Construction Training

Construction Training

Electrical Safety and Lockout/Tagout

Regulatory DriversRegulatory Drivers2

10 CFR § 851.23 Safety and health standards

(a) Contractors must comply with the following safety and health standards that are applicable to the hazards at their covered workplace:

(3) 29 CFR 1910, Occupational Safety and Health Standards

(13) NFPA 70, National Electrical Code

(14) NFPA 70E, Electrical Safety in the Workplace

For implementation at SLAC see ESH Manual:Chapter 8: Electrical SafetyChapter 51: Control of Hazardous Energy

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Electrical Safe Work Practices at SLAC1. Work on near exposed energized electrical circuits or components:

a) Test, measurement, and inspection of exposed energized parts that does not require any physical change to the equipment is allowed with an approved work plan and JSA. Safe work practices and PPE per NFPA 70E apply.

b) Any physical alteration of electrical equipment (making or tightening connections, removing or replacing components, etc.) is not allowed. Physical alteration may be made only if electrical equipment is electrically safe.

Note: “on or near” means within the Limited Approach Boundary or Flash Protection Boundary (whichever is greater) of exposed parts

2. Deenergized parts that have not been locked out and verified deenergized by test (ZVV) in accordance with a lockout procedure shall be treated as energized.

Note: Only individuals that participate in the lockout in accordance with these procedures are protected from hazardous energy. Workers not participating in the lockout shall treat deenergized equipment as energized.

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3. The electrician in charge of the work is responsible for controlling access at the Limited Approach Boundary or the Flash Protection Boundary, whichever is greater. Workers not participating on the lockout shall remain outside the boundary.

Exception: Workers not on the lockout (e.g. an inspector) may be escorted inside the boundary if they are under the continuous observation of a qualified electrical worker. In no case can the escorted worker cross the Restricted Approach Boundary.4. All 120VAC construction loads (hand tools

and other) shall be GFCI protected.

5. All tools must be of the grounding type.

6. Visually inspect cords, plugs, and tools before use.

7. Test GFCIs before use.

8. No homemade extension cords.

9. Do not “daisy-chain” extension cords.

10.Protect cords from damage.11.Only SLAC Qualified Electrical Workers may operate breakers or

perform switching

Electrical Safe Work Practices at SLAC

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12.Temporary power shall be installed per NEC Article 590. Installation plans for temporary trailers, including temporary power hookup, require BIO review. Physical work requires BIO inspection prior to energization.

13.Do not obstruct the Working Space of any electrical equipment.

13.Install Arc Flash Hazard labels prior to connecting new electrical equipment to its power supply.

14.After connection to its power supply, access to electrical equipment shall be controlled under the lockout/tagout program.

15.Any questions regarding electrical safety or approved safe work practices should be brought to the attention of the SLAC FCM, SLAC Field Safety professional, or SLAC Electrical Safety Officer.

Electrical Safe Work Practices at SLAC

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Lockout/Tagout at SLAC

Use of a plug LOTO device enhances safety

CORD AND PLUG EXEMPTIONWork on cord and plug-connected equipment, where ALL hazards are controlled by unplugging. The plug or cord must be positively controlled (worker has exclusive control).

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All 8 conditions

must be true to use the General Lockout

Procedure

GENERAL LOTO PROCEDURE

1. No potential for stored or residual energy.

2. Single energy source.

3. Energy source can be isolated and locked

out.

4. Equipment is effectively isolated from the

energy source when locked out.

5. Isolation of single energy source will

completely deenergize and deactivate the

system.

6. Lockout device under exclusive control of the

worker(s)

7. Work will not create hazards for other

employees

8. Equipment has never been involved in an

accident under the General LOTO Procedure

Lockout/Tagout at SLAC

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NFPA 70E 120.2(D)(3)Complex Lockout

…where one or more of the following exist:

(1) Multiple energy sources

(2) Multiple crews

(3) Multiple crafts

(4) Multiple locations

(5) Multiple employers

(6) Multiple disconnecting means

(7) Particular sequences are required to safely establish the

lockout

(8) A job or task that continues for more than one work

period

Complex Lockout at SLAC: 1) Equipment-specific Lockout Procedure (ELP) or 2) Group Lockout Procedure

COMPLEX LOCKOUT PROCEDURES

Lockout/Tagout at SLAC

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“Master” lock on group lockbox signifies LOTO energy isolation is complete!

Group Lockout Basics

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Lockout/Tagout Key Points

1. SLAC makes the system/equipment safe for the subcontractor. SLAC Authorized Worker locks first, subcontractor locks after.

2. If SLAC worker will not perform work under the lockout, the worker replaces red lockout/tagout lock and tag with admin lock and tag.

3. Each worker (SLAC and subcontractor) working under the lockout shall affix their own personal lock and tag.

4. SLAC lockout locks shall be red; subcontractor lockout locks shall be “uniquely identifiable.” Admin locks shall be any color but red.

5. All lockout tags, SLAC and subcontractor, shall be red, white, and black danger tags with “Do Not Operate” or “My Life is on the Line” or similar wording to identify the hazard

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6. Lockouts are either simple or complex:

a) Simple lockout. Use the General Lockout Procedureb) Complex lockout. Use:

i. Equipment-specific Lockout Procedure (ELP), orii. Group Lockout Procedure

7. Complex lockouts require a SLAC Lead Authorized Worker who:

a) Coordinates the lockout including multiple work groups or work scopes

b) Provides Continuity of Protection for all persons working under the lockout (is the first to lock on and the last to lock off)

c) Verifies each individual worker has affixed a lock and tag

Lockout/Tagout Key Points

Contact the ESO for assistance with Complex Lockout

ELECTRICAL SAFETY AND LOCKOUT/TAGOUT AT SLAC

QUESTIONS?

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