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 § 77.901-1
30 CFR § 77.901-1
Grounding resistor; continuous current rating
July 29, 2020
CFR

The ground fault current rating of grounding resistors shall meet the “extended time rating” set forth in American Institute of Electrical Engineers Standard No. 32.

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§ 77.901 Protection of low- and medium-voltage three-phase circuits
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§ 77.902 Low- and medium-voltage ground check monitor circuits

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