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Title 30

Displaying title 30, up to date as of 7/15/2026. Title 30 was last amended 7/15/2026.
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Title 30Mineral ResourcesPart / Section
Chapter IMine Safety and Health Administration, Department of Labor1 – 199
Subchapter OCoal Mine Safety and Health70 – 90
Part 75Mandatory Safety Standards—Underground Coal Mines75.1 – 75.1916
Subpart IUnderground High-Voltage Distribution75.800 – 75.834
§ 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.
§ 75.808Disconnecting devices.
§ 75.809Identification of circuit breakers and disconnecting switches.
§ 75.810High-voltage trailing cables; splices.
§ 75.811High-voltage underground equipment; grounding.
§ 75.812Movement of high-voltage power centers and portable transformers; permit.
§ 75.812-1Qualified person.
§ 75.812-2High-voltage power centers and transformers; record of examination.
High-Voltage Longwalls75.813 – 75.834
§ 75.813High-voltage longwalls; scope.
§ 75.814Electrical protection.
§ 75.815Disconnect devices.
§ 75.816Guarding of cables.
§ 75.817Cable handling and support systems.
§ 75.818Use of insulated cable handling equipment.
§ 75.819Motor-starter enclosures; barriers and interlocks.
§ 75.820Electrical work; troubleshooting and testing.
§ 75.821Testing, examination and maintenance.
§ 75.822Underground high-voltage longwall cables.
§ 75.823Scope.
§ 75.824Electrical protection.
§ 75.825Power centers.
§ 75.826High-voltage trailing cables.
§ 75.827Guarding of trailing cables.
§ 75.828Trailing cable pulling.
§ 75.829Tramming continuous mining machines in and out of the mine and from section to section.
§ 75.830Splicing and repair of trailing cables.
§ 75.831Electrical work; troubleshooting and testing.
§ 75.832Frequency of examinations; recordkeeping.
§ 75.833Handling high-voltage trailing cables.
§ 75.834Training.
Appendix A to Subpart I of Part 75
Diagrams of Inby and Outby Switching