ELECTRICAL SAFETY

ENERGIZED SYSTEMS

Electrical work is performed on energized systems over 50 volts ONLY if

management has demonstrated that de-energizing introduces additional or

increased hazards or is infeasible due to equipment design or operational limits.

Reference 29 CFR 1910.333(a) (1).

Approval for working on or near energized parts:

Signature of immediate supervisor or foreman

Signature of person in charge of the facility

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HAZARD

Injury and/or incapacitation Class Voltage 00 500 V 01 , 000 V 1 7.5 kV 2 17 kV 3 26.5 kV 4 36 kV

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HAZARD ELIMINATION

A - Backup and the 100% rule are required for electrical systems over 300 volts.

For electrical systems 300 volts or less, the need for backup is determined by the

qualified person performing the job. Backup must have the safety training and

PPE as the worker performing the work. Backup has no other duties, other than

protecting the person performing the work from the hazards associated with

electrical shock.

B - Voltages involved are identified, including close proximity circuits. Electrical

work is performed using the personal protective equipment listed below:

1) Less than 300 volts line to line: minimum requirement is to conduct a

hazards evaluation and use electrically insulated tools, PPE, and shields or

barriers, as appropriate.

2) 300 volts to ground and less than 600 volts line to line: minimum PPE: eye

and face protection, gloves rated for the voltage, and an electrically rated

insulated mat when practical.

3) 600 volts to ground and less than 13.8 kV line to line: minimum PPE: eye

and face protection, gloves rated for the voltage an electrically insulated

mat and sleeves, when practical. It is recommended that when working

with voltages above 600 volts, two sources of protection are used (such as

hot stick and gloves, hot stick and bucket truck, or blanket and gloves.

NOTE:

To be used risk criteria to determine the ALARP

Risk potential – Qualitative assessment technique