{"data":{"id":"us/30-cfr-75.1103-8","jurisdiction":"us","citation":"30 CFR 75.1103-8","heading":"-8 Automatic fire sensor and warning device systems; examination and test requirements.","body":"(a) Automatic fire sensor and warning device systems shall be examined at least once each shift when belts are operated as part of a production shift. A functional test of the warning signals shall be made at least once every seven days. Examination and maintenance of such systems shall be by a qualified person.\n(b) A record of the functional test conducted in accordance with paragraph (a) of this section shall be maintained by the operator and kept for a period of one year.\n(c) Sensors shall be calibrated in accordance with the manufacturer's calibration instructions at intervals not to exceed 31 days. A record of the sensor calibrations shall be maintained by the operator and kept for a period of one year.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","Subpart L—Fire Protection"],"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":"a47b9dd66bb99572fabf0b7b17ed7f9e4ee65411d0d4de41b2a9708deee4ff7a","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-75.1103-7","next":"us/30-cfr-75.1103-9"},"notice":"GroundRules: Original legal text. Not legal advice."}