Code of Federal Regulations
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30 CFR Mineral Resources
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I Mine Safety and Health ...
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O Coal Mine Safety and He...
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77 Mandatory Safety Stand...
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Subpart I —
Surface High-Voltage Distribution
§77.800 —
High-voltage circuits; circuit breakers
§77.800-1 —
Testing, examination, and maintenance of circuit breakers; procedures
§77.800-2 —
Testing, examination, and maintenance of circuit breakers; record
§77.801 —
Grounding resistors
§77.801-1 —
Grounding resistors; continuous current rating
§77.802 —
Protection of high-voltage circuits; neutral grounding resistors; disconnecting devices
§77.803 —
Fail safe ground check circuits on high-voltage resistance grounded systems
§77.803-1 —
Fail safe ground check circuits; maximum voltage
§77.803-2 —
Ground check systems not employing pilot check wires; approval by the Secretary
§77.804 —
High-voltage trailing cables; minimum design requirements
§77.805 —
Cable couplers and connection boxes; minimum design requirements
§77.806 —
Connection of single-phase loads
§77.807 —
Installation of high-voltage transmission cables
§77.807-1 —
High-voltage powerlines; clearances above ground
§77.807-2 —
Booms and masts; minimum distance from high-voltage lines
§77.807-3 —
Movement of equipment; minimum distance from high-voltage lines
§77.808 —
Disconnecting devices
§77.809 —
Identification of circuit breakers and disconnecting switches
§77.810 —
High-voltage equipment; grounding
§77.811 —
Movement of portable substations and transformers