Detailed Construction Requirements for Trolley
and Electric Railway
Contact and Feeder Conductors and Their Supporting Messengers,
Span Wires, Etc. (Class T Circuits)
71.6 Marking and Guarding
Poles supporting only Class T conductors in excess of 750 volts not on crossarms need not be marked as supporting high voltage conductors as required by Rule 51.6.
B. Guarding of Latticed Poles and Latticed Structures (see Rule 51.6-B)