Section 43.34. Trolley wires

(a) Trolley wires shall be installed as far on one side of the tunnel as is practicable and shall be securely supported and the supports insulated.

(b) Suitable protection shall be provided at all places where men are required to work or pass under trolley or other bare power wires which are placed less than eight feet above top of rail. This may consist of channeling the roof or of placing boards along the wire, which shall extend at least three inches below it, or in the use of any other device that will afford ample protection. At all points where timbers or tools have to be unloaded or transferred up a raise, the trolley wires shall be boxed or otherwise protected as provided for in this section. All places where it is required that the trolley wires shall be boxed, shall be well lighted with electric lamps.