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Code of Federal Regulations (Last Updated: November 8, 2024) |
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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 |
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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 J - Low- and Medium-Voltage Alternating Current Circuits |
| § 77.900-1 - Testing, examination, and maintenance of circuit breakers; procedures. |
| § 77.900-2 - Testing, examination, and maintenance of circuit breakers; record. |
| § 77.900 - Low- and medium-voltage circuits serving portable or mobile three-phase alternating current equipment; circuit breakers. |
| § 77.901 - Protection of low- and medium-voltage three-phase circuits. |
| § 77.902 - Low- and medium-voltage ground check monitor circuits. |
| § 77.903 - Disconnecting devices. |
| § 77.904 - Identification of circuit breakers. |
| § 77.905 - Connection of single-phase loads. |
| § 77.906 - Trailing cables supplying power to low-voltage mobile equipment; ground wires and ground check wires. |
| § 77.901-1 - Grounding resistor; continuous current rating. |
| § 77.902-1 - Fail safe ground check circuits; maximum voltage. |
| § 77.902-2 - Approved ground check systems not employing pilot check wires. |
| § 77.902-3 - Attachment of ground conductors and ground check wires to equipment frames; use of separate connections. |