30 C.F.R. § 77.506-1 Electric equipment and circuits; overload and short circuit protection; minimum requirements.
Title 30 - Mineral Resources
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.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart F—Electrical Equipment—General
§ 77.506-1 Electric equipment and circuits; overload and short circuit protection; minimum requirements.
