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 75 - MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
  6. Subpart H - Grounding
  7. 30 CFR § 75.703-4
30 CFR § 75.703-4
Other methods of protecting offtrack direct-current equipment; approved by an authorized representative of the Secretary
July 29, 2020
CFR

Other methods of maintaining safe voltage by preventing a difference between the frames of offtract direct-current machines and the earth must be approved by an authorized representative of the Secretary.

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§ 75.703-3 Approved methods of grounding offtrack mobile, portable and stationary direct-current machines
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§ 75.704 Grounding frames of stationary high-voltage equipment receiving power from ungrounded delta systems

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