30 C.F.R. § 75.900 Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit breakers.
Title 30 - Mineral Resources
[Statutory Provisions] Low- and medium-voltage power circuits serving three-phase alternating current equipment shall be protected by suitable circuit breakers of adequate interrupting capacity which are properly tested and maintained as prescribed by the Secretary. Such breakers shall be equipped with devices to provide protection against undervoltage, grounded phase, short circuit, and overcurrent.
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart J—Underground Low- and Medium-Voltage Alternating Current Circuits
§ 75.900 Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit breakers.
