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Title 30

Displaying title 30, up to date as of 8/07/2026. Title 30 was last amended 8/07/2026.
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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 77Mandatory Safety Standards, Surface Coal Mines and Surface Work Areas of Underground Coal Mines77.1 – 77.2104
Subpart ISurface High-Voltage Distribution77.800 – 77.811
§ 77.800High-voltage circuits; circuit breakers.
§ 77.800-1Testing, examination, and maintenance of circuit breakers; procedures.
§ 77.800-2Testing, examination, and maintenance of circuit breakers; record.
§ 77.801Grounding resistors.
§ 77.801-1Grounding resistors; continuous current rating.
§ 77.802Protection of high-voltage circuits; neutral grounding resistors; disconnecting devices.
§ 77.803Fail safe ground check circuits on high-voltage resistance grounded systems.
§ 77.803-1Fail safe ground check circuits; maximum voltage.
§ 77.803-2Ground check systems not employing pilot check wires; approval by the Secretary.
§ 77.804High-voltage trailing cables; minimum design requirements.
§ 77.805Cable couplers and connection boxes; minimum design requirements.
§ 77.806Connection of single-phase loads.
§ 77.807Installation of high-voltage transmission cables.
§ 77.807-1High-voltage powerlines; clearances above ground.
§ 77.807-2Booms and masts; minimum distance from high-voltage lines.
§ 77.807-3Movement of equipment; minimum distance from high-voltage lines.
§ 77.808Disconnecting devices.
§ 77.809Identification of circuit breakers and disconnecting switches.
§ 77.810High-voltage equipment; grounding.
§ 77.811Movement of portable substations and transformers.