General Order 64-A

Section V

Detailed Construction Requirements For Supply Lines

(Class H, L and T Circuits)

57.8    Bonding and Grounding.

Longitudinal runs of supply circuits in cable (including tree wire in ring construction) shall be such that under the maximum loading conditions the tension in the messenger shall not exceed values of safe working tensions given in Rule 49.7-B, Table 8.  The messenger shall be grounded at both ends and at intermediate points not exceeding 800 feet apart.  Where the cable is enclosed in a metal sheath or armor, each section is enclosed in a metal sheath shall be permanently bonded to the messenger at not less than two locations.  

Note    This Rule was modified by Supplement 1.  To see the changes made by supplement 1 click here.  This page contains the wording of the rule prior to Supplement 1.