{"data":{"id":"us/30-cfr-75.701-3","jurisdiction":"us","citation":"30 CFR 75.701-3","heading":"-3 Approved methods of grounding metallic frames, casings and other enclosures of electric equipment receiving power from direct current power systems with one polarity grounded.","body":"For the purpose of grounding metallic frames, casings and enclosures of any electric equipment or device-receiving power from a direct-current power system with one polarity grounded, the following methods of grounding will be approved:\n(a) A solid connection to the mine track;\n(b) A solid connection to the grounded power conductor of the system;\n(c) Silicon diode grounding; however, this method shall be employed only when such devices are installed in accordance with the requirements set forth in paragraph (d) of § 75.703-3; and\n(d) Any other method, approved by an authorized representative of the Secretary, which insures that there is no difference in potential between such metal enclosures and the earth.","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":"aba9d78ad697534750f51c90727dc8fcf6fc808928f4917ffec20024a2e50286","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-75.701-2","next":"us/30-cfr-75.701-4"},"notice":"GroundRules: Original legal text. Not legal advice."}