Title 30
Mineral Resources
5,954 sections · 206 parts · 6 chapterseCFR snapshot through 2026-08-19
Part 75
MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
101–200 of 486 sections
- § 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.
- § 75.600Trailing cables; flame resistance.
- § 75.600-1Approved cables; flame resistance.
- § 75.601Short circuit protection of trailing cables.
- § 75.601-1Short circuit protection; ratings and settings of circuit breakers.
- § 75.601-2Short circuit protection; use of fuses; approval by the Secretary.
- § 75.601-3Short circuit protection; dual element fuses; current ratings; maximum values.
- § 75.602Trailing cable junctions.
- § 75.603Temporary splice of trailing cable.
- § 75.604Permanent splicing of trailing cables.
- § 75.605Clamping of trailing cables to equipment.
- § 75.606Protection of trailing cables.
- § 75.607Breaking trailing cable and power cable connections.
- § 75.700Grounding metallic sheaths, armors, and conduits enclosing power conductors.
- § 75.700-1Approved methods of grounding.
- § 75.701Grounding metallic frames, casings, and other enclosures of electric equipment.
- § 75.701-1Approved methods of grounding of equipment receiving power from ungrounded alternating current power systems.
- § 75.701-2Approved method of grounding metallic frames, casings and other enclosures receiving power from single-phase 110-220-volt circuit.
- § 75.701-3Approved methods of grounding metallic frames, casings and other enclosures of electric equipment receiving power from direct current power systems with one polarity grounded.
- § 75.701-4Grounding wires; capacity of wires.
- § 75.701-5Use of grounding connectors.
- § 75.702Protection other than grounding.
- § 75.702-1Protection other than grounding; approved by an authorized representative of the Secretary.
- § 75.703Grounding offtrack direct-current machines and the enclosures of related detached components.
- § 75.703-1Approved method of grounding.
- § 75.703-2Approved grounding mediums.
- § 75.703-3Approved methods of grounding offtrack mobile, portable and stationary direct-current machines.
- § 75.703-4Other methods of protecting offtrack direct-current equipment; approved by an authorized representative of the Secretary.
- § 75.704Grounding frames of stationary high-voltage equipment receiving power from ungrounded delta systems.
- § 75.704-1Approved methods of grounding.
- § 75.705Work on high-voltage lines; deenergizing and grounding.
- § 75.705-1Work on high-voltage lines.
- § 75.705-2Repairs to energized surface high-voltage lines.
- § 75.705-3Work on energized high-voltage surface lines; reporting.
- § 75.705-4Simultaneous repairs.
- § 75.705-5Installation of protective equipment.
- § 75.705-6Protective clothing; use and inspection.
- § 75.705-7Protective equipment; inspection.
- § 75.705-8Protective equipment; testing and storage.
- § 75.705-9Operating disconnecting or cutout switches.
- § 75.705-10Tying into energized high-voltage surface circuits.
- § 75.705-11Use of grounded messenger wires; ungrounded systems.
- § 75.706Deenergized underground power circuits; idle days—idle shifts.
- § 75.800High-voltage circuits; circuit breakers.
- § 75.800-1Circuit breakers; location.
- § 75.800-2Approved circuit schemes.
- § 75.800-3Testing, examination and maintenance of circuit breakers; procedures.
- § 75.800-4Testing, examination, and maintenance of circuit breakers; record.
- § 75.801Grounding resistors.
- § 75.802Protection of high-voltage circuits extending underground.
- § 75.803Fail safe ground check circuits on high-voltage resistance grounded systems.
- § 75.803-1Maximum voltage ground check circuits.
- § 75.803-2Ground check systems not employing pilot check wires; approval by the Secretary.
- § 75.804Underground high-voltage cables.
- § 75.805Couplers.
- § 75.806Connection of single-phase loads.
- § 75.807Installation of high-voltage transmission cables.