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Underground Low- and Medium-Voltage Alternating Current Circuits | Midpage
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Code of Federal Regulations
Title 30
Chapter I
Subchapter O
Part 75
Subpart J
Underground Low- and Medium-Voltage Alternating Current Circuits
75.900
Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit breakers.
75.900-1
Circuit breakers; location.
75.900-2
Approved circuit schemes.
75.900-3
Testing, examination, and maintenance of circuit breakers; procedures.
75.900-4
Testing, examination, and maintenance of circuit breakers; record.
75.901
Protection of low- and medium-voltage three-phase circuits used underground.
75.902
Low- and medium-voltage ground check monitor circuits.
75.902-1
Maximum voltage ground check circuits.
75.902-2
Approved ground check systems not employing pilot check wires.
75.902-4
Attachment of ground conductors and ground check wires to equipment frames; use of separate connections.
75.903
Disconnecting devices.
75.904
Identification of circuit breakers.
75.905
Connection of single-phase loads.
75.906
Trailing cables for mobile equipment, ground wires, and ground check wires.
75.907
Design of trailing cables for medium-voltage circuits.
Appendix A to Subpart J of Part 75
30 C.F.R. Appendix A to Subpart J of Part 75