Mine Safety and Health Administration (MSHA) - Code of Federal Regulations - 30 CFR 77.506-1
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MSHA - Title 30 CFR
30 CFR § 77.506-1

Electric equipment and circuits; overload and short circuit protection; minimum requirements.

Devices providing either short circuit protection or protection against overload shall conform to the minimum requirements for protection of electric circuits and equipment of the National Electric Code, 1968.




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