Electrical Safety & Lockout/Tagout Flashcards

When an energy control procedure must be used on equipment that cannot be locked out, what additional requirement does OSHA impose on tagout programs?

Answer: Tags must provide a level of safety equivalent to a lockout program

OSHA 1910.147 requires that when tagout is used instead of lockout, the employer demonstrate that an equivalent level of safety is achieved.

Which OSHA standard governs electrical safety for general industry employers (not construction)?

Answer: 29 CFR 1910 Subpart S

29 CFR 1910 Subpart S covers electrical safety standards for general industry workplaces in the United States.

What is the correct action when an employee discovers that a piece of equipment is energized unexpectedly during a maintenance task?

Answer: Stop work immediately and implement LOTO before proceeding

Discovering unexpected energy requires an immediate work stoppage and implementation of proper lockout/tagout before any further work is performed.

Which organization publishes the National Electrical Code (NEC) that governs electrical wiring installations in the US?

Answer: NFPA

The National Fire Protection Association (NFPA) publishes NFPA 70, commonly known as the National Electrical Code, which governs electrical installations.

What is the primary purpose of ground fault circuit interrupters (GFCIs) in workplace electrical systems?

Answer: To protect workers from electric shock by detecting current leakage to ground

GFCIs detect small current imbalances indicating leakage to ground and trip the circuit within milliseconds to prevent fatal electric shock.

A safety official reviewing a contractor's LOTO program finds that affected employees were not notified before equipment was de-energized. This is a violation of which requirement?

Answer: Notification requirement under 29 CFR 1910.147(d)(2)

29 CFR 1910.147(d)(2) requires that affected employees be notified before lockout or tagout devices are applied and before they are removed.