Detailed Construction Requirements for Trolley
and Electric Railway
Contact and Feeder Conductors and Their Supporting Messengers,
Span Wires, Etc. (Class T Circuits)
Third rail construction or reconstruction shall not be permitted unless the third rail is protected by suitable guards made of wood or other suitable material. In lieu of such protecting on spurs and loading tracks, disconnecting switches may be used, which shall be locked open when cars are not being switched.