General Order 64-A

Section XI

Supply Lines And Communication Lines Crossings Over Railways

113.6    Trolley Contact Wires.

Unless electric railroad systems are protected by interlocking plant at grade crossings with interurban or other heavy or high speed railway systems, the trolley contact conductors shall be at the same elevation above their own tracks throughout the crossing and next adjoining spans and, in addition thereto, catenary construction shall be provided where crossing spans exceed 100 feet.  (See Appendix G, Figs. 67 and 68.)  This rule is not intended to apply where pantagraph collector or similar device is used.