{"data":{"id":"us/30-cfr-77.802","jurisdiction":"us","citation":"30 CFR 77.802","heading":"Protection of high-voltage circuits; neutral grounding resistors; disconnecting devices.","body":"High-voltage circuits supplying portable or mobile equipment shall contain either a direct or derived neutral which shall be grounded through a suitable resistor at the source transformers, and a grounding circuit, originating at the grounded side of the grounding resistor, shall extend along with the power conductors and serve as a grounding conductor for the frames of all high-voltage equipment supplied power from that circuit, except that the Secretary or his authorized representative may permit other high-voltage circuits to feed stationary electrical equipment, if he finds that such exception will not pose a hazard to the miners. Disconnecting devices shall be installed and so equipped or designed in such a manner that it can be determined by visual observation that the power is disconnected.","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":"c7da8c72947216bc8edd90ac4367ece37c5c7fe479b9e767d56f3a931632b4ae","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-77.801-1","next":"us/30-cfr-77.803"},"notice":"GroundRules: Original legal text. Not legal advice."}