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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 30 - Mineral Resources |
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Chapter I - Mine Safety and Health Administration, Department of Labor |
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SubChapter O - Coal Mine Safety and Health |
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Part 75 - Mandatory Safety Standards - Underground Coal Mines |
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Subpart L - Fire Protection |
§ 75.1103-7 - Electrical components; permissibility requirements.
Latest version.
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§ 75.1103-7 Electrical components; permissibility requirements.
The electrical components of each automatic fire sensor and warning device system shall:
(a) Remain functional when the power circuits are deenergized as required by § 75.706; and
(b) Be provided with protection against ignition of methane or coal dust when the electrical power is deenergized as required by § 75.313, but these components shall be permissible or intrinsically safe if installed in a return airway.
[37 FR 16546, Aug. 16, 1972, as amended at 57 FR 20929, May 15, 1992]