{"data":{"id":"us/30-cfr-75.900-4","jurisdiction":"us","citation":"30 CFR 75.900-4","heading":"-4 Testing, examination, and maintenance of circuit breakers; record.","body":"The operator of any coal mine shall maintain a written record of each test, examination, repair, or adjustment of all circuit breakers protecting low- and medium-voltage circuits serving three-phase alternating current equipment used in the mine. Such record shall be kept in a book approved by the Secretary.","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 J—Underground Low- and Medium-Voltage Alternating Current Circuits"],"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":"60183164e8cf038e8bd27f478cc5b39312d855112116b86b46e7a06879d245e0","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-75.900-3","next":"us/30-cfr-75.901"},"notice":"GroundRules: Original legal text. Not legal advice."}