ECFR SNAPSHOT / CURRENT THROUGH 2026-08-19

30 CFR 75.900

Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit breakers.

CHAPTERCHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

PARTPART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES

SUBPARTSubpart J—Underground Low- and Medium-Voltage Alternating Current Circuits

CURRENT PUBLIC TEXT

[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.