Detailed Construction Requirements for Trolley
and Electric Railway
Contact and Feeder Conductors and Their Supporting Messengers,
Span Wires, Etc. (Class T Circuits)
74.7 Climbing and Working Space
The requirements of Rule 54.7 apply to poles supporting Class T conductors except where in accordance with the provisions of Rule 74.4-D conductors are permitted to have clearances from center line of pole less than are specified in Table 1, Case 8.