specified in machine electrical requirements. Component manufacturers list products as finger safe, but there is no direct correlation to exposed or guarding of exposed circuits.




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Committee Statement

Resolution: The style manual does not permit mandatory text "qualify" within annex material.


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A.3.yy Fault protection

previously referred to as "protection against indirect contact"


Annex note to clarify change to new terminology.







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Committee Statement


Statement: The committee accepts the new definition of the term “fault protection” but adds the term “protectionfrom indirect contact” for historical reference for one revision cycle for a better understanding of theterms. The committee also accepts the new annex note.


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A.3.3.53 Industrial Control Panel

Control stations or pendants which contain only operator interface devices (pushbuttons, selector switches,or similar input means) are not considered an industrial control panel.


This clarifies that a control station (operator interface functionality of control circuit) is not an industrial control panel when it only consists of control circuit interface operators. There is ambiguity as to whether all control stations are a control panels.




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Committee Statement

Resolution: The proposed informative text is in conflict with the normative text and is mandatory language whichis not permitted in the Annex.


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A.3.3.67 Obstacle

Commonly referred to as electrically palm safe.


By establishing that an obstacle is palm safe, the degree of protection from live parts is more easily understood.




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Committee Statement

Resolution: The proposed change conflicts with 3.3.2 in the way "obstacle" is used in that defined term.


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A.4.8 Available Fault Current

It is the responsibility of the user to ensure this requirement is satisfied.


Clarification of the responsible party (owner of building service connection) will eliminate the confusion which often occurs. Users assume the machine manufacturer must supply a short circuit rated machine which is appropriate for their service. This information is commonly unknown to the machine manufacturer. The user is required to determine this data. Therefore, the responsibility should rest on the user to ensure the requirement is met.




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Committee Statement

Resolution: Mandatory language and assignment of responsibility is not permitted in the annex. The proposedtext may be more appropriate as normative text.


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Public Input No. 184-NFPA 79-2016 [ Section No. A.6.2 ]

A.6.2 .1

Outside the USA the voltage is limited to 30 volts rms ac or 60 volts dc ripple-free.


PI162 Moved voltage reference to 6.2.1.







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Committee Statement







Annex




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Public Input No. 96-NFPA 79-2015 [ Section No. A.6.2 ]

A.6.2

In order to satisfy the requirements of section 6.2, the requirements detailed in section 6.2.1 or 6.2.2 shallbe met. Outside the USA the voltage is limited to 30 volts rms ac or 60 volts dc ripple-free.


By adopting the proposed text, the ambiguity of whether all requirements must be met, in this section, will be eliminated.




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Committee Statement

Resolution: The proposed text is mandatory and not permitted in Annex material.


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Public Input No. 185-NFPA 79-2016 [ Section No. A.6.2.4.1 ]

A.6.2. 4 3 .1 .1

See NFPA 70E, for additional information on work practices.


PI162 moved referenced section.







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Committee Statement







Annex




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A.6.3.1 .1

Ripple-free is conventionally defined for a sinusoidal ripple voltage as a ripple content of not more than10 percent rms. For additional information on isolating transformers, refer to IEC 60742 and IEC 61558-1.In addition, the following measures need to be considered:

(1) The type of supply and grounding system

(2) The impedance values of the different elements of the equipment grounding system

(3) The characteristics of the protective devices used to detect insulation failure


PI162 moved reference section







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Committee Statement








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Annex





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Public Input No. 174-NFPA 79-2016 [ New Section after A.13.1.2.1 ]

A.13.1.2.4 For example, see UL Subject 2237 and UL 2238.


This annex note provides a reference to two standards that address the cable assemblies and associated wiring devices that the proposed 13.1.2.4 describes.



Public Input No. 172-NFPA 79-2016 [New Section after 13.1.2.3]




Street Address:

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Committee Statement


Statement: Product standards and products are available for wiring system components suitable for industrialmachinery including cable assemblies and associated wiring devices such as tees, panel-mountedfittings, field-wired fittings, and so forth. Annex material will be submitted.

The new annex note provides a reference to two standards that address the cable assemblies andassociated wiring devices that 13.1.2.4 describes.


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A.13.1.6 7 .1

For additional information on flexible cords, refer to ANSI/UL 62.


This change is meant to correct an editing oversight. Change "6" to "7". The note was not renumbered during the 2012 Edition cycle when 13.1.6.1 was renumbered to 13.1.7.1. This change is associated with proposed changes to 13.1.6.1 and 13.1.7.1.







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Committee Statement




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Public Input No. 151-NFPA 79-2016 [ Section No. B.1 ]

B.1

DELETE "duct" in item 25.

It is recommended that the information in Figure B.1 be provided by the intended user of the equipment. Itfacilitates an agreement between the user and supplier on basic conditions and additional userrequirements to ensure proper design, application, and utilization of the electrical equipment of the machine(see Section 4.1).

Figure B.1 Inquiry Form for the Electrical Equipment of Machines.


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Street Address:

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Committee Statement


Statement: Replace the term "DUCT" with "wireways" in item 25 to be consistent within the standard. The term"duct" has been replaced with wireways which is the applicable term outside of the enclosure.


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Public Input No. 152-NFPA 79-2016 [ Section No. D.1 ]


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D.1

DELETE "duct" in FIGURE D.1(h)


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Figure D.1(a) through Figure D.1(v) are not intended to be (design) guidelines. They are included only toillustrate documentation methods.

Figure D.1(a) Cover Sheet and Sheet Index.

Figure D.1(b) System Layout and Installation Diagram.

Figure D.1(c) Block (System) Diagram.

Figure D.1(d) Interconnection Diagram.

Figure D.1(e) Elementary Schematic.


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Figure D.1(f) PLC Input Diagram.


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Figure D.1(g) PLC Output Diagram.


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Figure D.1(h) Sample Enclosure Layout — Interior.

Figure D.1(i) Sample Enclosure Layout — Exterior.


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Figure D.1(j) Sequence of Operations — Graphical.

Figure D.1(k) Sequence of Operations — Descriptive Graphical.

Figure D.1(l) Sample Servo Diagram.


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Figure D.1(m) Sample PLC Network — Station Layout.


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Figure D.1(n) Sample Operator Station.


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Figure D.1(o) Sample Parts List.

Figure D.1(p) ISO (A2) Drawing Standard Framework.


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Figure D.1(q) Selections from ANSI Y32.2/IEEE 315/315A Symbol Table.






Street Address:

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Zip:


Committee Statement


Statement: Replace the term "wire DUCT" with "wiring channel" in all locations in FIGURE D.1(h) to be consistentwithin the standard.


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Public Input No. 87-NFPA 79-2015 [ New Section after J.1 ]

J.4 Terms and Definitions Used in CEMA 110

Control Architecture,Centralized . A control logic architecture in which all logic solving,sensory input collection, and actuator control is executed by a single controller and control panel. An example would be a PLC control cabinet that contains a processor to solve logic, input modulesfor all sensors signals, and output modules for all actuator control signals. The input and outputsignals are wired from the field device to the PLC control cabinet

Control Architecture, Distributed. A control logic architecture in which all logic, sensoryinput, and actuator control is solved, collected and executed by a more than one controller. Anexample would be microcontrollers located on every conveyor motor and contain a processor tosolve logic, input modules for all sensors signals, and output modules for all actuator controlsignals. The input and output signals are wired from the field device to the microcontroller. Eachmicrocontroller would solve logic and command actuators that are specific to the function of theconveyor. The coordination of all the motors (macro-commands) would be completed with intra-microcontroller communication and microcontroller communication with the machine supervisorcontrol system.

Device wiring architecture, Discrete. A power and control system distribution systemarchitecture in which all sensor and actuator signals are collected and delivered by directly wiringto/from the device and the controller. An example is a binary sensor signal that uses one wire tocommunicate an on or off state, based on the absence or presence of voltage with respect to avoltage reference that is common to the sensor and controller.

Device wiring architecture, Distributed. A power and control system distributionarchitecture in which all sensor and actuator signals are collected and delivered by networkinterface modules which interpret the sensor signals and convert them into a message to betransmitted to the controller over a communication network. Complementary, the PLC sends amessage to actuator network interface which converts the message to an output command for theactuator. An example is a sensor wire connected to a remote input module. The remote inputmodule and controller are connected to an Ethernet network and can exchange data at a ratesufficient to properly control the machine.

Power Distribution Architecture, Dedictated . A power and control system distributionsystem architecture in which each nominal voltage supply is distributed using a dedicated pathand no overlap of function or supply function is allowed. An example would be a 480VAC supply tomotors is carried on wires or buss bars, supply to 24VDC devices is carried on wires or buss bars,and communication networks are carried on dedicated cables.

Power Distribution Architecture, Multifunction . Voltage supplies share common pathwaysand overlap in function for power and communication distribution. Examples include power overEthernet (DC supply carried on Ethernet cable) or Ethernet over power (Ethernet communicationscarried on high power conductors).


By adding a section with terms and definitions from CEMA 110, users from this industry will have harmonization.

Independent of the CEMA harmonization, by adding a definition of the proposed, a reference for documentation clarification will be established. This will lead to future improvements and technology in documentation that is not possible without establishing a standard definition.





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Affilliation: CEMA

Street Address:

City:

State:

Zip:


Committee Statement


Statement: Subtitles were capitalized for consistency. By adding a section with terms and definitions from CEMA110, users from this industry will have harmonization.

Independent of the CEMA harmonization, by adding a definition of the proposed, a reference fordocumentation clarification will be established. This will lead to future improvement and technology indocumentation that is not possible without establishing a standard definition.


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Public Input No. 2-NFPA 79-2015 [ Chapter K ]

Annex K Informational References

K.1 Referenced Publications.

The documents or portions thereof listed in this annex are referenced within the informational sections ofthis standard and are not part of the requirements of this document unless also listed in Chapter 2 for otherreasons.

K.1.1 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 70 ®, National Electrical Code ®, 2014 edition.

NFPA 70E ®, Standard for Electrical Safety in the Workplace ®, 2015 edition.

NFPA 77, Recommended Practice on Static Electricity, 2014 edition.

K.1.2 Other Publications.

K.1.2.1 ANSI Publications.

American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY 10036.

ANSI B11.0, Safety of Machinery - General Requirements and Risk Assessment, 2010.

ANSI B11-TR4, Selection of Programmable Electronic Systems (PES/PLC) for Machine Tools, 2004.

ANSI B11-TR6, Safety Control Systems for Machine Tools, 2010.

ANSI Z535.4, Product Safety Signs and Labels, 2007 2011 .

K.1.2.2 EN Publications.

European Committee for Electrotechnical Standardization (CENELEC), 35, Rue de Stassartstraat, B-1050, CEN - ELEC Management Centre , Avenue Marnix 17, B- 1000 Brussels, Belgium. CENELEC OnlineInfo Service: [email protected]

BS EN 60204-1, Safety of machinery — Electrical equipment of machines — Part 1: Generalrequirements, 2006 + A1 2009 , Corrigendum, 2010 .

BS EN 61010-1, Safety requirements for electrical equipment for measurement, control, and laboratoryuse — Part 1: General requirements, 2010, Corrigendum, 2011 .


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K.1.2.3 IEC Publications.


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International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20,Switzerland.

IEC 60034-1 Ed. 12.0, Rotating electrical machines — Part 1: Rating and performance, 2010.

IEC 60072-1 Ed. 6.0, Dimensions and output series for rotating electrical machines — Part 1: Framenumbers 56 to 400 and flange numbers 55 to 1080, 1991.

IEC 60204-1 Ed. 5.1, Safety of machinery — Electrical equipment of machines — Part 1: Generalrequirements, 2009.

IEC 60332-1-1 Ed. 1.0 [Series] 1 , Tests on electric and optical fibre cables under fire conditions— Part 1 Part 1-1 : Test on for vertical flame propagation for a single vertical insulated wire orcable Apparatus , 2004 2015 .

IEC 60364-4-41 Ed. 5.0, Electrical installations of buildings — Part 4-41: Protection for safety — Protectionagainst electric shock, 2005.

IEC 60364-5-53 Ed. 3.1 2 , Electrical Installations of Buildings — Part 5-53: Selection and Erection ofElectrical Equipment — Isolation, Switching and Control, 2006 2015 .

IEC 60417 DB [Database], Graphical symbols for use on equipment — Part 1: Overview and application,2002.

IEC 60529 Ed. 2.1 2 , Degrees of protection provided by enclosures (IP Code), 2001 2013, Corrigendum2, 2015 .

IEC 60621-3 Ed. 1.0, Electrical installations for outdoor sites under heavy conditions (including open-castmines and quarries). Part 3: General requirements for equipment and ancillaries, 1979. (Withdrawn)

IEC 60742 Ed. 1.0, Isolating transformers and safety isolating transformers, 1983. (Superseded by IEC61558-1)

IEC 60870-5-1 Ed. 1.0, Telecontrol equipment and systems. Part 5: Transmission protocols — Section One:Transmission frame formats, 1990.

IEC 60947-4-1 Ed. 3.1, Low-voltage switchgear and controlgear — Part 4-1: Contactors and motor-starters— Electromechanical contactors and motor-starters, 2012.

IEC 60947-5-1 Ed. 3.1, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices andswitching elements — Electromechanical control circuit devices, 2009.

IEC 60947-7-1 Ed. 3.0, Low-voltage switchgear and controlgear — Part 7-1 : Ancillary equipment —Section 1: Terminal blocks for copper conductors, 2009.

IEC 61010-1 Ed. 3.0, Safety requirements for electrical equipment for measurement, control, and laboratoryuse — Part 1: General requirements, 2010.

IEC 61310-1 Ed. 2.0, Safety of machinery — indication, marking and actuation — Part 1: Requirements forvisual, auditory and tactile signals, 2007.

IEC 61310-3 Ed. 2.0, Safety of machinery — indication, marking and actuation — Part 3: Requirements forthe location and operation of actuators, 2007.

IEC 61508 Ed. 2.0, [Series] Functional safety of electrical/electronic/programmable electronic safety-relatedsystems, 2010.

IEC 61558-1 Ed. 2.1, Safety of power transformers, power supply units and similar — Part 1: Generalrequirements and tests, 2009 2011 .

IEC 61800-5-2 Ed. 1.0, Adjustable speed electrical power drive systems — Part 5-2: Safety Requirements— Functional,2007.

IEC 62061 Ed. 1.1 2 , Safety of machinery — Functional safety of electrical, electronic and programmablecontrol systems, 2012 2015, Corrigendum 1, 2015 .

NOTE: The IEC publishes consolidated editions of its publications with all the amendments and corrigendaincluded with the base document. For example:

Edition 1.0 is a base document without any amendments.

Edition 1.1 is the base 1.0 edition consolidated with one amendment.

Edition 1.2 is the base 1.0 edition consolidated with two amendments.


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Edition 2.0 is the second edition of a base document. This may include new information combined as wellas amendments from edition 1.x.

Edition 2.1 is the second edition of a document consolidated with amendment 1 to that edition.

K.1.2.4 IEEE Publications.

Institute of Electrical and Electronics Engineers, Three Park Avenue, 17th Floor, New York, NY10016-5997.

IEEE 100 CD , The Authoritative Dictionary of IEEE Standard Terms, 7th edition, 2000.ANSI Y32.2/ 2013

IEEE 315/315A , IEEE Graphic Symbols for Electrical and Electronics Diagrams (Including ReferenceDesignation Letters), 1993.

IEEE 841, Standard for Petroleum and And Chemical Industry - Premium-Efficiency , Severe -Duty , Totally Enclosed Fan - Cooled (TEFC) Squirrel Squirell Cage Induction Motors up to andIncluding - Up To And Including 370 KW ( 500 HP ) , 1994 2009 .

K.1.2.5 ISO Publications.

International Organization for Standardization, 1, ch. de la Voie-Creuse, Case postale 56, CH-1211Geneva 20 ISO Central Secretariat, BIBC II, 8, Chemin de Blandonnet, CP 401, 1214 Vernier,Geneva , Switzerland .

ISO 7000, Graphical symbols for use on equipment — Index and synopsis , 2012 Registered Symbols ,2014 .

ISO 12100, Safety of machinery — Basic concepts, general General principles for design — Part 1:Basic terminology, methodology, Risk assessment and risk reduction , 2010.

ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General principlesfor design, 2006, Corrigendum 1, 2009 .

ISO 13849-2, Safety of machinery — Safety-related parts of control systems — Part 2: Validation, 2012.

ISO 13850, Safety of machinery — Emergency stop stop function — Principles for design, 2006 2015 .

K.1.2.6 NEMA Publications.

National Electrical Manufacturers Association, 1300 North 17th Street, Suite 1847 900 , RosslynArlington , VA 22209.

NEMA MG - 1, Motors and Generators, 2003 2014 .

NEMA 250, Enclosures for Electrical Equipment (1000 Volts Maximum), 2003 2014 .

K.1.2.7 SEMI Publications.

Semiconductor Equipment and Materials International, 3081 Zanker Road, San Jose, CA 95134.

SEMI S2, Environmental, Health, and Safety Guideline for Semiconductor Manufacturing Equipment, 20032010 .

SEMI S9, Safety Guideline for Electrical Design Verification Tests for Semiconductor ManufacturingEquipment, 2001. (Withdrawn 2007)

SEMI S22, Safety Guideline for the Electrical Design of Semiconductor Manufacturing Equipment, 20062010 .


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K.1.2.8 UL Publications.


ANSI/ UL 50, Standard for Enclosures for Electrical Equipment, 2007, revised 2012 .

ANSI/ UL 62, Standard for Flexible Cord and Fixture Wire, 2010 2014 .

ANSI/ UL 248-14, Standard for Low-Voltage Fuses — Part 14: Supplemental Fuses, 2000, Revised 20102015 .

ANSI/ UL 489, Standard for Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-BreakerEnclosures, 2009, revised 2014 .

ANSI/ UL 498, Standard for Attachment Plugs and Receptacles, 2001 2012 , Revised 2009 2014 .

ANSI/ UL 508, Standard for Industrial Control Equipment, 1999, Revised 2010 2013 .


ANSI/ UL 651, Standard for Schedule 40 and 80 Rigid , EB and A Rigid PVC Conduit and Fittings ,2005 2011 , Revised 2008 2014 .

ANSI/ UL 758, Appliance Wiring Material, 2006 2014 , Revised 2009 2014 .

ANSI/ UL 1004-1, Standard for Rotating Electrical Machines, 2008 2012 , Revised 2011 2013 .

ANSI/ UL 1077, Standard for Supplementary Protectors for Use in Electrical Equipment, 2005, Revised2010 2013 .

ANSI/ UL 1682, Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type, 2007 2013,revised 2014 .

ANSI/ UL 60950-1, Information Technology Equipment — Part I: General Requirements, 2007, Revised2011 2014 .

UL Subject 2237 Outline , Outline of Investigation for Multi-Point Interconnection Power Cable Assembliesfor Industrial Machinery, 2011 2015 .

IEC/UL 61010A-1, Electrical Equipment for Laboratory Use — Part 1: General Requirements, 2002.(Superseded by UL 61010-1).

UL 61010-1, UL Standard for Safety Electrical Equipment For Measurement, Control, andLaboratory Use; Part 1: General Requirements, 2004, revised 2015.

K.2 Informational References.

The following documents or portions thereof are listed here as informational resources only. They are not apart of the recommendations of this document.

IEC 61346 8 1346 -2, Industrial systems, installations and equipment and industrial products —Structuring principles and reference designations — Part 2: Classification of objects and codes for classes,2000-04. Systens, Installations And Eqipment And Industrial Products - Structuring Principles AndReference Designations - Part 2: Classification Of Objects And Codes For Classes, 2009 .(Supersedes IEC 61346-2)

IEC 61558-2-6, Safety of power transformers, power supply units and similar — Part 2: Particularrequirements for isolating transformers for general use, 1997-03 Of Transformers, Reactors, PowerSupply Units And Similar Products For Supply Voltages Up To 1,100 V - Part 2-6: ParticularRequirements And Tests For Safety Isolating Transformers And Power Supply Units IncorporatingSafety Isolating Transformers, 2009 .

ISO 5457, Technical product documentation — Sizes and layout of drawing sheets, 1999, Amendment 1,2010 .

ISO 7200, Technical product documentation — Data fields in title blocks and document headers, 2004.

K.3 References for Extracts in Informational Sections.

NFPA 70 ®, National Electrical Code ®, 2014 edition.


Referenced current SDO names, addresses, standard names, numbers, and editions.


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Public Input No. 1-NFPA 79-2015[Chapter 2]

Referenced current SDO names, addresses, standard names,numbers, and editions.


Submitter Full Name: Aaron Adamczyk

Organization: [ Not Specified ]

Street Address:

City:

State:

Zip:

Submittal Date: Tue Jun 16 00:51:54 EDT 2015

Committee Statement


Statement: The references have been updated to appropriate editions.

This DOE handbook gives guidance to industrial management when qualifying electrical maintenanceworkers to germane job tasks. It is presently used as a guide to all DOE projects and suggested byOSHA as a guide.


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Public Input No. 115-NFPA 79-2016 [ Section No. K.1.2.8 ]

K.1.2.8 UL Publications.


ANSI/UL 50, Standard for Enclosures for Electrical Equipment, 2007, Revised 2015 .

ANSI/UL 62, Standard for Flexible Cord and Fixture Wire, 2010, Revised 2014 .

ANSI/UL 248-14, Standard for Low-Voltage Fuses — Part 14: Supplemental Fuses, 2000, Revised 2010.

ANSI/UL 489, Standard for Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-BreakerEnclosures, 2009, Revised 2014 .

ANSI/UL 498, Standard for Attachment Plugs and Receptacles, 2001, Revised 2009 Revised 2014 .

ANSI/UL 508, Standard for Industrial Control Equipment, 1999, Revised 2010 2013 .


ANSI/UL 651, Standard for Schedule 40 and 80 Rigid PVC Conduit, 2005, Revised 2008 2014 .

ANSI/UL 758, Appliance Wiring Material, 2006, Revised 2009 2015 .

ANSI/UL 1004-1, Standard for Rotating Electrical Machines, 2008, Revised 2011 2015 .

ANSI/UL 1077, Standard for Supplementary Protectors for Use in Electrical Equipment, 2005, Revised2010 2015 .

ANSI/UL 1682, Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type, 2007, Revised2013 .

ANSI/UL 60950-1, Information Technology Equipment — Part I: General Requirements, 2007, Revised2011 2014 .

UL Subject 2237, Outline of Investigation for Multi-Point Interconnection Power Cable Assemblies forIndustrial Machinery, 2011, Revised 2015 .

IEC/UL 61010AUL 61010 -1 , Electrical Equipment

forFor Measurement, Control, and Laboratory Use

— Part 1; Part 1 : General Requirements ,

2002.2014


UL Referenced Standards were updated/revised as indicated with newer editions.

IEC/UL 61010A-1, Electrical Equipment for Laboratory Use — Part 1: General Requirements, 2002., has been Withdrawn and replaced by 61010-1UL 61010-1 , Electrical Equipment For Measurement, Control, and Laboratory Use; Part 1: General Requirements, 2014




Street Address:


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City:

State:

Zip:


Committee Statement


Statement: The references have been updated to appropriate editions.

This DOE handbook gives guidance to industrial management when qualifying electrical maintenanceworkers to germane job tasks. It is presently used as a guide to all DOE projects and suggested byOSHA as a guide.


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