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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) > 75.903—Disconnecting devices.
75.903—Disconnecting devices.
Disconnecting devices shall be installed in conjunction with the circuit breaker to provide visual evidence that the power is disconnected.