General Order 95
Detailed Construction Requirements for Trolley and Electric Railway
Contact and Feeder Conductors and Their Supporting Messengers,
Span Wires, Etc. (Class T Circuits)
79.2 Protective Guards and Coverings
Every third rail whether carried in subways, on elevated structures or on completely fenced rights–of–way, shall be protected by suitable guards and coverings made of insulating, impact resistant material and of such form as will present a minimum of third rail exposure.