{"data":{"id":"us/30-cfr-77.904","jurisdiction":"us","citation":"30 CFR 77.904","heading":"Identification of circuit breakers.","body":"Circuit breakers shall be labeled to show which circuits they control unless identification can be made readily by location.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","Subpart J—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":"484c2c66f9dec179b72c7f95ce4c31455dde8327d61bbb22c7a5b80d28d21c79","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-77.903","next":"us/30-cfr-77.905"},"notice":"GroundRules: Original legal text. Not legal advice."}