View all text of Subpart J [§ 75.900 - § 75.907]
§ 75.900-4 - Testing, examination, and maintenance of circuit breakers; record.
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.