2012 70E New Requirements - 2011 IAEI Western Section Mtg

7/22/2019 2012 70E New Requirements - 2011 IAEI Western Section Mtg

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2011 Underwriters Laboratories Inc.

NFPA 70E Electrical Safety

in the WorkplaceChanges for 2012

Dave Dini, P.E.

Underwriters LaboratoriesChair NFPA 70E Technical Committee on

Electrical Safety in the Workplace

[email protected]

REV: 9/20/2011


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IEEE / NFPA

Arc Flash CollaborativeResearch Project

IAEI Western Section Meeting

Louisville, KentuckySeptember 21, 2011


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Acknowledgements

3

Paul Dobrowsky

Innovative Technology Solutions

Jeff SargentMichael Fontaine

Dr. Wei-jen Lee


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Technical Committee Meetings forthe 2012 Edition of NFPA 70E

4

ROP Meeting February 2010, Memphis, TN540 Public Proposals

8 Committee Proposals

ROC Meeting October 2010, Savannah, GA433 Public Comments

11 Committee Comments


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2012 NFPA 70ETechnical Committee Membership

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25 Principal Members19 Alternate Members

Over 12 Days of MeetingsOver 4000 Man-Hours of Work!!

Effective August 31, 2011


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ARTICLE 90Introduction

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90.1 Purpose. The purpose of this

Standard is to provide a practical safeworking area for employees relative tothe hazards arising from the use of

electricity.

90.1 Practical Safeguarding. The purpose of this

Codeis the practical safeguarding of persons andproperty from the hazards arising from the use ofelectricity.


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ARTICLE 90Introduction

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90.2 Scope(A) Covered. This standard addresses electricalsafety related work practices for employeeworkplaces that are necessary for the practicalsafeguarding of employees relative to the hazardsassociated with electrical energy during activitiessuch as the installation, inspection, operation,

maintenance, and demolition of electric conductors,electric equipment, signaling and communicationsconductors and equipment, and raceways.


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ARTICLE 90Standard Arrangement

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ARTICLE 110General Requirements for

Safety-Related Work Practices

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Relationships with Contractors

Training Requirements

Electrical Safety Program

Use of Equipment


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110.1 Relationships with Contractors

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New

(C) Documentation. There shall be adocumented meeting between the hostemployer and the contract employer.


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Electrically Safe Work Condition

Electrial conductors and equipment shall beconsidered energized until the source ofenergy is removed.

Open disconnecting device(s) for each source

Apply lockout / tagout devices properly

Test each phase conductor (L-L and L-G) to verifythey are de-energized


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Test Before Touch!

1 Verify operation of the test instrumentbefore testing

2 Perform test to verify the absence ofvoltage

3- Verify operation of the test instrumentafter testing


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Can I Work Energized?

1 Less than 50 Volts

2 Demonstrate that de-energizing

introduces additional hazards or increasedrisks

3 - Demonstrate that de-energizing isinfeasible due to equipment design oroperational limits


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Except for testing, troubleshooting, voltagemeasurement, or visual inspection, an EnergizedElectrical Work Permit is required for energized work.


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15

Who approves energized work?


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What about the normal operation of

equipment?

Normal operation of enclosed equipment,operating at 600 Volts or less, is not likely toexpose an employee to an electrical hazard,provided it has been properly installed andmaintained.


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110.2 Training Requirements

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(C) including cardiopulmonary resuscitation andAutomatic External Defibrillator (AED) use shall be ...


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110.2 Training Requirements

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(C) including cardiopulmonary resuscitation andAutomatic External Defibrillator (AED) use shall be ...

New -(D)(1)(f) The employer shall determine,through regular supervision or through inspectionsconducted on at least an annual basis that eachemployee is complying with the safety-related workpractices required by this standard.

(E) The documentation shall contain the content ofthe training, each employees name and dates oftraining.


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ARTICLE 120Establishing an Electrically Safe

Work Condition

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Process of Achieving Safe Work Conditions

Lockout / Tagout

Temporary Protective Grounding


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120.2 Lockout/Tagout Devices

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(C)(2) Form of Control. Three Two forms ofhazardous electrical energy control shall be

permitted: individual employee control, simplelockout/tagout, and complex lockout/tagout. Forthe individual employee control and the simplelockout/tagout, the qualified person shall be incharge. For the complex lockout/tagout, the personin charge shall have overall responsibility.Informational Note: For an example of a

lockout/tagout procedure, see Annex G.

(D)(1) Deletes Individual Qualified EmployeeControl Procedure


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ARTICLE 130Work Involving Electrical Hazards

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Electrically Safe Work Conditions

Approach Boundaries

Arc Flash Hazard Analysis

Other Precautions / PPE


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DC Shock Boundaries andDC Hazard/Risk Categories

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Existing Table 130.2(C) becomes Table

130.4(C)(a), for AC systems. New Table130.4(C)(b) for the approach boundariesassociated with DC system voltages.

Existing Table 130.7(C)(9) becomes Table130.7(C)(15)(a), for AC systems. New Table130.7(C)(15)(b) for DC Hazard/Risk categories.

Adds a new Annex D.10: DC Incident EnergyCalculations.


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DC Shock Boundaries and

DC Hazard/Risk Categories

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130.3 (2009) Exception 1

Arc Flash Hazard Analysis

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Deletes the exception

An arc flash hazard analysis shall not be required where all of the followingconditions exist:

(1) The circuit is rated 240 volts or less.(2) The circuit is supplied by one transformer.(3) The transformer supplying the circuit is rated less than 125 kVA.

and adds an Informational Note:

Informational Note: An arc flash hazard analysis may

not be necessary for some three-phase systems ratedless than 240 volts. See IEEE 1584 for moreinformation. (Sec. 130.5 for 2012)


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130.5(B) Protective Clothing

and Other PPE

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(1) Incident Energy Analysis

130.5(B)(1) FPN: For information on estimating theincident energy, see Annex D. For information onselection of arc-rated clothing and other personal

protective equipment (PPE), see Table H.3(b) inAnnex H.

(2) Hazard / Risk Categories


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130.5(B) Protective Clothing

and Other PPE

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(1) Incident Energy Analysis


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(2) Hazard / Risk Categories


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130.5(C) Equipment Labeling

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(C) Equipment Labeling. Electrical equipment such asswitchboards, panelboards, industrial control panels, meter

socket enclosures and motor control centers that are likely torequire examination, adjustment, servicing or maintenance whileenergized shall be field marked with a label containing all thefollowing information:

(1) At least one of the following:a. Available incident energy and the correspondingworking distanceb. Minimum arc rating of clothingc. Required level of PPEd. Highest Hazard/Risk Category (HRC) for theequipment

(2) Nominal system voltage(3) Arc Flash Boundary


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130.5(C) Equipment Labeling

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(1) At least one of the following:a. Available incident energy and the corresponding working distanceb. Minimum arc rating of clothingc. Required level of PPE

d. Highest Hazard/Risk Category (HRC) for the equipment(2) Nominal system voltage(3) Arc Flash Boundary


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130.7(C)(5) Hearing Protection

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(new) Employees shall wear hearing protectionwhenever working within the arc flash boundary.


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130.7(C)(10) Arc Flash

Protective Equipment

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(b) Head Protection:

(1) An arc-rated balaclava shall be used with anarc-rated faceshield when the back of the headis within the arc flash boundary. An arc-ratedhood shall be permitted to be used instead of

an arc-rated face shield and balaclava.(2) An arc-rated hood shall be used when

the anticipated incident energyexposure exceeds 12 cal/cm2.


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130.7(C)(10) Arc Flash

Protective Equipment

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(c) Face Protection:

Face shields with a wrap-around guarding toprotect the face, chin, forehead, ears, and neckarea shall be used.


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Table 130.7(C)(15) Hazard/Risk

Category Classifications

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Moves the maximum short circuit current, faultclearing time from the Specific Notes 1 to 4 into theappropriate section(s) of Table 130.7(C)(15)(a).

Adds the Arc Flash Protection Boundaries to Table130.7(C)(15)(a) and (b).


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Table 130.7(C)(15) Hazard/Risk

Category Classifications

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Table 130.7(C)(16)

Protective Clothing and PPE

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Includes the requirement for a balaclava in

hazard/risk category 2.

Deletes hazard/risk category 2* and note 10.

Revises all tasks currently listed as hazard/riskcategory 2* in Table 130.7(C)10 to hazard/riskcategory 2.


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Table 130.7(C)(16)


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Electrical Safety Statistics

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According to the Department of Labors

Bureau of Labor StatisticsAbout 8,000 electrical contact injuries arereferred to emergency rooms each year in U.S.

Over 2,000 workers are sent to burn centerseach year with electrical-related burn injuries.

Electrical workplace injuries cause about onefatality every day.


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Arc Flash Research

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Arc flash accidents cause

Injuries

Fatalities


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NFPA 70E

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IEEE 1584

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Table 130.7(C)(16)


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Table 130.7(C)(16)


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Table 130.7(C)(16)


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Project Sponsors

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Project Organizational Structure


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Project Organizational Structure

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Steering Committee

Mr. Ben Johnson, Co-ChairMr. Jim Beyreis, Co-Chair

Ms. Sue Vogel, IEEEMr. Mark Earley, NFPA

Research Manager

Dr. Tammy Gammon, P.E.

Project Manager

Dr. Wei-jen Lee, P.E.

Technical Advisory Committee (TAC)

- Project Manager- Research Manager- Platinum Members Representatives- Invited Experts


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HRC #1 PPE - Arc-Rated Long

Sleeve Shirt and Pants - 4 cal/cm2

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/


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ASTM 1959/F

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T bl 130 7(C)(16)


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Table 130.7(C)(16)


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T bl 130 7(C)(16)


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Table 130.7(C)(16)


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C l i t R h


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Calorimeter Research

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To verify existing or generate new test

protocols used to measure the thermaleffects of an arc fault event. Thesemay include calorimeter comparisons,

the alternate placement ofcalorimeters, radiometer research, lowfault currents, and plasma cloud

issues.

C l i t R h


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Calorimetry The science of measuring theheat of chemical reactions or physical

changes.

Multiplying the temperaturechange by the mass andspecific heat capacities of thesubstances gives a value for

the energy given off orabsorbed during the reaction.



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trigger wire



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Table 130 7(C)(16)


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Table 130.7(C)(16)


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trigger wire

Non-Thermal Effects


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Non-Thermal Effects

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trigger wire

Another goal of this work is to define othermechanisms of energy transfer from thearc to the surrounding area and theirrelationship to potential injury. These may

include measurements of blast andpressure, shrapnel, sound, and toxic by-products.

Another goal of this work is to define other

mechanisms of energy transfer from the arcto the surrounding area and their relationshipto potential injury. These may include

measurements of blast and pressure,shrapnel, sound, and toxic by-products.

Blast Pressure


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Blast Pressure

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Sound Pressure


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Sound Pressure

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Phase II (2011 2012)


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Phase II (2011 2012)

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Voltage Ibf (kA) Gap Width (in)

480V 10, 40, 65, 100, 150 0.5, 1.25, 2.5

600V 5, 20, 40, 65, 100, 150 0.5, 1.5, 2.5, 42.4kV 5, 20, 40, 65 0.5, 4, 6, 8, 12

4.16kV 5, 20, 40, 65 0.5, 4, 6, 8, 12

13.8kV 5, 20, 40, 65 0.5, 4, 8, 12, 24

Perform Light Intensity and Spectrum Measurements

Shrapnel Damage

Toxicity


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Electrical Safety Statistics

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According to the Department of LaborsBureau of Labor Statistics

About 8,000 electrical contact injuries arereferred to emergency rooms each year in U.S.

Over 2,000 workers are sent to burn centerseach year with electrical-related burn injuries.

Electrical workplace injuries cause about onefatality every day.


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WORK SAFE!

THANK YOU

Documents

2012 70E New Requirements - 2011 IAEI Western Section Mtg