{"data":{"id":"us/30-cfr-57.12004","jurisdiction":"us","citation":"30 CFR 57.12004","heading":"Electrical conductors.","body":"Electrical conductors shall be of a sufficient size and current-carrying capacity to ensure that a rise in temperature resulting from normal operations will not damage the insulating materials. Electrical conductors exposed to mechanical damage shall be protected.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES","Subpart K—Electricity"],"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":"be834da9d160627dd7a937982db548433ab2d82d637619e03339d7ac4e4669a2","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.12003","next":"us/30-cfr-57.12005"},"notice":"GroundRules: Original legal text. Not legal advice."}