{"data":{"id":"us/30-cfr-77.800","jurisdiction":"us","citation":"30 CFR 77.800","heading":"High-voltage circuits; circuit breakers.","body":"High-voltage circuits supplying power to portable or mobile equipment shall be protected by suitable circuit breakers of adequate interrupting capacity which are properly tested and maintained and equipped with devices to provide protection against under voltage, grounded phase, short circuit and overcurrent. High-voltage circuits supplying power to stationary equipment shall be protected against overloads by either a circuit breaker or fuses of the correct type and capacity.","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 I—Surface High-Voltage Distribution"],"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":"74718c6f5e92e9c0996af6e907d177a02eca1d54d76ee1af7813e26a57548ddf","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-77.705","next":"us/30-cfr-77.800-1"},"notice":"GroundRules: Original legal text. Not legal advice."}