30 C.F.R. § 75.900-4 Testing, examination, and maintenance of circuit breakers; record.
Title 30 - Mineral Resources
The operator of any coal mine shall maintain a written record of each test, examination, repair, or adjustment of all circuit breakers protecting low- and medium-voltage circuits serving three-phase alternating current equipment used in the mine. Such record shall be kept in a book approved by the Secretary. [35 FR 17890, Nov. 20, 1970, as amended at 60 FR 33723, June 29, 1995]
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart J—Underground Low- and Medium-Voltage Alternating Current Circuits
§ 75.900-4 Testing, examination, and maintenance of circuit breakers; record.
