It is dawn at the truck tailgate. The crew gathers for the tailboard, runs through the job, and gets to work pulling a failed transformer. An hour in, the sky darkens and a thunderstorm rolls in fast, and the protective grounds are already off the line for the next phase of work. A first-day apprentice notices the grounds came off before anyone confirmed the line was dead. Before you read on, decide two things: what should the morning briefing have covered, and who in that crew is allowed to call a stop.
Every job on or near energized lines starts with a tailboard, the pre-job briefing. Under 1910.269 it is not a casual chat. The briefing must cover five elements: the hazards, the work procedures involved, special precautions, energy-source controls, and the PPE requirements. Labor cost and crew seniority are not on that list and never will be. The briefing exists to put every hazard on the table before the first tool comes off the truck.
The second half of the answer is the part new crew members get wrong. Stop-work authority is not rank-based. Anyone on the crew, including a first-day apprentice, can and must stop the job the moment they see an unsafe condition. The apprentice who spotted the grounds situation does not wait for the foreman to notice. They call the stop, and the work halts.
That storm is also why one briefing is rarely enough. A second pre-job briefing is required when the job or working conditions change, and weather moving in is a textbook change. The crew re-briefs, restores protective grounds, reassesses the new hazard, and only then decides whether the work continues. Complex or high-hazard jobs may warrant repeated briefings as the work moves through its stages.
Treat the tailboard as the contract the whole crew signs onto, not a box to check. The five elements force the hazards into daylight, and stop-work authority gives the newest person on site the same power as the foreman to keep everyone alive when conditions turn.
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