{"data":{"id":"us/30-cfr-57.12050","jurisdiction":"us","citation":"30 CFR 57.12050","heading":"Installation of trolley wires.","body":"Trolley wires shall be installed at least seven feet above rails where height permits, and aligned and supported to suitably control sway and sag.","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":"fe84eb0be2c2e57988e69d7f7bf34762dcd57db969cd09816938455605a9ae01","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.12048","next":"us/30-cfr-57.12053"},"notice":"GroundRules: Original legal text. Not legal advice."}