CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER O—COAL MINE SAFETY AND HEALTH (parts 70 to 90) > PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES > SUBPART J—Underground Low- and Medium-Voltage Alternating Current Circuits (§75.900 to §75.907) > 75.900-4—Testing, examination, and maintenance of circuit breakers; record.

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.

Code of Federal Regulations

[35 FR 17890, Nov. 20, 1970, as amended at 60 FR 33723, June 29, 1995]