SUBPART I—Underground High-Voltage Distribution (§75.800 to §75.834)
- 75.800—High-voltage circuits; circuit breakers.
- 75.800-1—Circuit breakers; location.
- 75.800-2—Approved circuit schemes.
- 75.800-3—Testing, examination and maintenance of circuit breakers; procedures.
- 75.800-4—Testing, examination, and maintenance of circuit breakers; record.
- 75.801—Grounding resistors.
- 75.802—Protection of high-voltage circuits extending underground.
- 75.803—Fail safe ground check circuits on high-voltage resistance grounded systems.
- 75.803-1—Maximum voltage ground check circuits.
- 75.803-2—Ground check systems not employing pilot check wires; approval by the Secretary.
- 75.804—Underground high-voltage cables.
- 75.805—Couplers.
- 75.806—Connection of single-phase loads.
- 75.807—Installation of high-voltage transmission cables.
- 75.808—Disconnecting devices.
- 75.809—Identification of circuit breakers and disconnecting switches.
- 75.810—High-voltage trailing cables; splices.
- 75.811—High-voltage underground equipment; grounding.
- 75.812—Movement of high-voltage power centers and portable transformers; permit.
- 75.812-1—Qualified person.
- 75.812-2—High-voltage power centers and transformers; record of examination.
- 75.813—High-voltage longwalls; scope.
- 75.814—Electrical protection.
- 75.815—Disconnect devices.
- 75.816—Guarding of cables.
- 75.817—Cable handling and support systems.
- 75.818—Use of insulated cable handling equipment.
- 75.819—Motor-starter enclosures; barriers and interlocks.
- 75.820—Electrical work; troubleshooting and testing.
- 75.821—Testing, examination and maintenance.
- 75.822—Underground high-voltage longwall cables.
- 75.823—Scope.
- 75.824—Electrical protection.
- 75.825—Power centers.
- 75.826—High-voltage trailing cables.
- 75.827—Guarding of trailing cables.
- 75.828—Trailing cable pulling.
- 75.829—Tramming continuous mining machines in and out of the mine and from section to section.
- 75.830—Splicing and repair of trailing cables.
- 75.831—Electrical work; troubleshooting and testing.
- 75.832—Frequency of examinations; recordkeeping.
- 75.833—Handling high-voltage trailing cables.
- 75.834—Training.