30 C.F.R. § 75.519 Main power circuits; disconnecting switches.
Title 30 - Mineral Resources
[Statutory Provision] In all main power circuits, disconnecting switches shall be installed underground within 500 feet of the bottoms of shafts and boreholes through which main power circuits enter the underground area of the mine and within 500 feet of all other places where main power circuits enter the underground area of the mine.
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart F—Electrical Equipment—General
§ 75.519 Main power circuits; disconnecting switches.
