FIRST DRAFT MEETING AGENDA · 2017-02-14 · FIRST DRAFT MEETING AGENDA NFPA Technical Committee on Electrical Equipment Maintenance (EEM-AAA) First Draft Meeting for 2019 Edition

National Fire Protection Association

1 Batterymarch Park, Quincy, MA 02169-7471 Phone: 617-770-3000 Å Fax: 617-770-0700 Å www.nfpa.org

FIRST DRAFT MEETING AGENDA

NFPA Technical Committee on Electrical Equipment Maintenance (EEM-AAA)First Draft Meeting for 2019 Edition of NFPA 70B

February 22 and 23, 2017

Teleconference / Web Meeting

Item No. Subject 17-9-1 Call to Order

17-9-2 Introduction of Members and Guests (Attachment A)

17-9-3 Approval of Previous Meeting Minutes (Attachment B)

17-9-4 Review of Regs and Committee Actions

17-9-5 Task Group Reports

17-9-6 Processing of Public Inputs (Attachment C)

17-9-7 Old Business

17-9-8 New Business

17-9-9 Adjournment

NFPA 70B First Draft Meeting Teleconference February 22 - 23, 2017 Page 1 of 55

Attachment A: Committee Roster


Address List No PhoneElectrical Equipment Maintenance EEM-AAA

National Electrical Code®

Christopher Coache02/14/2017

EEM-AAA

Kenneth J. Rempe

ChairSiemens Industry Inc.5400 Triangle ParkwayNorcross, GA 30092-2540National Electrical Manufacturers AssociationBranch Circuit Wiring DevicesAlternate: Charles L. Kaufman

M 3/2/2010EEM-AAA

Richard Bingham

PrincipalDranetz-BMI20 Pershing AvenueCranford, NJ 07016

M 4/1/1995

EEM-AAA

Thomas H. Bishop

PrincipalElectrical Apparatus Service Association1331 Baur BoulevardSt. Louis, MO 63132Electrical Apparatus Service Association

IM 7/1/1994EEM-AAA

William P. Cantor

PrincipalTPI Corporation302 New Mill LaneExton, PA 19341-2522Institute of Electrical & Electronics Engineers, Inc.

U 08/11/2014

EEM-AAA

Adria Corbett

PrincipalChubb Group of Insurance Companies55 Water StreetNew York, NY 10041Alternate: Erik G. Olsen

I 03/03/2014EEM-AAA

Timothy Crnko

PrincipalEaton’s Bussmann BusinessPO Box 14460St. Louis, MO 63178Alternate: Scott Brady

M 10/27/2005

EEM-AAA

James B. Evans

PrincipalSalisbury by Honeywell1280 Kemper Meadows DriveCincinnati, OH 45240-1632

M 08/11/2014EEM-AAA

Dennis M. Green

PrincipalTony Demaria Electric131 West F StreetWilmington, CA 90744-5533

IM 08/11/2014

EEM-AAA

Ryan Grimes

PrincipalToyota Motor Engineering & Manufacturing North America,Inc.Manager, Vehicle Plant Projects37 Atlantic AvenueErlanger, KY 41018-3151

U 07/29/2013EEM-AAA

Jeffrey Hall

PrincipalUL LLC12 Laboratory DrivePO Box 13995Research Triangle Park, NC 27709-3995

RT 1/1/1987

EEM-AAA

William R. Harris

PrincipalGeneral Motors Company30200 Mound Road, Building 1-11Warren, MI 48092-2025

U 03/03/2014EEM-AAA

Palmer L. Hickman

PrincipalElectrical Training Alliance5001 Howerton Way, Suite NBowie, MD 20715-4459International Brotherhood of Electrical WorkersAlternate: Christopher E. Kelly

L 4/14/2005





EEM-AAA

Mark C. Horne

PrincipalGeorgia Power CompanyPO Box 1220Columbus, GA 31902Electric Light & Power Group/EEIAlternate: Leonard Fiume

U 8/9/2011EEM-AAA

David Huffman

PrincipalPower Systems Testing Company4688 West Jennifer, #105Fresno, CA 93722InterNational Electrical Testing Association

IM 10/28/2008

EEM-AAA

Darrel Johnson

PrincipalCity of Jacksonville815 New Bridge StreetJacksonville, NC 28541

E 03/03/2014EEM-AAA

Alan Manche

PrincipalSchneider Electric1601 Mercer RoadLexington, KY 40511-1025National Electrical Manufacturers AssociationCircuit Protection

M 1/12/2000

EEM-AAA

Ahmad A. Moshiri

PrincipalLiebert Corporation610 Executive Campus DriveWesterville, OH 43082Alternate: David Goodrich

M 1/1/1992EEM-AAA

Robert Neary

PrincipalSEA Limited795 Cromwell Park Drive, Suite NGlen Burnie, MD 21061Alternate: Aaron Butcher

SE 03/07/2013

EEM-AAA

Timothy Schultheis

PrincipalT.S.B Inc., Schultheis Electric304 Sanford StreetPO Box 798Latrobe, PA 15650National Electrical Contractors Association

IM 11/30/2016EEM-AAA

John E. Staires

PrincipalCity of Glenpool, Oklahoma12205 South Yukon AvenueGlenpool, OK 74033-6635

E 08/09/2012

EEM-AAA

Robert Urdinola

PrincipalUS Department of StateOffice of Overseas Buildings OperationsSA-6, Room 412-IWashington, DC 20522

U 9/30/2004EEM-AAA

James R. White

PrincipalShermco Industries, Inc.2425 East Pioneer DriveIrving, TX 75061Alternate: Ron Widup

IM 10/27/2005

EEM-AAA

Scott Brady

AlternateEaton Corporation560 North 54th Street, Suite 3Chandler, AZ 85226-2551Principal: Timothy Crnko

M 08/11/2014EEM-AAA

Aaron Butcher

AlternateSEA Limited4665 Allen Road, Suite AStow, OH 44224Principal: Robert Neary

SE 07/29/2013





EEM-AAA

Leonard Fiume

AlternateNational Grid144 Kensington AvenueBuffalo, NY 14214-2726Electric Light & Power Group/EEIPrincipal: Mark C. Horne

U 8/9/2011EEM-AAA

David Goodrich

AlternateLiebert Corporation610 Executive Campus DriveWesterville, OH 43082Principal: Ahmad A. Moshiri

M 1/12/2000

EEM-AAA

Charles L. Kaufman

AlternateMiller Electric Manufacturing Company1635 West Spencer StreetPO Box 1079Appleton, WI 54912-1079National Electrical Manufacturers AssociationPrincipal: Kenneth J. Rempe

M 03/03/2014EEM-AAA

Christopher E. Kelly

AlternateJATC for Nassau & Suffolk Counties370 Motor ParkwayHauppauge, NY 11788International Brotherhood of Electrical WorkersPrincipal: Palmer L. Hickman

L 7/23/2008

EEM-AAA

Erik G. Olsen

AlternateChubb Group of Insurance Companies132 Naughright RoadLong Valley, NJ 07853-3277Principal: Adria Corbett

I 3/2/2010EEM-AAA

Ron Widup

AlternateShermco Industries2425 East Pioneer DriveIrving, TX 75061Principal: James R. White

IM 10/27/2005

EEM-AAA

Albert J. Reed

Member Emeritus1940 West Turner Street, Apt. 507Allentown, PA 18104

1/1/1976EEM-AAA

Christopher Coache

Staff LiaisonNational Fire Protection Association1 Batterymarch ParkQuincy, MA 02169-7471

05/29/2014


Attachment B: Previous Meeting Minutes


NFPA TECHNICAL COMMITTEE ON Electrical Equipment Maintenance (EEM-AAA) Second Draft Meeting for NFPA 70B

December 3, 2014 Web / Teleconference Meeting 11:00 AM – 5:00 PM Eastern

Meeting Minutes 14-12-1 Call to Order The Chair called the teleconference meeting to order. (11:00 a.m. Eastern) The NFPA Rules of Conduct, Second Draft rules and explanations, and anticipated timing of the remaining processes required for issuance of 2015 edition of 70B was reviewed. 14-12-2 Introduction of Members and Guests Members (Principal and Alternates) identified themselves through a roll call. There were no guests on the call. In addition to the Chair and NFPA Staff Liaison, there were 20 participants on the call (14 Principal Members and 6 Alternate Members) 14-12-3 Approval of Previous Meeting Minutes Minutes of the previous meeting were approved (vote unanimous) 14-12-4 Processing of Public Comments There were six (6) public comments and three (3) correlating committee comments discussed and actions taken. 14-12-5 Old Business There was no old business discussed. 14-12-6 New Business There were three new business items discussed and resolved. 14-12-7 Adjournment A motion was made and the meeting was adjourned at 1:30 p.m. Eastern. (See next page)


Attendees of Second Draft Teleconference Meeting

12/3/14 Ken Rempe: 70B Chair Chris Coache: NFPA 70B Staff Liaison Jim White: 70B Secretary* *Ron Widup: 70B Secretary for this meeting only Principal Members Present (fourteen total) 1. Rich Bingham 2. Tom Bishop 3. Brian Brecheisen 4. Adria Corbett 5. Tim Crnko 6. Dennis Green 7. Ryan Grimes

8. Jeff Hall 9. Bill Harris 10. Mark Horne 11. Dave Huffman 12. Alan Manche 12. John Staires 14. Jim White

Alternate Members Present (six total) 1. Scott Brady 2. Aaron Butcher 3. Bill Cantor 4. Leonard Fiume 5. David Goodrich 6. Ron Widup Principal Members Not Present 1. Palmer Hickman 2. Darrel Johnson 3. Ahmad Moshiri 4. Robert Neary 5. Gregory Orr 6 Christopher Pavese 7. Robert Urdinola Alternate Members Not Present 1. James Evans 2. Charles Kaufman 3. Chris Kelly 4. Erik Olsen 5. Albert Reed (Member Emeritus)

-End of report- Ron Widup, Shermco Industries


Attachment C: NFPA 70B Public Input Report


Public Input No. 46-NFPA 70B-2016 [ Chapter 2 ]

Chapter 2 Referenced Publications

2.1 General.

The documents or portions thereof listed in this chapter are referenced within this recommended practiceand should be considered part of the recommendations 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.

NFPA 110, Standard for Emergency and Standby Power Systems, 2016 edition.

NFPA 496, Standard for Purged and Pressurized Enclosures for Electrical Equipment, 2013 edition.

NFPA 780, Standard for the Installation of Lightning Protection Systems, 2014 edition.

NFPA 791, Recommended Practice and Procedures for Unlabled Electrical Equipment Evaluation , 2014edition.

NFPA 1600® , Standard on Disaster/Emergency Management, and Business Continuity/Continuity ofOperations Programs, 2016 edition.

2.3 Other Publications.

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

1 of 44 1/17/2017 11:22 AM


2.3.1 ASTM Publications.

American Society for Testing and Materials ASTM International , 100 Barr Harbor Drive, P.O. Box C700,West Conshohocken, PA 19428-2959.

ASTM D92, Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester, 2012b.

ASTM D445, Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids andCalculation of Dynamic Viscosity,2012 2015a .

ASTM D664, Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration,2011a.

ASTM D877/D877 , Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids UsingDisk Electrodes, 2013.

ASTM D923, Standard Practices for Sampling Electrical Insulating Liquids, 2007 2015 .

ASTM D924, Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity(Dielectric Constant) of Electrical Insulating Liquids, 2008 2015 .

ASTM D971, Standard Test Method for Interfacial Tension of Oil Against Water by the Ring Method, 2012.

ASTM D974, Standard Test Methods for Acid and Base Number by Color-Indicator Titration, 2012 2014with editorial change 2, 2016 .

ASTM D1298, Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity ofCrude Petroleum and Liquid Petroleum Products by Hydrometer Method, 2012b.

ASTM D1500, Standard Test Method for ASTM Color of Petroleum Products (ASTM Color Scale), 2012.

ASTM D1524, Standard Test Method for Visual Examination of Used Electrical Insulating Oils of PetroleumOrigin in the Field, 1994 (revised 2010) 2015 .

ASTM D1533, Standard Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration,2012.

ASTM D1816, Standard Test Method for Dielectric Breakdown Voltage of Insulating Oils of PetroleumOrigin Using VDE Electrodes, 2012.

ASTM D2129, Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-CobaltScale), 2005 (revised , reapproved 2010 ) .

ASTM D2472, Standard Specification for Sulfur Hexafluoride, 2000 (revised 2006) 2015 .

ASTM D3284, Standard Practice for Combustible Gases in the Gas Space of Electrical Apparatus UsingPortable Meters, 2005 (revised , reapproved 2011 ) .

ASTM D3612, Standard Test Method for Analysis of Gases Dissolved in Electrical Insulating Oil by GasChromatography, 2002 (revised , reapproved 2009 ) .

2.3.2 EASA Publications.

Electrical Apparatus Service Association, 1331 Baur Blvd, St. Louis, MO 63132.

ANSI/EASA AR100, Recommended Practice for the Repair of Rotating Electrical Apparatus, 2010.


2 of 44 1/17/2017 11:22 AM


2.3.3 IEEE Publications.


3 of 44 1/17/2017 11:22 AM


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

ANSI/ IEEE 43, Recommended Practice for Testing Insulation Resistance of Rotating Machinery, 20002013 .

ANSI/ IEEE 80, Guide for Safety in AC Substation Grounding, 2000 2013 .

IEEE 81, Guide for Measuring Earth Resistivity, Ground Impedance and Earth Surface Potentials of aGround System, 2012.

ANSI/ IEEE 95, Recommended Practice for Insulation Testing of AC Electric Machinery (2300 V and Above)with High Direct Voltage, 2002, reaffirmed 2012 .

ANSI/ IEEE 141, Recommended Practice for Electric Power Distribution for Industrial Plants (IEEE RedBook) ,1993, revised 1999.

ANSI/ IEEE 142, Recommended Practice for Grounding of Industrial and Commercial Power Systems(IEEE Green Book) , 2007, Errata, 2014 .

ANSI/ IEEE 241, Recommended Practice for Electric Power Systems in Commercial Buildings (IEEE GrayBook) , 1990.

ANSI/ IEEE 242, Recommended Practice for Protection and Coordination of Industrial and CommercialPower Systems (IEEE Buff Book) , 2001, Errata, 2003 .

ANSI/ IEEE 399, Recommended Practice for Industrial and Commercial Power Systems Analysis (IEEEBrown Book) , 1997.

ANSI/ IEEE 400, Guide for Field Testing and Evaluation of the Insulation of Shielded Power Cable Systems,2012.

IEEE 400.1, Guide for Field Testing of Laminated Dielectric, Shielded Power Cable Systems Rated 5kV andAbove with High Direct Current Voltage, 2007.

IEEE 400.2, Guide for Field Testing of Shielded Power Cable Systems Using Very Low Frequency (VLF)Less Than 1 Hertz, 2013.

IEEE 400.3, Guide for Partial Discharge Testing of Shielded Power Cable Systems in a Field Environment,2006 2015 .

ANSI/IEEE 446, Recommended Practice for Emergency and Standby Power Systems for Industrial andCommercial Applications (IEEE Orange Book) , 1995, revised 2000.

ANSI/IEEE 450, Recommended Practice for Maintenance, Testing and Replacement of Vented Lead-AcidBatteries for Stationary Applications, 2010.

ANSI/IEEE 493, Recommended Practice for the Design of Reliable Industrial and Commercial PowerSystems (IEEE Gold Book) , 2007.

ANSI/IEEE 519, Recommended Practices and Requirements for Harmonic Control in Electrical PowerSystems, 1992 2014 .

IEEE 637, Guide for Reclamation of Insulating Oil and Criteria for Its Use, 1985. ANSI/ (Superseded byIEEE C57.637)

IEEE 1100, Recommended Practice for Powering and Grounding Electronic Equipment (IEEE EmeraldBook) , 2005.

IEEE 1106, Recommended Practice for Installation, Maintenance, Testing and Replacement of VentedNickel-Cadmium Batteries for Stationary Applications, 2005, revised 2011 2015 .

ANSI/IEEE 1125, Guide for Moisture Measurement and Control in SF6 Gas-Insulated Equipment, 1993,

revised 2000. (Superseded by IEEE C37.122.5)

IEEE 1159, Recommended Practice on Monitoring Electric Power Quality, 2009.

IEEE 1188, Recommended Practice for Maintenance, Testing and Replacement of Valve-Regulated LeadAcid (VRLA) Batteries for Stationary Applications, 2005 2010 with 2014 amendment .

IEEE 1578, IEEE Recommended Practice for Stationary Battery Electrolyte Spill Containment andManagement, 2007.

IEEE 1584 ™ , Guide for Performing Arc Flash Hazards Calculations, 2002 (with Amendment 1 and 2).

IEEE 1657, IEEE Recommended Practice for Personnel Qualifications for Installation and Maintenance of


4 of 44 1/17/2017 11:22 AM


Stationary Batteries, 2009 with 2015 amendment .

IEEE 3007.2, IEEE Recommended Practice for the Maintenance of Industrial and Commercial PowerSystems, 2010.

ANSI/Accredited Standards Committee IEEE C2, National Electrical Safety Code® (NESC®), 2012201 7 .

ANSI/IEEE C37.13, Standard for Low-Voltage AC Power Circuit Breakers Used in Enclosures, 2008 2015 .

IEEE C37.20.1, Standard for Metal-Enclosed Low-Voltage Power Voltage (1000 Vac and Below, 3200Vdc and Below) Power Circuit Breaker Switchgear, 2002 2015 .

IEEE C37.23, Standard for Metal-Enclosed Bus. , 2003 2015 .

IEEE C37.122.1, IEEE Guide for Gas-Insulated Substations, 1993,revised 2002 Substation s RatedAbove 52 Kv , 2014 .

IEEE C37.122.5, Guide for Moisture Measurement and Control SF 6 Gas-Insulated Equipment,

2013 .

ANSI/IEEE C57.104, Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers, 2008.

ANSI/IEEE C57.106, Guide for Acceptance and Maintenance of Insulating Oil in Equipment, 2006 2015 .

ANSI/IEEE C57.110, Recommended Practice for Establishing Liquid-Filled and Dry-Type Power andDistribution Transformer Capability When Supplying Nonsinusoidal Load Currents, 2008.

ANSI/IEEE C57.111, Guide for Acceptance of Silicone Insulating Fluid and Its Maintenance inTransformers, 1989 1995 ,revised reaffirmed 2009.

ANSI/IEEE C57.121, Guide for Acceptance and Maintenance of Less-Flammable Hydrocarbon Fluid inTransformers, 1998.

IEEE C57.637, Guide for the Reclaimation of Mineral Insulating Oil and Criteria for its Use, 2015.

2.3.4 ITI Publications.

Information Technology Industry Council, 1250 Eye Street NW, Suite 200, Washington, DC 20005.202-737-8880. http://www.itic.org.

ITI (CBEMA) Curve Application Note, 2000.

2.3.5 NEMA Publications.

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

Evaluating Water-Damaged Electrical Equipment, 2014.

Evaluating Fire- and Heat-Damaged Electrical Equipment, 2013.

ANSI/NEMA AB 4, Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit BreakersUsed in Commercial and Industrial Applications, 2009.

ANSI/NEMA C84.1, Electric Power Systems and Equipment, Voltage Ratings (60 Hertz), 2011.

ANSI/NEMA KS 3, Guidelines for Inspection and Preventive Maintenance of Switches Used in Commercialand Industrial Applications, 2010.

NEMA MG 1, Motors and Generators, 2011 2016 .

ANSI/NEMA PB 2.1, General Instructions for Proper Handling, Installation, Operation, and Maintenance ofDead Front Distribution Switchboards Rated 600 Volts or Less, 2013.

ANSI/ NEMA WD 6, Wiring Devices and - Dimensional Specifications, 2012 2016 .

2.3.6 NETA Publications.

InterNational Electrical Testing Association, P.O. Box 687, Morrison, CO 80465 3050 Old Centre Ave.,Suite 102 , Portage, MI 49024 .

ANSI/NETA ATS, Standard for Acceptance Testing Specifications for Electrical Power DistributionEquipment and Systems, 2013.

ANSI/NETA MTS, Standard for Maintenance Testing Specifications for Electrical Power DistributionEquipment and Systems, 2011 2015 .


5 of 44 1/17/2017 11:22 AM


2.3.7 OSHA Publications.

Occupational Safety and Health Administration, 200 Constitution Ave., NW, Washington, DC 20210.

OSHA Safety & Health Information Bulletin (SHIB), “Certification of Workplace Products by NationallyRecognized Testing Laboratories,” 02-16-2010.

2.3.8 UL Publications.

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

ANSI/UL 489, Molded-Case Circuit Breakers, Molded-Case Switches and Circuit Breaker Enclosures,Twelfth edition, 2013.

ANSI/UL 943, Standard for Ground-Fault Circuit Interrupters, Fourth 5th edition, 2006 (revised 2010)2016 .

UL 1436, Outlet Circuit Testers and Similar Indicating Devices, Fifth edition, 2014.

UL Firefighter Safety and Photovoltaic Installations Research Project, November 2011.

2.3.9 U.S. Government Publications.

U.S. Government Printing Government Publishing Office, 732 North Capitol Street, NW, Washington,DC 20402 20401 - 9328 0001 .

Federal Emergency Management Agency (FEMA), FEMA P-348, Protecting Building Utilities from FloodDamage, 1999 updated 2012.

Title 29, Code of Federal Regulations, Part 1910.

Title 29, Code of Federal Regulations, Part 1910.94(a), “Occupational Health and Environmental Control —Ventilation.”

Title 29, Code of Federal Regulations, Part 1910.94(a), “Occupational Health and Environmental Control —Ventilation.”

Title 29, Code of Federal Regulations, Part 1910.146, “Permit-Required Confined Spaces.”

Title 29, Code of Federal Regulations, Part 1910.242(b), “Hand and Portable Powered Tools and OtherHand Held Equipment.”

Title 29, Code of Federal Regulations, Part 1910.269, “Electric Power Generation, Transmission, andDistribution,” Paragraph (e), Enclosed Spaces.

Title 29, Code of Federal Regulations, Part 1910.331 through Part 1910.335, “Safety Related WorkPractices.”

Title 29, Code of Federal Regulations, Part 1926.

Title 40, Code of Federal Regulations, Part 761, “Protection of Environment — Polychlorinated Biphenyls(PCBs) Manufacturing, Processing, Distribution in Commerce, and Use Prohibitions.”

TM 5-694, Commissioning of Electrical Systems for Command, Control, Communications, Computer,Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities, 2006.

TM 5-698-1, Reliability/Availability of Electrical and Mechanical Systems for Command, Control,Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities, 2007.

TM 5-698-2, Reliability-Centered Maintenance (RCM) for Command, Control, Communications, Computer,Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities, 2006.

TM 5-698-3, Reliability Primer for Command, Control, Communications, Computer, Intelligence,Surveillance, and Reconnaissance (C4ISR) Facilities, 2005.

Toxic Substances Control Act, Environmental Protection Agency, www.epa.gov/agriculture/lsca.html.

U.S. General Services Administration and U.S. Department of Energy, Building Commissioning Guide,2009.


6 of 44 1/17/2017 11:22 AM


2.3.10 Other Publications.

ABB Power T & D Company, Inc., Instruction Book PC-2000 for Wecosol TM Fluid-Filled Primary andSecondary Unit Substation Transformers.

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

Penn-Union Catalog, http://www.penn-union.com/Services/Literature.

PowerTest Annual Technical Conference, Flood Repair of Electrical Equipment, Pat Beisert, ShermcoIndustries, March 12, 2009.

Square D Catalog, Schneider Electric, www.schneider-electric.com/us.

Square D Services, Procedures for Startup and Commissioning of Electrical Equipment, PDF available athttp://static.schneider-electric.us/docs/Electrical%20Distribution/Services/New%20Installation%20Services/O18OIB0001.pdf

2.4 References for Extracts in Recommendations Sections.

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

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

Statement of Problem and Substantiation for Public Input

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

Related Public Inputs for This Document

Related Input Relationship

Public Input No. 47-NFPA 70B-2016 [Chapter D]

Submitter Information Verification

Submitter Full Name: Aaron Adamczyk

Organization: [ Not Specified ]

Street Address:

City:

State:

Zip:

Submittal Date: Mon May 30 22:31:06 EDT 2016


7 of 44 1/17/2017 11:22 AM


Public Input No. 70-NFPA 70B-2017 [ Section No. 2.3.1 ]

2.3.1 ASTM Publications.

American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.

ASTM D92, Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester, 2012b2016a .

ASTM D445, Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids andCalculation of Dynamic Viscosity,2012 2015a .

ASTM D664, Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration,2011a e1 .

ASTM D877/D877M , Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids UsingDisk Electrodes,2013.

ASTM D923, Standard Practices for Sampling Electrical Insulating Liquids, 2007 2015 .

ASTM D924, Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity(Dielectric Constant) of Electrical Insulating Liquids, 2008 2015 .

ASTM D971, Standard Test Method for Interfacial Tension of Oil Against Water by the Ring Method, 2012.

ASTM D974, Standard Test Methods for Acid and Base Number by Color-Indicator Titration, 2012 2014e2 .

ASTM D1298, Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity ofCrude Petroleum and Liquid Petroleum Products by Hydrometer Method, 2012b.

ASTM D1500, Standard Test Method for ASTM Color of Petroleum Products (ASTM Color Scale),2012.

ASTM D1524, Standard Test Method for Visual Examination of Used Electrical Insulating Oils of PetroleumOrigin in the Field, 1994 (revised 2010) 2015 .

ASTM D1533, Standard Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration,2012.

ASTM D1816, Standard Test Method for Dielectric Breakdown Voltage of Insulating Oils of PetroleumOrigin Using VDE Electrodes, 2012.

ASTM D2129, Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-CobaltScale), 2005 (revised 2010).

ASTM D2472, Standard Specification for Sulfur Hexafluoride, 2000 (revised 2006) 2015 .

ASTM D3284, Standard Practice for Combustible Gases in the Gas Space of Electrical Apparatus UsingPortable Meters, 2005 (revised 2011).

ASTM D3612, Standard Test Method for Analysis of Gases Dissolved in Electrical Insulating Oil by GasChromatography, 2002 (revised 2009).


updates - where there is a bracket it means that ASTM reapproved the standard without revision


Submitter Full Name: Marcelo Hirschler

Organization: GBH International

Street Address:

City:

State:


8 of 44 1/17/2017 11:22 AM


Zip:

Submittal Date: Thu Jan 05 17:20:27 EST 2017


9 of 44 1/17/2017 11:22 AM


Public Input No. 69-NFPA 70B-2017 [ Section No. 9.1 [Excluding any Sub-Sections] ]

Electrical studies are an integral part of system design, operations, and maintenance. These engineeringstudies generally cover the following areas:

(1) Short-circuit studies

(2) Coordination studies

(3) Load-flow studies

(4) Reliability studies

(5) Risk Assessment study

(6) System grounding studies


A system grounding study should be undertaken to determine if the (usually solidly grounded) system is suitable for impedance grounding. There are methods for migrating solidly grounded power systems to impedance (resistance and/or reactive) systems. While there are exceptions, impedance grounded systems generally reduce incident energy for most power systems -- the top most goal for electrical professionals and facility managers in the education, healthcare and other industries. A committee under the IEEE Industrial Applications Society - the Education & Healthcare Facilities Committee -- has been advocating for recognition of this concept across the NFPA 70-suite. Background information is available at the link below:

http://sites.ieee.org/icps-ehe/2016/10/12/resistance-grounding-in-campus-power-systems-to-reduce-flash-hazard-breakout-teleconference-october/

http://sites.ieee.org/icps-ehe/2016/09/25/university-of-california-berkeley-lawrence-national-lab-power-system-teleconference/


Submitter Full Name: Michael Anthony

Organization: StandardsMichigan.COM

Affilliation: IEEE Education & Healthcare Facilities Commitee

Street Address:

City:

State:

Zip:



10 of 44 1/17/2017 11:22 AM



11.2.2 Routine Maintenance Tests.

Routine maintenance tests are tests that are performed at regular intervals over the service life ofequipment. These tests normally are performed concurrently with preventive maintenance on theequipment. Routine testing includes mechanical cycling of MCCBs and disconnects, thermography,cleaning, inspection procedures, voltage and current measurements, power quality measurements, orother tests that do not involve invasive disconnecting and reconnecting of equipment to perform. Routinetesting does not include Special Maintenance Tests, such as those described in Section 11.2.3.


Section 11.4 gives a frequency for "routine testing" of 6 months to 3 years, and some AHJ's have interpreted this to mean that injection testing of all circuit breakers is justified to be done on a 6-month to 3-year basis because "routine testing" is not clearly defined. I am also making a suggestion for clarification of 11.2.3 and 11.4 to make this problem go away.



Public Input No. 61-NFPA 70B-2016 [Section No. 11.2.3]

Public Input No. 62-NFPA 70B-2016 [Section No. 11.4]


Submitter Full Name: Mark Babb

Organization: Idaho National Laboratory

Street Address:

City:

State:

Zip:

Submittal Date: Wed Dec 07 10:39:14 EST 2016


11 of 44 1/17/2017 11:22 AM



11.2.3 Special Maintenance Tests.

Special maintenance tests are tests performed on equipment that is thought or known to be defective orequipment that has been subjected to conditions that possibly could adversely affect its condition oroperating characteristics. Examples of special maintenance tests are cable fault–locating tests or testsperformed on a circuit breaker that has interrupted a high level of fault current, such as inverse-time andinstanteneous trip testing, insulation resistance tests, contact/pole resistance tests, and rated hold-in tests,all of which require special equipment and cannot reasonably be done in the same time frame as routinetesting . Special maintenance tests should not be routinely scheduled, but performed when required byinspection, routine test failure, abnormal conditions or events suggest that failure or damage may haveoccurred or be imminent.


Specifying what is intended by "special maintenance tests" and making a distinction between them and "routine testing" will provide less conflict between this Code and other Standards (IEEE 1458 Section 8, NEMA AB-4 Section 5 versus Section 6, IEEE Std 1015-2006 Section 7.3, etc.) which indicate that these tests are not routine, but have special purpose and require special consideration of setup and execution.



Public Input No. 60-NFPA 70B-2016 [Section No. 11.2.2] Similar clarification

Public Input No. 62-NFPA 70B-2016 [Section No. 11.4]




Street Address:

City:

State:

Zip:



12 of 44 1/17/2017 11:22 AM


Public Input No. 62-NFPA 70B-2016 [ Section No. 11.4 ]

11.4 Frequency of Tests.

Most routine testing can best be performed concurrently with (and is generally part of) routine preventivemaintenance, because a single outage will serve to allow both procedures. For that reason, the frequencyof testing generally coincides with the frequency of maintenance. The optimum cycle depends on the useto which the equipment is put and the operating and environmental conditions of the equipment. In general,this cycle can range from 6 months to 3 years, depending on conditions and equipment use. Annex K andL of this Standard contain guidelines for frequency of performing different types of testing; however thefrequency of testing for any particular installation must consider the environment, age, condition, reliabilityrequirements, and duty cycle of the involved equipment in developing a preventative maintenance plan.The difficulty of obtaining an outage should never be a factor in determining the frequency of testing andmaintenance. Equipment for which an outage is difficult to obtain is usually the equipment that is most vitalin the operation of the electrical system. Consequently, a failure of this equipment would most likely createthe most problems relative to the continued successful operation of the system. In addition to routinetesting, Special maintenance tests should be performed any time equipment has been subjected toconditions that possibly could have caused it to be unable to continue to perform its design functionproperly, regardless of the inconvenience of performing the test . Engineering judgment is required todetermine when such tests are warranted with consideration of the potential for personnel harm and furtherequipment failure should the involved equipment fail to function as intended.


This paragraph is vague and easily misinterpreted to mean that Special Maintenance Testing should be done on a routine - 6 month to 3 years - basis. Other suggested changes clarify the difference between routine and special maintenance testing. The "6 months to 3 years" clause contradicts the periodicity of testing suggested by Annex K and L, and since this clause IS part of the Standard, overrides the Annexes (which are specifically excluded as part of the Standard), which is probably a bad idea. Since frequency of testing is highly dependent on the conditions cited by the change, removal of a specific time frame for periodicity in the Standard is recommended.



Public Input No. 60-NFPA 70B-2016 [Section No.11.2.2]

defines "routine maintenance" or "routinetesting"

Public Input No. 61-NFPA 70B-2016 [Section No.11.2.3]

defines "special maintenance tests"




Street Address:

City:

State:

Zip:



13 of 44 1/17/2017 11:22 AM


Public Input No. 57-NFPA 70B-2016 [ Section No. 11.10.2.3 ]

11.10.2.3

The testing of electromechanical trip devices or solid-state devices by the primary injection method requiresthe use of a high-current test set capable of producing sufficient current at low voltage to operate each ofthe elements of the trip device. This test should have means of adjusting the amount of current applied tothe trip device and a cycle and second timer to measure the amount of time to trip the breaker at eachcurrent setting. At least one test should be made in the range of each element of the trip device. The longtime-delay element ordinarily should be tested at approximately 300 percent of its setting. The shorttime-delay element should be tested at 150 percent to 200 percent of its setting. The instantaneouselement should be tested for pickup. For the test of the instantaneous element, the applied current shouldbe symmetrical without an asymmetrical offset, or random errors will be introduced. As-found and as-lefttests should be performed if any need of adjustments is found. Direct primary current injection testing ofmolded case circuit breakers is dependent on solid connections to conductors, adequate heat removalduring the test, and the magnetic characteristics of the test device. Primary injection testing is a SpecialMaintenance Test (11.2.3) that cannot be done reliably with the circuit breaker in place, therefore it isnecessary to remove the circuit breaker from the enclosure and install it securely in a test device that isconstructed for the purpose, and to connect the testing wires with the manufacturer's prescribed torque onboth input and output of the circuit breaker under test.


Comment: There has been a great deal of controversy generated because of the ambiguity of NFPA 70B regarding injection testing. The text leads one to believe that the code panel intended this to be a Special Maintenance Test, but in Annex L, it is lumped in with "electrical tests" to be done on a 3 to 5 year basis. The purpose of this clarification is to instruct that this test is not intended to be a routine maintenance like cycling or thermography, but rather a test to be done when there is need. Note that Square D (the only manufacturer that gives unambiguous instructions regarding MCCB testing) in their Field Testing and Maintenance Guide (Instruction Bulletin 0600IB1201 R07/13, page 7, says to "conduct performance tests (including injection testing) only if inspection or daily operation indicates that a circuit breaker may not be adequately providing the protection required by its application." IEEE Std 1458 Section 8 mandates the removal of the breaker from the panel for both inverse time overcurrent trip test (8.6) and for Instantaneous overcurrent trip test (8.7) - "NOTE - The circuit breaker shall be removed from equipment for this test." NEMA AB-4 lists these tests under Section 6, which is NOT recommended testing, as Section 5 states, "These steps (section 5) cover the only maintenance that should be performed on molded case circuit breakers unless specifically authorized by the circuit breaker manufacturer."




Street Address:

City:

State:

Zip:

Submittal Date: Thu Nov 03 15:37:39 EDT 2016


14 of 44 1/17/2017 11:22 AM


Public Input No. 59-NFPA 70B-2016 [ Section No. 11.10.5 [Excluding any Sub-Sections]

]

When performing insulated-case/molded-case circuit-breaker testing, the criteria in 11.10.5.1 through11.10.5.3 should be utilized.

(Added section) Mechanical Testing. Molded case circuit breakers contain a lubricant that can hardenover time, causing the circuit breaker to fail to trip under overcurrent conditions that the breaker is intendedto protect against. This can be prevented by periodic cycling of molded case circuit breakers. Therecommended procedure for this is to use the "trip-to-test" feature of the circuit breaker if it is equipped withthis feature. Either trip / turn off/ turn on or turn off / turn on the circuit breaker by hand several times (withthe circuit breaker de-energized). Any breaker that exhibits any misalignment, mushiness, or other physicaldifferences between the breaker under test and other circuit breakers of the same manufacturer, type, andsize should be replaced.

(Added section) Thermographic inspection. Operating circuit breakers often exhibit heating at poorconnections or resistive contacts while conducting electrical current. Thermography can detect these (oftentiny) differences in heat, even with the dead-front in place on a circuit breaker panel. While it is desireableto remove the dead-front for thermographic inspection, the value of regular thermography even with thedead-front in place is high, as this is the only "predictive" type maintenance that is useful for detectingimpending failures of molded case circuit breakers. Two- and three- pole breakers should be comparedpole-to-pole, and single pole breakers should be compared over time (comparing photographs over time) todetermine if deterioration is occurring. It is important that the thermographer have training in the use of athermographic camera, as reflections from the surface of the breaker, mis-settings of emittance, and othervariables can lead to erroneous conclusions.

(Added section) Clean and inspect. Molded case circuit breakers are intended to function with minimummaintenance throughout their lifetime, but that can be severely interrupted by dirt, high humidity, saltyatmosphere, water, vermin, and extremes of temperature. Circuit breakers should be routinelyde-energized and carefully inspected, and the panels cleaned carefully to extend that lifetime. Circuitbreaker (or panel) replacement is indicated when breakers exhibit heating at connections (both to thesupply buss works and to the load wiring), bubbling, blistering, cracked or warped cases, corrosion ofconductors, or insulation breakdown. Regular careful cleaning with non-conductive mediums (usuallydusting, or in severe cases, clean water on the external surfaces of the breaker and panel interior) canextend the useful life of circuit breakers considerably.


The text of NFPA 70B does not address adequately the subject of routine maintenance (11.2.2), specifically cycling of breakers, thermography, and normal cleaning and inspection. These three maintenance items are the most important, and adequately address the requirements of NFPA 70E to "maintain circuit breakers in accordance with manufacturer's instructions and consensus industry standards". They need to be clearly stated.




Street Address:

City:

State:

Zip:



15 of 44 1/17/2017 11:22 AM


Public Input No. 58-NFPA 70B-2016 [ Section No. 11.10.5.1.1 ]

11.10.5.1.1

Insulated-case/molded-case circuit breakers are available in a wide variety of sizes, shapes, and ratings.Voltage ratings, by standard definitions, are limited to 600 volts, although special applications have beenmade to 1000 volts. Current ratings are available from 10 amperes through 4000 amperes. Insulated-case/molded-case circuit breakers can be categorized generally by the types of trip units employed asdescribed in Section 17.5.

Routine Maintenance Tests (11.2.2) of molded case circuit breakers is generally limited to mechanicaltesting (cycling), thermographic inspeciton, and cleaning/inspection. On circuit breaker equipped forsecondary injection testing, this test can be done as a routine test if desired. Special Maintenance Tests(11.2.3) includes Insulation Resistance Tests, Contact/Pole Resistance Tests, and Testing of Thermal-Magnetic Trip Units (primary injection testing). Special Maintenance Tests should not be done unless a)the circuit breaker has tripped on an unknown fault magnitude or a fault near the interrupting current ratingof the breaker, or b) lack of maintenance, harsh environmental conditions, or similar circumstances place indoubt the ability of the breaker to perform its intended function. Special Maintenance Testing can also bedone to provide a measure of assurance that an aged breaker has not reached its end-of-life (seeIEEE-Std-1458 for recommended testing regarding end-of-life).


No where in this document are the tests that are included in "routine maintenance tests" (11.2.2) and "special maintenance tests" (11.2.3) defined. Since the Annex L gives a recommended frequency of "electrical tests" of 3 to 5 years, some AHJ's have interpreted this to mean that all testing must be done on all breakers to meet the requirements of NFPA 70E, that circuit breakers must be "maintained in accordance with manufacturer's instructions or industry consensus standards" (including this document). The intent of this change is to specify what is meant by "maintained in accordance with...industry consensus standards" with reference to NFPA 70B.




Street Address:

City:

State:

Zip:



16 of 44 1/17/2017 11:22 AM


Public Input No. 47-NFPA 70B-2016 [ Chapter D ]

Annex D Informational References

D.1 Referenced Publications.

The documents or portions thereof listed in this annex are referenced within the informational sections ofthis recommended practice and are not part of the recommendations of this document unless also listed inChapter 2 for other reasons.

D.1.1 NFPA Publications.

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

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

D.1.2 Other Publications.

D.1.2.1 ASTM Publications.

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

ASTM D92, Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester, 2012b .

ASTM D1933, Standard Specification for Nitrogen Gas as an Electrical Insulation Material, 2003 (Rev. ,revised 2008 ) .

D.1.2.2 IEEE Publications.

Institute of Electrical and Electronics Engineers, 445 & 501 Hoes Lane, P.O. Box 1331, Piscataway, NJ08855-1331 Piscataway, NJ 08854-4141 .

ANSI/IEEE 43, Recommended Practice for Testing Insulation Resistance of Rotating Machinery, 20002013 .

IEEE 100, Authoritative Dictionary of IEEE Standards Terms, 2000. (No longer Available)

ANSI/ IEEE 315 (ANSI Y32.2-75) , Graphic Symbols for Electrical and Electronics Diagrams, 1975 (Reaff., reaffiremed 1993 ) .

IEEE 450, Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-AcidBatteries for Stationary Applications, 2010.

IEEE 1106, Recommended Practice for Installation, Maintenance, Testing and Replacement of VentedNickel-Cadmium Batteries for Stationary Applications, 2005, revised 2011 2015 .

IEEE 1188, Recommended Practice for Maintenance, Testing, and Replacement of Valve-RegulatedLead-Acid (VRLA) Batteries for Stationary Applications, 2005 2010 with 2014 amendment .

IEEE C57.12.00, General Requirements for Liquid-Immersed Distribution, Power, and RegulatingTransformers, 2010 2015 .

D.1.2.3 NETA Publications.

InterNational Electrical Testing Association, P.O. Box 687, Morrison, CO 80465 3050 Old Centre Ave.,Suite 102, Portage, MI 49024 .

ANSI/NETA MTS, Standard for Maintenance Testing Specifications for Electrical Power DistributionEquipment and Systems, 2011.


17 of 44 1/17/2017 11:22 AM


D.1.2.4 Other Publications.

ANSI C107.1, Guidelines for Handling and Disposal of Capacitor and Transformer-grade AskarelsContaining Polychlorinated Biphenyls, 1974.(Withdrawn)

IEC 60076-2, Power Transformers – Part 2: Temperature Rise , 1993-04-07 For liquid-immersedtransformers , 3rd edition, 2011 .

Leiter, David, Distributed Energy Resources, U.S. Department of Energy for Fuel Cell Summit IV,Washington, DC, May 10, 2000.

MIL-STD HNDK -339 508 , Wiring and Wiring Devices for Combat and Tactical Vehicles, Selection andInstallation of, December 7, 1987 April 21 , 1998 , available from Defense Automated Printing Service(Customer Service) DLA Document Services , 700 Robbins Avenue, Building 4D, Philadelphia, PA19111-5094. (Supersedes MIL-STD-339)

RAC Publications, Reliability Tool Kit, page 12.

D.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.

D.2.1 IEEE Publications.

Institute of Electrical and Electronics Engineers, 445 & 501 Hoes Lane, P.O. Box 1331, Piscataway, NJ08855-1331 Piscataway, NJ 08854-4141 .

ANSI/IEEE 1100, Recommended Practice for Powering and Grounding Electronic Equipment (IEEEEmerald Book) , 2005.

D.3 References for Extracts in Informational Sections. (Reserved)


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



Public Input No. 46-NFPA 70B-2016[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: Mon May 30 23:52:35 EDT 2016


18 of 44 1/17/2017 11:22 AM


Public Input No. 71-NFPA 70B-2017 [ Section No. D.1.2.1 ]

D.1.2.1 ASTM Publications.

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

ASTM D92, Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester, 2012 2016a .

ASTM D1933, Standard Specification for Nitrogen Gas as an Electrical Insulation Material, 2003 (Rev.2008).


updates


Submitter Full Name: Marcelo Hirschler

Organization: GBH International

Street Address:

City:

State:

Zip:



19 of 44 1/17/2017 11:22 AM


Public Input No. 63-NFPA 70B-2016 [ Section No. K.4 ]


20 of 44 1/17/2017 11:22 AM


K.4 Low-Voltage Equipment.


21 of 44 1/17/2017 11:22 AM


Table K.4(a) through Table K.4(k) address equipment that should be considered items for long-termmaintenance intervals. This includes the following equipment and techniques:

(1) Low-voltage cables and connections

(2) Dry-type transformers

(3) Switchgear

(4) Drawout-type circuit breakers

(5) Buses and bus ducts

(6) Panelboards

(7) Protective relays

(8) Automatic transfer control equipment

(9) Circuit breaker overcurrent trip devices

(10) Fuses

(11) Lighting arresters

Table K.4(a) Low-Voltage Equipment, Low-Voltage Cables and Connections: Maintenance of EquipmentSubject to Long Intervals Between Shutdowns — Electrical Distribution

TypeInspections, Maintenance, and

TestsTypical Frequency and Remarks

Solid Dielectric,Elastomeric, PVC,etc. (Chapter 19)

Inspections (while energized)(19.2.1):

Annually.

Conduit entrances (19.4).Observe for deformation due to pressure andfor bends with radius less than minimumallowed.

Poles and supports. Same as above.

Binder tape terminations (aerialcables) (19.3).

Same as above.

Ends of trays (19.4). Same as above.

Splices (19.2.2). Same as above.

Terminal lugs and connectors (19.2.2,19.2.4).

Observe for evidence of overheating.Infrared survey might be beneficial. Usegood-quality infrared scanning equipment.Conductors should be loaded to at least40 percent capacity while being scanned.

Discoloration or oxidation indicates possibleproblem.

Fireproofing (where required) (19.2.2). Observe for continuity.

Loading.Make certain loads are within cable ampacityrating.

Varnished CambricLead Covered

Inspections (while energized)(19.2.1):

Same as preceding block. Same as preceding block.

Lead sheath (19.2.2).Observe for cracks or cold wipe joints oftenindicated by leakage of cable oil orcompound.

All TypesMajor Maintenance and Testing(deenergized):

3–6 years.

Deenergize (7.1, 19.2.1). Verify thatno parts of the power or controlcircuitry are energized by “backfeed” from alternate power or


22 of 44 1/17/2017 11:22 AM




control sources.

Complete inspection same aspreceding blocks.

Same as preceding blocks.

Clean porcelain of potheads (19.2.4)(15.1.2.1).

Inspect for cracks and chips.

Check general condition of cable.Does insulating material appear to havebeen damaged by overheating?

Observe lugs and connectors foroverheating (15.1.3, 15.2.15, 19.2.4).

Discoloration or oxidation indicates possibleproblem.

Check bolts for tightness.

Test cable insulation withhigh-potential dc (19.5, 11.9.1, 11.9.2,11.9.2.6).

Disconnect cables from equipment. Recordleakage current in microamperes at each testvoltage level.

Record temperature and relative humidity.

As an alternative, test cable insulationresistance (11.9.2.3).

Use 2500-volt or 5000-volt megohmmeter.

Determine condition of cable insulation(11.9.2.6).

Interpret test results, considering length ofcable, number of taps, temperature andrelative humidity.

Reconnect cables to equipment. Tighten connectors adequately.

Aluminum conductors.Make certain that connectors are of theproper type and correctly installed.

Use Belleville washers when boltingaluminum cable lugs to equipment. Advisableto determine conductivity of connection usingmicrohmmeter or to determine voltage dropunder test load conditions.

Table K.4(b) Low-Voltage Equipment, Dry-Type Transformers: Maintenance of Equipment Subject to LongIntervals Between Shutdowns — Electrical Distribution

Type Inspections, Maintenance, and Tests Typical Frequency and Remarks

Ventilated andNonventilated

Inspections (while energized): Monthly.

Operating temperature (21.3.4).Odor of overheated insulation in vicinity ofventilated transformer might be bestindication of problem.

150°C (302°F) is max. operatingtemperature for transformers rated 80°C(176°F) rise.

220°C (428°F) is max. operatingtemperature for transformers rated 150°C(302°F) rise.

Nonventilated enclosure of latter mightnormally be too hot to touch.

Cleanliness of ventilation louvers inenclosure and excessive accumulation ofdust on top of nonventilated enclosure(21.3.5.1 through 21.3.5.6).

Clogged louvers restrict ventilation andthereby increase operating temperature ofcore and coil assembly.

Vacuum louvers without deenergizingtransformer if dust and lint are on outside.

If dust and lint are inside, transformershould always be deenergized andenclosure sides removed to clean louvers,


23 of 44 1/17/2017 11:22 AM



etc.

Clean excessive accumulation of dust offtop of nonventilated enclosure.

Area ventilation and temperature(21.3.5.1).

If ambient temperature exceeds maximumallowed, transformer should be deratedaccordingly.

Loading.Make certain loading is within rating oftransformer.

Major Maintenance (deenergized): 3–6 years, more often if required.

Deenergized (7.1) (21.3.5.4). Verify thatno parts of the power or controlcircuitry are energized by “back feed”from alternate power or controlsources.

Remove enclosure covers and clean ventlouvers (21.3.5.1, 21.3.5.2).

Clean insulators, core, and windings(21.3.5.4, 21.3.5.6).

Use bottle of dry air or nitrogen withpressure regulator, hose, and small nozzleto blow off dust. Restrict pressure to207 kPa (30 psi) max.

Clean with soft-bristle brush as required.

Inspect following components:

Wedges and clamping rings (21.3.5.5).For proper clamping of windings.

Tighten as required.

Primary and secondary buses andconductors (15.1.3, 21.3.5.5).

For tightness of connections and evidenceof excessive heat.

Porcelain insulators (15.1.2). For chips, cracks, and water streaks.

Insulating materials (15.2.11, 15.2.15,21.3.5.5).

For breaks and damage due to excessiveheat.

Windings (15.2.15, 21.3.5.5, 21.3.5.6).For damage to insulation, includingoverheating.

Tap connections (21.3.5.5).For tightness and correctness to provideproper voltage.

Core assembly.

For loose or dislocated laminations,localized or general overheating, andintegrity of ground strap, which is only placewhere core assembly is permitted to begrounded.

Ventilating channels between core andwindings and between windings(21.3.5.6).

For clogging with lint, dust, or tape used tohold spacers, etc., in place during assembly.

Clean as required to allow proper air flow.

Testing (deenergized): 3–6 years. More often if required.

Deenergize (7.1, 21.3.5.4). Verify thatno parts of the power or controlcircuitry are energized by “back feed”from alternate power or controlsources.

Polarization index (PI) test (11.11.2,11.11.3, 11.11.9).

Use 1000-volt megohmmeter.

Low PI results often indicate moisture inwinding. If so, investigate cause andsatisfactorily dry transformer before makinghigh-potential dc test and returning


24 of 44 1/17/2017 11:22 AM



transformer to service.

High-potential dc test (11.11.10, 11.9.2.6).Record leakage currents in microamperes,temperature, and relative humidity.

As an alternative, test transformer with1000-volt, 2500-volt, or 5000-voltmegohmmeter.

Use 1000, 2500, or 5000 volts dc,depending on size and voltage rating oftransformer.

Table K.4(c) Low-Voltage Equipment, Switchgear: Maintenance of Equipment Subject to Long IntervalsBetween Shutdowns — Electrical Distribution


Indoor(Chapter 15)

Inspections (while energized): 3–6 months.

Open doors and inspect components: Detect overheating.

Fronts of circuit breakers.

Protective and control relays (if used)(15.9.7).

Control wiring, not internals.

Auxiliary devices, wiring, and terminalblocks (15.4.6).

Proper indicating lamps should light.

Insulators and insulating materials (15.1.2,15.2.11 through 15.2.15).

Cable connections (15.2.15).

Observe for evidence of overheating.Infrared survey might be beneficial. Usegood-quality infrared scanning equipment.Conductors should be loaded to at least40 percent of capacity while being scanned.

Batteries (if used) (15.9.4).

Also inspect for following conditions:

Loading. Record loads.

Make certain loads are within ampacityratings of breakers and their overcurrent tripcoils.

Cleanliness (15.2.10).Moderate amount of dry nonconductive dustnot harmful.

Dryness (15.2.6, 15.2.7). Evidence of condensation or water leaks.

Rodents and reptiles (15.2.5).

Overheating of parts (15.2.15).

Discoloration or oxidation indicates possibleproblem. Infrared survey might be beneficial.Use good-quality infrared scanningequipment. Components should be loadedto at least 40 percent of capacity while beingscanned.

Make necessary repairs.

Major Maintenance or Overhaul:3–6 years, depending on ambientconditions.

Deenergize (7.1). Verify that no parts ofthe power or control circuitry areenergized by “back feed” from alternatepower or control sources. Completelyclean, inspect, tighten, and adjust allcomponents (15.4.1).

Follow manufacturer's instructions.

Structure and enclosure (15.2.4, 15.2.5). Wire-brush and prime rust spots.

Finish paint.


25 of 44 1/17/2017 11:22 AM



Ventilating louvers (15.2.9). Clean.

Buses, splices, and bolts (15.1.3, 15.2.15).Check bolts for tightness in accordance with8.11.

Insulators and insulating materials (15.1.2,15.2.11 through 15.2.15).

Clean and inspect for cracks.

Circuit breakers (15.4 through 15.6). Refer to circuit breaker section.

Breaker disconnect studs (15.4.3.7).Inspect for pitting and evidence ofoverheating.

Lubricate, unless manufacturer's instructionsspecify that they should not be lubricated.

Breaker disconnect finger clusters(15.4.3.7).

Inspect for proper adjustment and springpressure and overheating.

Inspect retainer rings for stress cracks incorners.

Lubricate, unless manufacturer's instructionsspecify that they should not be lubricated.

Cable connections (15.1.3, 15.2.15, 19.1through 19.4).

Inspect for evidence of overheating. Checkfor tightness.

Use Belleville washers on aluminum lugs.

Drawout breaker racking mechanisms(15.1.7).

Alignment and ease of operation.

Meters (15.9.7). Test for accuracy.

Controls, interlocks, and closing powerrectifiers (15.9.8).

Make functional tests. Check voltages.

CTs, PTs, and control power transformers(15.9.5).

Fuse clips and fuses (18.2).Check clips for adequate spring pressure.Proper fuse rating.

Grounding (15.1.5, 15.9.9).

Components and conditions in above block. Make necessary repairs.

Testing (deenergized) (Chapter 11):

Deenergize (7.1). Verify that no parts ofthe power or control circuitry areenergized by “back feed” from alternatepower or control sources.

3–6 years, depending on ambientconditions.

Test buses, breakers, PTs, CTs, wiring, andcables for insulation resistance (11.9.2.3).

2500-volt dc on buses, breakers, and600-volt equipment.

1000-volt dc on control wiring.

500-volt dc on meters and protective relays.

Calibrate and test protective relays (11.12). Refer to protective relays section.

Functionally trip breakers with relays(11.12.2).

Preferably, inject test current into CT andrelay circuits.

Calibrate and test overcurrent trip devices(15.4.6.4, 15.4.6.5, 11.10).

Use high-current test equipment and adjusttrips to operate in accordance withmanufacturer's and specially preparedtime–current coordination curves. Adjust forproper conformance.

Test conductivity of aluminum cableconnections (15.1.3, 11.10.5.1.5).

Use microhmmeter or determine voltagedrop under test load conditions.

Use Belleville washers when boltingaluminum cable lugs to equipment.


26 of 44 1/17/2017 11:22 AM



Outdoor(Chapter 15)


Same as for indoor gear plus:

Space heaters (15.2.8). Operate during cool weather.

Special emphasis on condensation andwater leaks (15.2.4, 15.2.6, 15.2.7).

Rust spots on underside of roof indicative ofcondensation.

Air filters behind ventilating louvers(15.2.9).

Clean or replace as required.

Major Maintenance or Overhaul:

Deenergize (7.1). Verify that no parts ofthe power or control circuitry areenergized by “back feed” from alternatepower or control sources. Same as forindoor gear (15.4.1).

3 years, more often if conditions require.

Follow manufacturer's maintenanceinstructions.

Testing (deenergized) (Chapter 11): 3 years, more often if conditions require.

Deenergize (7.1). Verify that no parts ofthe power or control circuitry areenergized by “back feed” from alternatepower or control sources. Same as forindoor gear.

Table K.4(d) Low-Voltage Equipment, Drawout-Type Circuit Breakers: Maintenance of Equipment Subjectto Long Intervals Between Shutdowns — Electrical Distribution

TypeInspections,Maintenance, andTests

Typical Frequency and Remarks

Air-Break(15.4)

Inspection andMaintenance(withdrawn fromswitchgear anddeenergized):

Max. of 3 years or at manufacturer's maximum number ofoperations since previous maintenance, whichever occurs first.Immediately after breaker opens to interrupt a serious fault.Follow manufacturer's maintenance instructions. If breaker isstored-energy closing type, follow manufacturer's safetyprecautions, determine that closing springs are discharged ormechanism is blocked to prevent personal injury. Keep handsaway from contacts and mechanism while test-operatingbreaker (15.4.1.1).

Remove arc chutes.Inspect, adjust, and cleanwhere necessary:

Main contacts (15.4.3).For pitting, spring pressure, overheating, alignment, overtravel,or wipe.

Adjust or replace accordingly.

Arcing contacts(15.4.3.2).

For alignment, overtravel, or wipe and for arc erosion.


Moving parts andlinkages (15.4.5.1through 15.4.5.3).

For freedom of movement.

Closing mechanism(15.4.5).

For quick and positive closing action.

Tripping mechanism(15.4.5).

For freedom of movement and reliability to open breakercontacts.


27 of 44 1/17/2017 11:22 AM




Interlocks and safetydevices (15.4.6.2,15.9.8).

Functionally test to prove proper operation.

Primary disconnectfinger clusters (15.4.3.8).

For proper adjustment and spring pressure.

Lubricate, unless manufacturer's instructions specify that theyshould not be lubricated.

Secondary disconnectcontacts (15.4.3.8).

For alignment and spring pressure.

Lubricate.

Closing and trip coils(15.4.6.1).

General condition and evidence of overheating.

Spring charging motorand mechanism (stored-energy type) (15.4.6.1).

Proper operation. Oil leaks from gear motor.

Shunt trip device(15.4.6.1).

For freedom of movement. Functionally test.

Undervoltage tripdevice.


Anti-single-phase orblown fuse lockoutdevices (fused breakersonly).

General condition.

Functionally test with proper voltage to trip and lock outbreaker.

Auxiliary contacts. For proper operation with closing and opening of breaker.

Closing (x and y) relays(electrically operatedbreakers).

Contact erosion.

Dress or replace as required.

Current transformers(15.2.11, 15.9.7.2).

General condition. Check nameplate ratio.

Connection bolts(16.4.1).

Check for tightness.

Structure or frame(16.4.1, 16.4.2, 16.4.3).

For proper alignment and loose or broken parts.

Fuses and mountings(18.1).

General condition and tightness.

Frame grounding device. Connect before and disconnect after primary fingers.

Position indicators(15.4.6.2, 15.9.6.2).

For proper operation.

Auxiliary wiring (15.4.6). General condition and tightness of terminal screws.

Arc chutes (15.4.4).For broken parts, missing arc splitters, and amount of metalspatter and burning on interior surfaces.

Snuffer screens should be clean.

Repair or replace as necessary.

Operation counter (if soequipped).


Record number of operations.

Insulators and insulatingmaterials (15.2.11,15.2.15).

For cracks, breaks, and overheating.


28 of 44 1/17/2017 11:22 AM




Breaker auxiliary devices(15.4.6).


Testing (withdrawnfrom switchgear anddeenergized) (7.1, 11.5through 11.8):

Max. of 3 years, etc., same as preceding block.

Test insulation resistance(11.9.1 through 11.9.2.4).

2500-volt megohmmeter on each main contact with breakeropen and all other main contacts and frame grounded.

1000-volt megohmmeter on auxiliary devices and controls andassociated wiring, except solid-state trip devices.

Contact conductivity orresistance (11.10.5.1.5).

Use microhmmeter or determine voltage drop under test loadconditions.

Overcurrent (OC) tripdevices(electromechanical,series type) (15.4.6.4).

Pass specified currents from high-current test set through coilsof series type OC trip devices.

Trip devices should open breaker contacts within time limitsaccording to manufacturer's or specially designed time–currentcoordination curves.

Adjust trip devices as required to accomplish desired results.

Test set should be equipped with cycle counter for accuracy ofshort-time and instantaneous trip tests.

Record results.

Overcurrent trip devices(electromechanical, 5amp CT type).

Test 5 amp, type OC trip devices in similar manner usingreduced current proportional to ratio of CTs in switchgear thatnormally supply current to the OC trip coils.

Record results.

Overcurrent trip devices(solid-state type)(15.4.6.5).

Use manufacturer's instructions and test set specificallydesigned for solid-state trip device being tested, or use primaryinjection from high-current test set.

Adjust trip device settings to obtain desired tripping times andcurrents to conform with applicable coordination curves.

Record results.

Do not use megohmmeter insulation resistance tester onsolid-state trip devices or associated wiring.

System Testing(breaker installed):

Electrically operatedbreaker

After preceding maintenance and testing have beensatisfactorily completed, install electrically operated breaker inproper switchgear cell and rack it into “Test” position.

Operate closing control devices to ensure that breaker closesand latches without trip-free operations.

Operate trip control devices to ensure that breaker trips open ina reliable manner (8.4.6.3).

Functionally test all electrical interlock and safety devices.

After satisfactorily passing all operational tests, the breaker canbe racked into the “Connected” position and placed in normalservice.


29 of 44 1/17/2017 11:22 AM




Oil-Immersed

Inspection andMaintenance(withdrawn fromswitchgear anddeenergized):

Max. of 3 years or at manufacturer's maximum number ofoperations since last previous maintenance, whichever occursfirst.

Immediately after breaker opens to interrupt a fault.

Follow manufacturer's maintenance instructions.

Lower oil tank. Inspect,adjust, and clean wherenecessary:

Main contacts.For pitting, spring pressure, overheating, alignment, overtravel,or wipe.


Arcing contacts. For alignment, overtravel, or wipe and for arc erosion.


Moving parts. For freedom of movement.

Closing mechanism. For quick and positive closing action.

Tripping mechanism.For freedom of movement and reliability to open breakercontacts.

Mechanical interlocks. Functionally test to prove proper operation.

Primary disconnectfinger clusters.

For proper adjustment and spring pressure.

Lubricate, unless manufacturer's instructions specify that theyshould not be lubricated.

Secondary (control)disconnect contacts.

For alignment and spring pressure.

Lubricate.

Closing and trip coils. General condition and evidence of overheating.

Shunt trip device. For freedom of movement. Functionally test.

Undervoltage tripdevice.


Bushings. Cracked and chipped porcelain.

Condition of surfaces.

Auxiliary contacts. For proper operation with closing and opening of breaker.

Closing (x and y)relays (electricallyoperated breakers).

Contact erosion. Dress or replace as required.

Current transformers. General condition. Check nameplate ratio.

Connection bolts. Check for tightness.

Structure or frame. For proper alignment and loose or broken parts.

Fuses and mountings. General condition and tightness.

Frame groundingdevice.

Connect before and disconnect after primary fingers.

Position indicators. For proper operation.

Auxiliary wiring. General condition and tightness of terminal screws.

Arc quenchers.For broken and missing parts and amount of metal spatter andburning on interior surfaces.

Repair or replace as necessary.


30 of 44 1/17/2017 11:22 AM




Operation counter (ifso equipped).


Record number of operations.

Insulators andinsulating materials.

For cracks, breaks, and chips.


Testing (withdrawnfrom switchgear anddeenergized):

Max. of 3 years, etc., same as preceding block.

Insulation.2500-volt megohmmeter on each main contact with breakeropen and all other main contacts and frame grounded.

1000-volt megohmmeter on auxiliary devices and controls andassociated wiring.

Contact conductivity.Use microhmmeter or determine voltage drop under test loadconditions.

Overcurrent trip devices(electromechanical type).

Pass specified currents from current test set through coils of tripdevices to open breaker contacts within time limits according tomanufacturer's or specially designed time–current coordinationcurves.

Adjust trip devices as required to accomplish desired results.

Test set should be equipped with cycle counter for accuracy ofinstantaneous trip tests.

Record results.

System Testing(breaker installed):Electrically operatedbreaker.

After above maintenance has been satisfactorily completed,connect electrically operated breaker to switchgear or teststand control wiring by means of the test cord and plug.

Operate closing control devices to ensure that breaker closesand latches without trip-free operations.

Operate trip control devices to ensure that breaker trips open ina reliable manner.

Functionally test all electrical interlock and safety devices.

After satisfactorily passing all operational tests, the breaker canbe placed in its switchgear cell, racked into the “Connected”position, and placed in normal service.

Table K.4(e) Low-Voltage Equipment, Buses and Bus Ducts: Maintenance of Equipment Subject to LongIntervals Between Shutdowns — Electrical Distribution


Indoor Inspections (while energized): 3–6 months.

Open buses:

Condition of bus conductors (15.1.3).

Evidence of overheated joints (15.1.3).

Discoloration or oxidation indicates possible problem.Infrared survey can be beneficial. Use good-qualityinfrared scanning equipment. Buses should beloaded to at least 40 percent of capacity while beingscanned.

Condition of insulators (15.1.2.1). Cleanliness and breaks.

Clearance from grounded metalsurfaces and above floor.

Loading. Make certain load is within ampacity rating.


31 of 44 1/17/2017 11:22 AM



Bus duct (covers in place):

Condition of enclosure (15.2.4, 20.4.3).

Evidence of water drips on enclosure.

Security of switches attached to plug-intype bus duct.

Adequate grounding (15.1.5, 15.9.9).


Maintenance and Tests (deenergized): 3–6 years.

Deenergize (7.1). Verify that no parts ofthe power or control circuitry areenergized by “back feed” fromalternate power or control sources.

Open buses:

Check connection bolts for tightness(15.1.3).

Torque in accordance with 8.11.

Clean insulators and inspect (15.1.2). Check for cracks, chips, and breaks.

Test insulation resistance (11.9.2.3).2500-volt megohmmeter, if suitable. If not, 1000-voltmegohmmeter is satisfactory.

Bus duct (covers removed):

Check condition of bus conductors(15.1.3).

Check for evidence of overheated joints(15.1.3, 15.2.15).

Discoloration or oxidation indicates possible problem.



Check switches attached to plug-intype bus duct (15.1.5, 15.9.9).

For condition of contacts, operating mechanism, fuseclips, fuses, and load cables. Make necessaryrepairs.

Check ground connections (20.4.3). For tightness.

Check condition of enclosure. Close all unused holes.

Check for proper ventilation (15.2.9). All ventilating louvers should be open.

Check for evidence of internal moisture(15.2.7).

From water leaks or condensation.

Clean and inspect insulators (15.1.2). Check for cracks, chips, and breaks.

Test insulation resistance (11.9.2.3).Manufacturer usually permits 1000-volt dc test for1 minute.

Outdoor Inspections (while energized): 3–6 months.

Open buses:

Same as for indoor open buses.

Bus duct (covers in place):

Condition of enclosure (15.2.4). Enclosure should be weatherproof type.

Adequate grounding (15.1.5, 15.9.9).


Maintenance and Testing(deenergized):

3–6 years.

Deenergize (7.1). Verify that no parts ofthe power or control circuitry areenergized by “back feed” fromalternate power or control sources.


32 of 44 1/17/2017 11:22 AM



Open buses:

Same as for indoor open buses.

Bus duct (covers removed):

Check condition of bus conductors(15.1.3).

Check for evidence of overheated joints(15.1.3, 15.2.15).

Discoloration or oxidation indicates possible problem.



Check ground connections (15.1.5,15.9.9).

For tightness.

Check condition of enclosure (15.2.4,20.4.3).

Close all unused holes. Wire-brush and prime rustspots.

Finish paint.

Check for evidence of internal moisture(15.2.7).

From water leaks or condensation. Correct.

Clean and inspect insulators (15.1.2). For cracks, chips, and breaks.

Test insulation resistance (11.9.2.3).Manufacturer usually permits 1000-volt dc test for1 minute.

Check operation of space heaters(15.2.8).

Operate during cool weather.

Check enclosure ventilating louvers(15.2.9)

All ventilating louvers should be open. Shouldexclude insects, rodents, reptiles, and metal rods.

Table K.4(f) Low-Voltage Equipment, Panelboards: Maintenance of Equipment Subject to Long IntervalsBetween Shutdowns — Electrical Distribution



Fused SwitchType


Switches for overheating(16.5.4).

Feel front of each switch to detect overheating.Arrangements should be made to shut down anyoverheated switch to determine cause and repair orreplace.

Portion of enclosure over supplycable terminals for overheating(16.4.1, 16.4.2).

Feel enclosure. If overheated, remove cover andinspect supply cables and terminals for evidence ofoverheating. Discoloration or oxidation indicatespossible problem.

Loading.Constant load on switch should not exceed80 percent of switch nameplate rating, unless switchis rated for 100 percent continuous operation.

Enclosure for general condition(16.3).

Arrange to have unused conduit knockout holesplugged with knockout closures.

Ground connections (15.1.5). For integrity.

Directory. For accuracy of loads served.

Evidence of water dripping on orstriking NEMA 1 enclosure.

Stop water leaks.

Cleaning, Inspection, andMaintenance (deenergized)(7.1, 16.5.2):

3–6 years.

Clean interior of enclosure andswitches (16.3).


33 of 44 1/17/2017 11:22 AM




Inspect fuses for overheating(11.7, 18.1).

Refer to low-voltage fuse section.

Inspect fuseclips for overheatingand weakness (18.1.2).

Replace weak or burned clips.

Inspect fuses for proper ampererating for cable size and forinterrupting adequacy for faultcurrent capability of supplysystem (18.1.4).

Fuse ampere rating should not exceed NEC ampacityof cables. Fuse interrupting rating should exceed faultcurrent available from system.

Check connection bolts fortightness (15.2.15).

Do not overtighten and strip threads.

Check set screws in all cableconnectors for tightness (15.1.3).

AL/CU set screw-type connectors tend to loosen. Setscrews in many old-style AL/CU connectors areunplated aluminum on which threads tend to gall andcause set screws to bind before they tightensufficiently against cables. Replace this connector, ifnecessary.

Open and close switches. Inspectcontact surfaces and operatingmechanism (16.5.5).

Repair or replace burned contacts. Make certainswitch contacts close fully.

Inspect all insulating materials(15.2.11, 15.2.15).

For cracks, breaks, cleanliness, and thermal damage.

Inspect arc chutes. For broken parts and missing arc splitters.

Check door/switch mechanicalinterlocks (16.11.2).

That switch door cannot be opened when switchhandle is in “On” position, unless interlock defeatermechanism is operated.

That switch handle cannot be thrown to “On” positionwhile switch door is open, unless interlock defeatmechanism is operated.

Check padlock devices(16.11.2.2).

That switch handle cannot be thrown to “On” positionwith padlock in lockout device.

Check door latches.That doors do not open when operating handle is in“On” position.

Check directory for accuracy.

Enclosure (16.3). Wire-brush and prime rust spots. Finish paint.

Test supply cables, switches, andload cables for insulationresistance (11.9.2.3).

2500-volt megohmmeter preferred, 1000-voltmegohmmeter acceptable.

Molded-CaseCircuit-BreakerType

(Chapter 17, 11.10)

Inspections and maintenance similar to fused switch type except:

3–6 years.

Chapter 5 Circuit breakers usually cannot beopened for inspection andmaintenance.

See Annex L for non-invasive maintenance frequencyrecommendations.

Breakers usually operate at ahigher temp.

Cleaning and inspection of the breaker externally ona 3–6 years basis, depending on environment, age,condition, duty cycle, and reliability requirements.

Breakers usually contain no fuses.


34 of 44 1/17/2017 11:22 AM


Breakers often not equipped withexternal door or operating handleother than handle integral withbreaker.

Section11.2.3,11.10.1

Breaker overcurrent trip operation

can

(special maintenacetests) can be tested withhigh-current test set(11.10).

Special maintenance testing (inverse-time and instanteneous primary injectiontesting, individual pole resistance [millivolt drop] and rated in-hold testing)should be done only as required due to interruption of unknown or high currentfaults, suspected damage or failure, or end-of-life considerations.

Table K.4(g) Low-Voltage Equipment, Protective Relays: Maintenance of Equipment Subject to LongIntervals Between Shutdowns — Electrical Distribution


Induction Disk(11.12)

Same as for medium-voltage protectiverelays.

Refer to medium-voltage protective relayssections.

Table K.4(h) Low-Voltage Equipment, Automatic Transfer Control Equipment: Maintenance of EquipmentSubject to Long Intervals Between Shutdowns — Electrical Distribution


Indoor andOutdoor

Same as for medium-voltage auto transfercontrol equipment.

Refer to medium-voltage auto transferequipment section.

Table K.4(i) Low-Voltage Equipment, Circuit Breaker Overcurrent Trip Devices: Maintenance of EquipmentSubject to Long Intervals Between Shutdowns — Electrical Distribution

Type Inspections, Maintenance, and TestsTypical Frequency and

Remarks

Series and 5 Amp Type(11.10.6.3)

Same as OC trip item in low-voltagedrawout circuit breaker section.

Refer to low-voltage drawoutcircuit breaker section.

Table K.4(j) Low-Voltage Equipment, Fuses: Maintenance of Equipment Subject to Long Intervals BetweenShutdowns — Electrical Distribution



Cartridge-and-Plug Type(18.1)

Same as for medium-voltage fusesexcept:

Refer to medium-voltage fuse section.

Inspect for discoloration or charringof fiber barrel ends adjacent toferrules (15.2.15).

This can be done while fuses are energized.Indicates probability of loose contact betweenfuse ferrules or blades and spring clips.

Check for assembly rightness ofrenewable fuse ferrules on barrels(15.1.3, 18.1.2).

Looseness can possibly cause overheating offerrules and fiber barrel ends.

Check for constant moderateoverload on circuit supplied by fuses.

Fuses should not be continuously loaded beyond80 percent of ampere rating.

Table K.4(k) Low-Voltage Equipment, Lightning Arresters: Maintenance of Equipment Subject to LongIntervals Between Shutdowns — Electrical Distribution



Indoor and OutdoorType (15.9.2)

Same as for medium-voltagelightning arresters except:

Refer to medium-voltage lightning arrestersection. Use 500-volt megohmmeter.


35 of 44 1/17/2017 11:22 AM




Test insulation resistance. Arrestersin metal containers.

Inspect conductors for damage where theyenter container.

Additional Proposed Changes

File Name Description Approved

Annex_K_suggested_changes.pdfThe format of your website makes determining what the changes are difficult. This is what it should perhaps look like.


Stating a 3-6 year interval without stating what maintenance is being done is confusing and misleading. This Annex duplicates Annex L, but also conflicts with it; this change resolves that. 3 years is much too long for cycling or thermography, it is about right for cleaning and inspection, and is much too frequent for Special Maintenance Tests (as defined in the related 11.2.3 change suggestion). Those tests require removal of the breaker from the equipment (IEEE 1458, section 8) or at least connection of wires with proper torque (NEMA AB-4, section 2.2.4) and are not recommended by manufacturers or any of the consensus standards to be done on a routine basis (with a possible exception of IEEE Std 3007.2-2010, which goes so far as to say "The most thorough test for all three types of circuit breakers is by primary injection testing," but does not have any recommended frequency, and never indicates that it should be "routine."




Street Address:

City:

State:

Zip:



36 of 44 1/17/2017 11:22 AM


Molded Case Circuit Breakers

Inspections and maintenance similar to fused switch type except:

See Annex L for non-invasive maintenance frequency recommendations.

Chapter 5 Circuit breakers usually cannot be opened for inspection and maintenance.

Cleaning and inspection of the breaker externally on a 3-6 year basis, depending on environment, age, condition, duty cycle, and reliability requirements

Breakers operate at a higher temperature

Breakers usually contain no fuses

Breakers often are not equipped with external door or operating handles other than the handle integral to the breaker.

Section 11.2.3, 11.10.1

Breaker overcurrent trip operation (special maintenance tests) can be tested with a high current test set.(11.10)

Special maintenance testing (inverse-time and instantaneous primary injection trip tests, individual pole resistance [millivolt drop] tests, and rated in-hold testing) should be done only as required due to interruption of high or unknown current faults, suspected damage, or end-of-life considerations.

�1

Annex K suggested changes


Public Input No. 64-NFPA 70B-2016 [ Section No. L.1 ]


37 of 44 1/17/2017 11:22 AM


L.1 Introduction.


38 of 44 1/17/2017 11:22 AM


This annex provides, in Table L.1, an initial guideline for maintenance intervals for equipment. It should bestressed that environmental or operating conditions of a specific installation should be considered andmight dictate a different frequency of maintenance than suggested in this annex (see 8.2.4). Chapter 12and Annex K deal specifically with the maintenance of equipment that, by nature of its application,necessitates long intervals between shutdowns. It should be noted that maintenance, inspection, and testmethods for equipment that can operate for long periods are essentially the same as for equipment thatmight be shut down frequently. However, the recommended work should be performed with more care anddiligence to obtain the desired reliability for service to loads that can operate continuously for months oryears.

Table L.1 Interval Guidelines

Item/Equipment Task/Function Interval Reference

Substations (Outdoor) Infrared scanning Annually 11.17

Insulators Visual inspection 4–6 months 15.1.2.1

Corona detection 4–6 months 15.1.2.2

Electrical testsAs indicated byother PM

11.9

Conductors Visual inspection of connections 4–6 months 15.1.3

Check connections for tightnessAs indicated byother PM

15.1.3

Air-disconnecting switches Visual inspection 4–6 months 15.1.4.2

Operation check Annually 15.1.4.3

Contact inspection Annually 15.1.4.3

Grounding equipment Visual inspection Annually 15.1.5

Check connections for tightness 1–2 years 15.1.5

Electrical test 3 years11.13.1, 11.13.2,

11.13.3

Enclosures Security/operational check 1–3 months 15.1.6

Switchgear Assemblies Infrared scanning Annually 11.17

Enclosures Security/operational check 15.2.5

Outdoor 1–3 months

Indoor 6 months

Visual inspection15.2.6 through

15.2.7.2


Indoor 6 months

Ventilation Visual inspection 1–3 months 15.2.9

Space heaters Operational check Annually 15.2.8

Insulation Visual inspection/clean Annually15.2.11 through

15.2.15.3

Electrical tests 2 years 11.9

Air Circuit Breakers, Medium Voltage

Insulation Visual inspection/clean Annually 15.4.2

Electrical tests 3 years 11.9

Contacts Visual inspection/clean Annually 15.4.3.5

Adjust Annually 15.4.3.6

Electrical test 3 years11.16.1.2.2,

11.16.1.2.7, 11.9.3.2

Arc interrupters Visual inspection/clean Annually 15.4.4.3, 15.4.4.4


39 of 44 1/17/2017 11:22 AM



Electrical test 3 years 15.4.4.4

Air-puffer operational check Annually 15.4.4.5

Operating mechanism Visual inspection Annually 15.4.5.2

Operational check/adjustment Annually 15.4.5.2

Trip device circuit Operational check Annually 15.4.6.3

Air Circuit Breakers, LowVoltage

Visual inspection/clean/adjust

Electrical tests

Annually

3 years15.4, 11.9, 11.10.6

Vacuum Circuit Breaker Visual inspection/clean/adjust Annually 15.4

Contact checks/vacuum integrity 3 years 15.5.1, 15.5.2

Electrical tests 3 years 11.9, 11.10.6

Oil Circuit Breaker General inspections and tests 3 years 11.9, 11.16.4.2.5

Bushings Visual inspection/clean 3 years 15.6.2.1

Oil Dielectric breakdown test level Annually 15.6.2.3, 11.9

Annually 15.6.6

Contacts Resistance check 3 years 15.6.3

Visual inspection 3 years 15.6.3

Interrupter SwitchesSee Air Circuit Breakers, MediumVoltage

15.7

Surge Arresters Visual inspection 15.9.2.1


Indoor Annually

Electrical test 3–6 years 15.9.2.2

Capacitors Visual inspection 3–6 months 15.8.3.4

Fuse check 3–6 months 15.8.3.3

Stationary Batteries andChargers

Visual inspection/clean Monthly15.9.4.4 through

15.9.4.4.13

Torque intercell connectors Annually 15.9.4.4.11

Pilot cell measurements Monthly 11.14.2.2

All lead–acid cell-specific gravity Quarterly 11.14.2.1

Capacity test 1–5 years 11.14.2.3

Sample connection resistances Quarterly 11.14.2.4

Infrared scanning Annually 11.14.2.5, 11.17

Protective RelaysCleaning, calibration, and functiontests

15.9.7.3, 11.12

Electromechanical 1–2 years

Solid state 3 years

Supervisory Control and Data Acquisition (SCADA)

Electrical/electronic Systems

Lamp test/verify indicators Monthly12.14.11.1,12.14.11.2

Inspect enclosures for dirt, heat,water

Monthly 8.7.1, Table L.1

Physically exercise valves andactuators

6 months(Reserved for

future)

Actuate switches 6 months(Reserved for

future)

Run PLC diagnostics 6 months 22.4.4


40 of 44 1/17/2017 11:22 AM



Calibrate sensors and transmitters Annually 11.7

Calibrate actuators Annually 11.7

Calibrate meters Annually

Test batteries 6 months 15.9.4.6

Test automatic control sequences Annually(Reserved for

future)

Verify alarms Annually15.9.6.1, 12.4.11,

15.9.6

Pneumaticsystem/components

Check regulators and filters Monthly(Reserved for

future)

Inspect tubing and piping Monthly(Reserved for

future)

Actuate pressure switches 6 months(Reserved for

future)

Physically exercise valves andactuators

6 months(Reserved for

future)

Calibrate switches and sensors Annually(Reserved for

future)

Calibrate pressure gauges Annually(Reserved for

future)

Calibrate thermometers Annually(Reserved for

future)

Power and DistributionTransformers

Liquid filled Current and voltage readings Weekly–monthly 21.2.2.2, 21.2.3

Temperature readings Weekly–monthly 21.2.4

Liquid level check Weekly–monthly 21.2.5.1

Pressure/vacuum gauge readings Weekly–monthly 21.2.5.2

Liquid analysis Annually 21.2.8

Comprehensive liquid tests Annually 11.11.9, 11.19

Insulation test 3–5 years 21.2.9, 11.9

Turns-ratio test 3–5 years 21.2.9, 11.11.2

Fault gas analysis Annually 21.2.9, 11.11.9

Dissolved-gas-in-oil analysis Annually 11.11.10

Dry type Cleaning, inspection, and testing 2 years 11.9, 11.11.2

Power Cables Visual inspection Yearly 19.2

Electrical testing 1–3 years 19.5, 11.9.2.4

Motor Control Equipment Infrared scanning Annually 11.17

Enclosures Visual inspection/clean Annually16.2.1 through

16.3.5

Bus bar, wiring, and terminalconnections

Check connections for tightness inaccordance with 8.11

2 years 16.4.2

Visual inspection of insulators Annually 16.4.4

Visual inspection of wiring Annually 16.4.5

Electrical tests 2 years 11.9.2.3

Disconnects Visual inspection/clean Annually 16.5.3

Operation check Annually 16.5.5


41 of 44 1/17/2017 11:22 AM



Contactors Visual inspection/clean Annually16.8.2.1 through

16.8.3

Motor overload relays,

nonthermal typeCheck connections for tightness 2 years 16.9.4

Cleaning, calibration, and functiontests

3 years 16.9.1.3, 16.9.2

Electrical interlocks Inspection Annually 16.11.1.2

Mechanical interlocks Inspection Annually 16.11.2

Electronic Equipment Inspection Annually 22.4.1

Cleaning 3 years 22.4.2

Adjustments/calibration 3–5 years 22.4.3

Molded-Case CircuitBreakers

Visual inspection

Mechanical cycling /

clean

test

3

1-2 years 17.

7 through 17.

11

Mechanical test

Thermography (dead front on) 1- 2 years 11. 17

.11 Electrical test 3–5

Thermography (dead front off)

Clean and Inspect3-6 years 11.

10.

17

Chapter 5

Fuses, 1000 Volts or Less

Fuse terminals and fuseclips Visual inspection 3 years 18.1.2

Clip contact pressure 3 years 18.1.3

Cleaning of contact surfaces 3 years 18.1.3

FusesVisual inspection fordiscoloration and damage

3 years 18.1.3

Fuses, Over 1000 Volts

Insulators Visual inspection/cleaning 3 years 18.2.3.1

Fuse terminals and fuseclipsInspection of contactsurfaces

3 years 18.2.3.2

FusesVisual inspection forcorrosion

3 years 18.2.3.2

Terminal connections andhardware

3 years 18.2.3.3

Fuse tubes 3 years 18.2.3.3

Fuses, Vented Expulsion Type Visual inspection of seals 3 years 18.2.3.4


42 of 44 1/17/2017 11:22 AM


Rotating Equipment Vibration analysisContinuously to6-month intervals

26.7

Stator and rotor windingsVisual and mechanicalinspection, cleaning

Annually8.7, 25.3,

25.6

Electrical testing Annually 11.20

Brushes, collector rings, andcommutators

Visual and mechanicalinspection

Annually 25.4

Bearings, sleevedOil level check

Drain, flush, and lubricate

Weekly–monthly

Annually25.5

Waste-packed Re-oil, check air gap 1000 hours 25.5.2.3

Ball and roller Inspection and lubrication Per manufacturer 25.5.3

Kingsbury thrust bearings Drain, flush, and lubricate Per manufacturer 25.5.4

Wiring Devices

Attachment plugs, cord connectorbodies

InspectionMonthly and whenused

24.2.1through

24.6

Receptacles InspectionMonthly and whenused

24.3.1

Operation checkMonthly and whenused

24.3.2

General-use snap switches Operation check When used24.5.2

through24.5.4

Pin-and-sleeve devices, heavy-dutyindustrial-type plugs, cord connectors,and receptacles

Inspections, cleaning, andchecks

Monthly and whenused

24.8

Portable Electric Tools Inspections/cleaningMonthly and whenused

29.1.3,29.3.1,29.3.2

Lubrication Per manufacturer 29.3.3

Electrical tests Quarterly 29.7

Low-Voltage Busway Infrared scanning Annually 20.4.2.1

Visual inspection Annually 20.4.3.2

Electrical test 2 years 20.4.8

Uninterruptible Power SupplySystems

Infrared scanning Annually11.17,20.3.8

Visual inspection Quarterly 28.3.8

Routine maintenance 6 months 28.3.8

System tests 2 years 28.5

Battery testsSee StationaryBatteries andChargers.

15.9.4

UPS support standby generator Test run, exercise Monthly 28.3.5

Additional Proposed Changes

File Name Description Approved

Annex_L_suggested_changes.pdfThe table form on your website may not be readable. This pdf is what I intended to suggest.



43 of 44 1/17/2017 11:22 AM


This Annex is for routine maintenance. It has a too long periodicity for cycling (recommended annually by manufacturers Square D, GE, Eaton, Seimens), and is attributed to the separation and hardening of the lubricant used in MCCBs, and the need to stir it up. Two years may work; we see increased failures at three. Thermography was omitted, it should be done regularly (I think annually, but that's just one opinion). Thermography with the panel cover off would be nice, recognizing that it is difficult to accomplish in many places because of arc flash potentials, but then this part is a guide. Clean and inspect is a routine maintenance, whether it should be here or in Annex K is debatable. "Electrical tests" are generally thought of as the Special Maintenance Testing of 11.2.3, and should not be "routine" at all, much less on a 3-6 year basis, but reserved for when the MCCB has interrupted a high or unknown current fault, suspicion of failure or damage exists, or end-of-life needs to be extended. They have been moved to Annex K.




Street Address:

City:

State:

Zip:



44 of 44 1/17/2017 11:22 AM


For Annex L

Molded-Case Circuit Breakers

Mechanical cycling/test 1-2 years 17.10

Thermography (dead front on) 1-2 years 11.17

Thermography (dead front off)Clean and inspect

3-6 years 11.17 Chapter 5

�1NFPA 70B First Draft Meeting Teleconference February 22 - 23, 2017 Page 55 of 55

Documents

FIRST DRAFT MEETING AGENDA · 2017-02-14 · FIRST DRAFT MEETING AGENDA NFPA Technical Committee on Electrical Equipment Maintenance (EEM-AAA) First Draft Meeting for 2019 Edition