General Order 95
Section VII
Detailed Construction Requirements for Trolley and Electric Railway
Contact and Feeder Conductors and Their Supporting Messengers,
Span Wires, Etc. (Class T Circuits)
78.2 Private Communication Conductors
The general requirements for private communication conductors
of trolley line systems are specified in Rules
20.6–A
, 32.4–C
and 89
of Section VIII
. In addition to the treatment therein provided, private communication wires
(Class C) owned by and used solely in the operation of trolley systems may,
where suitably insulated, be attached to span wires supporting trolley contact
conductors of such systems when installed and maintained in accordance with
the following provisions.
Note: Revised January 19, 1994 by Resolution
SU–25.
A. Attached to Unenergized Span Wires
Private communication conductors (Class C) may be supported
by unenergized portions of span wires provided they are attached between
the first span wire insulator specified in Rules
77.6–A1
and 77.6–A2
or the second span wire insulator specified in
Rule 77.6–A4
and the pole or structure. They shall not be attached to the section of
span wire between contact conductor hangers except within such section of
span wire sectionalized by means of insulators placed between 4 feet and
5 feet from each contact conductor hanger.
B. Attached to Energized Span Wires
Private communication conductors (Class C) may, where
necessary, be supported by feeder cables of 0 - 750 volts used as span wires
when such communication conductor attachments to feeder spans are insulated
for not less than the trolley voltage.