GroundRules
30 CFR 75.703-2: -2 Approved grounding mediums.
Where this section sits in the code
- Title 30—Mineral Resources
- CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
- SUBCHAPTER O—COAL MINE SAFETY AND HEALTH
- PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
- Subpart H—Grounding
For purposes of grounding offtrack direct-current machines, the following grounding mediums are approved:
(a) The grounded polarity of the direct-current power system feeding such machines; or,
(b) The alternating current grounding medium where such machines are fed by an ungrounded direct-current power system originating in a portable rectifier receiving its power from a section power center. However, when such a medium is used, a separate grounding conductor must be employed.
Collected 2026-08-27T02:25:24Z. Source file · JSON