30 C.F.R. Subpart S—Trolley Wires and Trolley Feeder Wires
Title 30 - Mineral Resources
Trolley wires and trolley feeder wires shall be provided with cutout switches at intervals of not more than 2,000 feet and near the beginning of all branch lines. Trolley wires and trolley feeder wires shall be provided with overcurrent protection. 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. Trolley wires, trolley feeder wires, and bare signal wires shall be adequately guarded: (a) At all points where men are required to work or pass regularly under the wires; and (b) At man-trip stations. The Secretary or his authorized representative shall specify other conditions where trolley wires and trolley feeder wires shall be adequately protected to prevent contact by any person, or shall require the use of improved methods to prevent such contact. Temporary guards shall be provided where trackmen and other persons are required to work in proximity to trolley wires and trolley feeder wires.
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
§ 77.1800 Cutout switches.
§ 77.1801 Overcurrent protection.
§ 77.1801-1 Devices for overcurrent protection.
§ 77.1802 Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley wires and trolley feeder wires.
