{"data":{"id":"us/30-cfr-75.703-2","jurisdiction":"us","citation":"30 CFR 75.703-2","heading":"-2 Approved grounding mediums.","body":"For purposes of grounding offtrack direct-current machines, the following grounding mediums are approved:\n(a) The grounded polarity of the direct-current power system feeding such machines; or,\n(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.","path":["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"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"5fdb8e2b6cf200ece68bbc6c74eb2f148d652d3c1451b1d779bdefd1705e96b9","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-75.703-1","next":"us/30-cfr-75.703-3"},"notice":"GroundRules: Original legal text. Not legal advice."}