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Title 30 - Mineral Resources
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CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
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SUBCHAPTER O—COAL MINE SAFETY AND HEALTH (parts 70 to 90)
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PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
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SUBPART I—Surface High-Voltage Distribution (§77.800 to §77.811)
CFR
Title 1 - General Provisions
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Title 3 - The President
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Title 48 - Federal Acquisition Regulations System
Title 49 - Transportation
Title 50 - Wildlife and Fisheries
SUBPART I—Surface High-Voltage Distribution (§77.800 to §77.811)
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.
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