30 CFR § 77.500 Mandatory Safety Standards, Surface Coal Mines and Surface Work Areas of Underground Coal Mines

§ 77.500 Electric power circuits and electric equipment; deenergization.

Current through Jul 27, 2026 · Read all of Part 77

Power circuits and electric equipment shall be deenergized before work is done on such circuits and equipment, except when necessary for troubleshooting or testing.

← § 77.413 Boilers.§ 77.501 Electric distribution circuits and equipment; repair. →