1. LawStack
  2. Title 30 - Mineral Resources
  3. Chapter I - Mine Safety and Health Administration, Department of Labor
  4. Subchapter O - Coal Mine Safety and Health
  5. Part 77 - Mandatory Safety Standards, Surface Coal Mines and Surface Work Areas of Underground Coal Mines
  6. Subpart J - Low- and Medium-Voltage Alternating Current Circuits
  7. 30 CFR § 77.902-2
30 CFR § 77.902-2
Approved ground check systems not employing pilot check wires
May 28, 2026
CFR

§ 77.902-2 Approved ground check systems not employing pilot check wires.

Ground check systems not employing pilot check wires shall be approved by the Secretary only after it has been determined that the system includes a fail safe design causing the circuit breaker to open when ground continuity is broken.

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§ 77.902-1 Fail safe ground check circuits; maximum voltage
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§ 77.902-3 Attachment of ground conductors and ground check wires to equipment frames; use of separate connections

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