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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 O—Hoisting and Mantrips (§75.1400 to §75.1438) > 75.1402-2—Tests of signaling systems.
75.1402-2—Tests of signaling systems.
Signaling systems used for communication between shaft stations and the hoist room shall be tested daily.