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 § 77.902-1
30 CFR § 77.902-1
Fail safe ground check circuits; maximum voltage
July 29, 2020
CFR

The maximum voltage used for ground check circuits under §77.902 shall not exceed 40 volts.

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§ 77.902 Low- and medium-voltage ground check monitor circuits
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§ 77.902-2 Approved ground check systems not employing pilot check wires

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