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30 C.F.R. § 75.706   Deenergized underground power circuits; idle days—idle shifts.

Title 30 - Mineral Resources

Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart H—Grounding

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§ 75.706   Deenergized underground power circuits; idle days—idle shifts.

[Statutory Provisions]

When not in use, power circuits underground shall be deenergized on idle days and idle shifts, except that rectifiers and transformers may remain energized.

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