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Electrical Workplace Safety NFPA 70E 2012 Significant Changes Lee Hale NFPA 70E Committee Member Partner e-Hazard.com

Electrical Safety Presentation [NFPA 70E]

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Page 1: Electrical Safety Presentation [NFPA 70E]

Electrical Electrical W o r k p l a c e S a f e t y

NFPA 70E 2012 Significant Changes

Lee Hale

NFPA 70E Committee Member Partner e-Hazard.com

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2012 Changes Disclaimer

This document and the opinions in this document are not the opinion of NFPA or the NFPA 70E committee. The information in this document is based on the ballot and the opinions of those attending the meeting and developing the seminar. They are intended for use by companies in developing best practices for electrical safety compliance and may or may not reflect the minimum requirements of NFPA 70E 2012.

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2012 Changes By the Numbers

Annually, U.S. averages 4,000 non-disabling electrical contact injuries

Annually, U.S. averages 3,600 disabling electrical contact injuries

Every day 1 person is electrocuted in the workplace

Electrocutions are 4th leading cause of traumatic occupational fatalities

Each year +2,000 workers are sent to burn centers with electrical burns

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2012 Changes

250

300

350

400

450

500

550

600

650

700

1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Fata

litie

s US Fatalities with Potential Arc Component

Statistics from BLS website. Analysis by Hugh Hoagland ArcWear.com. To see calculations, visit www.arcwear.com/stats.mht.

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2012 Changes

300,000 At-Risk Behaviors

30,000 Near Misses

300 Recordable Injuries

30 Lost-time Injuries

1 Fatality

Overall Safety

10 Recordable Injuries

1 Fatality

Electrical Safety

1 to 300 1 to 10

Importance of Electrical Safety

So could it just take 10,000 electrical at-risk behaviors to lead to a fatality?

Page 6: Electrical Safety Presentation [NFPA 70E]

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2012 Changes Arc-in-a-Box

Arc-in-a-box energy can be two to twelve times greater when the arc is an arc in a box situation.

Watch the disconnect door

Page 7: Electrical Safety Presentation [NFPA 70E]

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2012 Changes Common Ways to Interact with Equipment

• Opening or closing doors or removing a cover.

• Operating switches or circuit breakers.

• Racking a circuit breaker. • Using tools or test equipment.

Misunderstood concept

An arc flash hazard is a state that occurs when exposed parts are present OR when you are interacting with a piece of equipment in such a way that you could cause an arc flash.

Page 8: Electrical Safety Presentation [NFPA 70E]

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2012 Changes Arc Blast Data

40 – 50kA can: • Produce a 25

psi pressure wave which can throw a person several feet.

• Create a 165 dB sound wave.

20 kA, 10 cycle <6 cal/cm² Watch disconnect door & mannequin

Page 9: Electrical Safety Presentation [NFPA 70E]

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2012 Changes 100. Arc Flash Boundary

Related terms used throughout the document such as: • “flash protection boundary” • “flash hazard boundary,” • “flash boundary” • shall be modified to the new term “arc flash

boundary.” • Boundary, Arc Flash • Boundary, Limited, Restricted, Prohibited

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2012 Changes Arc Rating – Total Document

Arc rating will be added across the document to further identify that FR doesn’t always mean the clothing was tested to the correct ASTM test for Arc Rating. MOST flame resistant (FR) garments are arc rated but some “claim” to be FR but meet no related standards. This will eliminate these from use.

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2012 Changes 130.7(C)(10)(b) Arc Flash Protective Equipment – Head Protection

An Arc rated balaclava shall be used with an arc rated face shield when the back of the head is within the arc flash boundary. An arc rated hood shall be used the incident energy exceeds 12 cal/cm2.

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2012 Changes 130.7(C)(16) Personal Clothing and Personal Protective Equipment

HRC 2* and HRC 2 are combined HRC 2 will require an arc rated face shield and Balaclava or Arc rated flash suit hood. HRC 1 requires arc rated face shield & safety glasses

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2012 Changes 100. Working On

Working On (energized electrical conductors or circuit parts). Intentionally coming in contact with energized electrical conductors or circuit parts. Clarifies the difference between Diagnostic testing and repair.

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2012 Changes 100. Working On

Addresses conflicting statements and articles with testing, trouble shooting, electrically safe work condition and electrical work permit and inadvertent contact Diagnostic Testing is still OK Intentionally coming in contact (repair) requires an electrical work permit.

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2012 Changes 130.2(B)(1) Energized Electrical Work Permit

When Required. When intentionally working on exposed energized conductors or circuit parts within the limited approach boundary.

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2012 Changes

Exposed (as applied to energized conductors, parts or equipment).

Misunderstood concept

If you can “inadvertently touch” a part, you MUST be protected from it.

84

Exposed to Electrical Hazards

Page 17: Electrical Safety Presentation [NFPA 70E]

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2012 Changes 110.1(C) Documentation

There shall be a documented meeting between the host employer and the contract employer.

Page 18: Electrical Safety Presentation [NFPA 70E]

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2012 Changes Types of Training

•Classroom, and/or •On-the-job (OJT)

• Demonstrated proficiency. • Name & dates training

conducted • Maintained for duration of

employment

NFPA 70E 110.2 (D)

Documentation Required

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2012 Changes 110.2.C Emergency Procedures

Employees exposed to shock hazards and those employees responsible for taking action in case of emergency shall be trained… … in methods of release … first aid, CPR and in automatic external defibrillator (AED) use. … shall be certified by the employer annually.

Page 20: Electrical Safety Presentation [NFPA 70E]

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2012 Changes Helping Someone Getting Shocked

• Turn off energy source,

if possible.

• Dislodge the person from the energy source by using a non-conductive item such as a broom or board.

• Push them away.

DO NOT touch the person. You will only become a second victim.

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2012 Changes 110.2(D)(1)(f) Employee Training

The employer shall determine, through regular supervision or through inspections conducted on at least an annual basis that each employee is complying with the safety-related work practices required by this standard.

Supervisory Work Practice Inspection

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2012 Changes 110.2(D)(3)(3) Retraining

Retraining shall be performed at intervals not to exceed 3 years. 110.2(E) Training Documentation The documentation shall contain the content of the training, each employee’s...

Page 23: Electrical Safety Presentation [NFPA 70E]

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2012 Changes 110.3.(E) Electrical Safety Program

Procedures. An electrical safety program shall identify the procedures for working: • within the Limited Approach Boundary

(LAB) and • for working within the arc flash

boundary (AFB) • before work is started. Goal of separation of LAB and AFB makes work clearer.

Page 24: Electrical Safety Presentation [NFPA 70E]

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2012 Changes 110.3.(G) Job Briefings

Additional job briefings shall be held if changes that might affect the safety of employees occur during the course of the work.

Toolbox Talk

Page 25: Electrical Safety Presentation [NFPA 70E]

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2012 Changes Record Keeping

• Training required min. every 3 years NFPA 70E 110.2(D). • Document that employees demonstrated skill proficiency

NFPA 70E 110.2(E).

• Dielectric test records of HV live-line tools OSHA 1910.269(j), rubber gear OSHA 1910.137(b), and insulated mobile equipment OSHA 1910.68(e)(3) .

• Some incident records required OSHA 300 Log.

• Annual supervisory safe work practice inspections NFPA 70E 110.2(D)(1)(f)

• Documented electrical safety program audit (not more than every 3 yrs.) & annual field audit. NFPA 70 E 110.4 (H)

Page 26: Electrical Safety Presentation [NFPA 70E]

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2012 Changes 110.4 Testing

Only qualified persons shall perform tasks such as testing, troubleshooting, voltage measuring, etc. within the LAB of energized electrical conductors or circuit parts operating at 50 volts or more or where an electrical hazard exists.

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2012 Changes Work Involving Electrical Hazards 130.1 General

All requirements of this article shall apply whether an incident energy analysis is completed or if Table 130.7(C)(15)(a), Table 130.7(C)(15)(b) and Table 130.7(C)(16) are utilized in lieu of an incident energy analysis in accordance with 130.5 exception

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2012 Changes

What is the one thing you know when you pull a disconnect down?

You moved the handle.

Lockout/Tagout

Page 29: Electrical Safety Presentation [NFPA 70E]

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2012 Changes

Blades open

Exposed to Electrical Hazards Safety-Related Work Practices

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2012 Changes ONE Hand Rule

• Wear proper PPE level.

• Stand out of the “line-of-fire.”

• Turn head away. • Take a deep breath & hold it.

• DO NOT reach across door.

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2012 Changes 130.3.A.1 2009 edition Arc Flash Protection Boundary

The 4 foot boundary based on 100 Ka cycles has been DELETED! NEW AC and DC Tables will contain the fault current, clearing time and the prospective arc flash boundary's for the tasks! FINALLY!

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2012 Changes 130.4(D) Approach by Unqualified Persons.

Unless permitted by 130.4(D)(2), no unqualified person shall be permitted to approach nearer than the Limited Approach Boundary of energized conductors and circuit parts.

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2012 Changes 130.5 Arc Flash Hazard Analysis

• 5 year review of facility Arc Flash Hazard Analysis still required

• Any changes to system require updating

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2012 Changes Table 130.5 Arc Flash Hazard Analysis

Informational Note No. 5: See IEEE 1584 for more information regarding arc flash hazards for three-phase systems rated less than 240 volts.

Page 35: Electrical Safety Presentation [NFPA 70E]

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2012 Changes Required Labels

• Nominal System Voltage • Arc Flash boundary And one of the following: • Incident energy & working

distance • Min. Arc Rating of Clothing • Required PPE Level • Highest HRC for the Equipment Best Practice can include: • Equipment name/ID • Upstream device

NFPA 70E 130.5 (C)

Method of calculating and support data for labels shall be documented

Min 8 cal/cm² PPE 5.4 cal/cm²

5 feet

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2012 Changes What Equipment Must be Labeled?

IF… “electrical equipment… is likely to require examination, adjustment, servicing or maintenance while energized, [it] shall be field marked with a label…” 130.5 (C)

• Switchboards • Panelboards • Industrial Control

Panels • Meter Socket

enclosures • Motor Control

Centers

Page 37: Electrical Safety Presentation [NFPA 70E]

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2012 Changes

NFPA 70E 130.5 (C)

Old Arc Flash Hazard Labels

“The labels below are acceptable if applied prior to September 30, 2011.”

Page 38: Electrical Safety Presentation [NFPA 70E]

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2012 Changes 130.6(H) Housekeeping duties

20

Housekeeping Duties. Employees shall not perform housekeeping duties inside the Limited Approach Boundary where there is a possibility of contact with energized electrical conductors or circuit parts, unless adequate safeguards (such as insulating equipment or barriers) are provided to prevent contact.

Page 39: Electrical Safety Presentation [NFPA 70E]

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2012 Changes 130.7(A) Personal and Other Protective Equipment

Informational Note #2 It is the collective experience of the TC that normal operation of enclosed electrical equipment operating at 600 volts or less, properly installed and maintained by qualified persons is not likely to expose and employee to an electrical hazard.

Page 40: Electrical Safety Presentation [NFPA 70E]

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2012 Changes 130.7(C) Personal Protective Equipment

When an employee is working within the Restricted Approach Boundary, the worker shall wear personal protective equipment in accordance with 130.4 sections.

Prohibited

Restricted

Limited

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2012 Changes 130.7(C)(10)(1) Heavy Duty leather gloves

“Heavy duty” leather gloves NEW DEFINITION throughout the standard min thickness 0.7mm. • Acceptable as Arc

Flash protection to 10 cal/cm²

• Rubber gloves with leather protectors for > 10 cal/cm²

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2012 Changes 130.7(C)(10)(e) Foot Protection

Heavy duty leather work shoes shall be used in all exposures > 4 cal/cm2 • EH (Electrical Hazard)

shoes meeting ASTM F2413 can provide a secondary source of electric shock protection under dry conditions.

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2012 Changes 130.7(C)(15)(a) AC tables NEW FORMAT

The category headers will contain the following: • Available fault current & Clearing times • Working distances • Prospective Arc Flash Hazard boundary

distances

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2012 Changes 130.7.C.9 2009 edition

600 volt class MCC’s will be broken up into sections to reflect the different available fault currents, clearing times and prospective arc flash hazard boundary’s.

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2012 Changes 130.7(C)(15)(b) DC tables - NEW

The category headers will contain the following: • Available fault current & Clearing time • Working distances • Prospective Arc Flash Hazard boundary distances • Tasks, Hazard/Risk Category's, Rubber insulating gloves

and Insulated tools will look like the AC tables.

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2012 Changes Annex F Update on Risk Assessment

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2012 Changes DC Arc Flash Calc Annex D

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2012 Changes

Questions

Lee Hale [email protected] E-Hazard.com or ArcWear.com E-Hazard.com Monthly Newsletter