Lockout/Tagout on a Temporary Construction Site
Electricians are terminating feeders into a new 480-volt panel that is fed from an existing energized switchgear room. To de-energize, the crew's plan is for one journeyman to flip the breaker in the switchgear room and "stand watch" while the apprentices work in the panel 200 feet away. The breaker has no lockout device and the switchgear room is unlocked. The journeyman says, "I'll just yell if anything happens." One apprentice is alone at the panel with a screwdriver while the journeyman is in the other room. The crew has no lockout/tagout procedure for this task, no locks, and no tags on the truck. The general contractor's electrical safety program requires an energized work permit for any work on or near energized parts.
1. Is the "stand watch" approach an acceptable substitute for lockout/tagout here? Explain what the construction electrical standard requires.
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No. The construction electrical standard (29 CFR 1926 Subpart K) requires that circuits and equipment be de-energized and locked out before work, and that a lockout/tagout procedure be used. A person "standing watch" is not a lockout device and is not a recognized substitute. The journeyman is 200 feet away and cannot see the panel; if someone re-energizes the breaker, the apprentices have no protection and no warning. The switchgear room being unlocked means anyone could close the breaker. The correct approach: identify the disconnecting means, open it, apply a lock and tag (each worker who could be exposed applies their own lock), verify de-energization with a tester, and release stored energy. If the crew genuinely cannot de-energize, then energized work requires a documented hazard analysis, a qualified person, appropriate PPE, and an energized work permit - which the GC's program already requires and which the crew does not have.
2. What is wrong with the apprentice's situation, and what should the supervisor do before any work resumes?
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The apprentice is working alone on or near energized equipment with a screwdriver - a serious exposure with no second person to de-energize, call for help, or perform rescue. The crew has no locks, tags, or written procedure, so the lockout/tagout program is not being implemented. Before work resumes: stop the work; have a qualified person de-energize and lock out the feeder at the switchgear; apply locks and tags; verify with a tester; ensure no one works alone on or near energized parts; and confirm the crew has a written procedure and training. If energized work is truly unavoidable, obtain the GC's energized work permit, complete a hazard analysis, and provide the required PPE and a qualified attendant. The supervisor should also confirm the switchgear room is secured so the breaker cannot be operated by others.