Original General Order 95 

Section VIII

Detailed Construction Requirements for Communication Lines
(Class C Circuits) 

89.4    Cables and Messengers

Where private communication circuits are carried in cables the provisions of Rule 87 shall apply, except that such circuits may be carried in cables on crossarms which support supply conductors, under the provisions of Rule 89.2-A, in which case the requirements of Rule 57 shall apply to such private communication cables.