A required safety procedure that physically locks equipment off so it cannot be turned on while workers are servicing it.
Lockout/tagout (LOTO) is an energy control procedure that requires de-energizing, isolating, and physically locking out all hazardous energy sources (electrical, pneumatic, hydraulic, thermal, gravity) before performing maintenance or servicing on equipment. OSHA 29 CFR 1910.147 mandates LOTO programs with written procedures, authorized employee training, periodic inspections, and personal padlocks for each worker.
Before the electrician entered the panel to replace circuit breakers, all power was locked out with a personal padlock and the work was verified with a voltage tester.
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