Electrical Equipment—General | MidpageElectrical Equipment—General
75.500Permissible electric equipment.75.500-1Other low horsepower electric face equipment.75.501Permissible electric face equipment; coal seams above water table.75.501-1Coal seams above the water table.75.501-2Permissible electric face equipment.75.501-3New openings; mines above water table and never classed gassy.75.502Permits for noncompliance.75.503Permissible electric face equipment; maintenance.75.503-1Statement listing all electric face equipment.75.504Permissibility of new, replacement, used, reconditioned, additional, and rebuilt electric face equipment.75.505Mines classed gassy; use and maintenance of permissible electric face equipment.75.506Electric face equipment; requirements for permissibility.75.506-1Electric face equipment; permissible condition; maintenance requirements.75.507Power connection points.75.507-1Electric equipment other than power-connection points; outby the last open crosscut; return air; permissibility requirements.75.508Map of electrical system.75.508-1Mine tracks.75.508-2Changes in electric system map; recording.75.509Electric power circuit and electric equipment; deenergization.75.510Energized trolley wires; repair.75.510-1Repair of energized trolley wires; training.75.511Low-, medium-, or high-voltage distribution circuits and equipment; repair.75.511-1Qualified person.75.512Electric equipment; examination, testing and maintenance.75.512-1Qualified person.75.512-2Frequency of examinations.75.513Electric conductor; capacity and insulation.75.513-1Electric conductor; size.75.514Electrical connections or splices; suitability.75.515Cable fittings; suitability.75.516Power wires; support.75.516-1Installed insulators.75.516-2Communication wires and cables; installation; insulation; support.75.517Power wires and cables; insulation and protection.75.517-1Power wires and cables; insulation and protection.75.517-2Plans for insulation of existing bare power wires and cables.75.518Electric equipment and circuits; overload and short circuit protection.75.518-1Electric equipment and circuits; overload and short circuit protection; minimum requirements.75.518-2Incandescent lamps, overload and short circuit protection.75.519Main power circuits; disconnecting switches.75.519-1Main power circuits; disconnecting switches; locations.75.520Electric equipment; switches.75.521Lightning arresters; ungrounded and exposed power conductors and telephone wires.75.522Lighting devices.75.522-1Incandescent and fluorescent lamps.75.523Electric face equipment; deenergization.75.523-1Deenergization of self-propelled electric face equipment installation requirements.75.523-2Deenergization of self-propelled electric face equipment; performance requirements.75.523-3Automatic emergency-parking brakes.75.524Electric face equipment; electric equipment used in return air outby the last open crosscut; maximum level of alternating or direct electric current between frames of equipment.Appendix A to Subpart F of Part 75List of Permissible Electric Face Equipment Approved by the Bureau of Mines Prior to May 23, 1936