30 CFR § 75.516-2 Communication wires and cables; installation; insulation; support. (a) All communication wires shall be supported on insulated hangers
or insulated J-hooks. (b) All communication cables shall be insulated as required by
§75.517-1, and shall either be supported on insulated
or uninsulated hangers or J-hooks, or securely attached to messenger wires,
or buried, or otherwise protected against mechanical damage in a manner
approved by the Secretary or his authorized representative. (c) All communication wires and cables installed in track entries
shall, except when a communication cable is buried in accordance with
paragraph (b) of this section, be installed on the side of the entry opposite
to trolley wires and trolley feeder wires. Additional insulation shall be
provided for communication circuits at points where they pass over or under
any power conductor. (d) For purposes of this section, communication cable means two or
more insulated conductors covered by an additional abrasion-resistant
covering.
[38 FR 4975, Feb. 23, 1973]
