30 C.F.R. § 77.1801-1 Devices for overcurrent protection.
Title 30 - Mineral Resources
Automatic circuit interrupting devices that will deenergize the affected circuit upon occurrence of a short circuit at any point in the system will meet the requirements of §77.1801.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart S—Trolley Wires and Trolley Feeder Wires
§ 77.1801-1 Devices for overcurrent protection.
