A. Trolley wires and trolley feeder wires shall be installed on the side of the entry opposite the clearance space and shelter holes, except where the wires are guarded or 6 1/2 feet or more above the top of the rail.

B. Trolley-wire hangers shall be so spaced that the wire may become detached from any one hanger without creating a shock hazard.

C. Trolley wires shall be aligned properly and installed on insulated hangers at least six inches outside the rail.

D. Trolley wires and trolley feeder wires shall be provided with cut-out switches at intervals of not more than 1,500 feet and near the beginning of all branch lines.

E. Trolley wires and trolley feeder wires shall be kept taut and not permitted to touch the roof, ribs, timbers or any combustible material.

F. Trolley wires and trolley feeder wires shall be guarded adequately at both sides of doors and at all places where it is necessary to work or pass under them, unless they are more than six and one-half feet above the top of the rail.

G. Trolley wires and trolley feeder wires shall not extend beyond any open crosscut between intake and return airways, and shall be kept at least 150 feet from any active, open pillar workings.

H. Trolley wires and trolley feeder wires shall be guarded, anchored securely, and insulated properly at the ends.

I. Trolley wires and trolley feeder wires shall be installed only in intake air.

J. Trolley wires or other exposed conductors shall not carry more than 300 volts.

Code 1950, §§ 45-82, 45-82.1; 1954, c. 191; 1966, c. 594, § 45.1-78; 1993, c. 442; 1994, c. 28; 1996, c. 774; 1999, c. 256.