30 CFR 77.700 : Mineral Resources (§ 1.1 To Parts 1291-1299) — (§ 1.1 To Parts 105-199) — Mine Safety And Health Administration, Department Of Labor (§ 1.1 To Parts 105-199) — Coal Mine Safety And Health (§ 70.1 To § 90.301) — Mandatory Safety Standards, Surface Coal Mines And Surface Work Areas Of Underground Coal Mines (§ 77.1 To Subpart U) — Grounding (§ 77.700 To § 77.705) — Grounding metallic sheaths, armors, and conduits enclosing power conductors.
4 Aug 2016
Metallic sheaths, armors, and conduits enclosing power conductors shall be electrically continuous throughout and shall be grounded by methods approved by an authorized representative of the Secretary.