General Order 64-A
Detailed Construction Requirements For Trolley Lines
(Class T Circuits)
The following rules cover certain special details for the construction of Class T circuits, together with their supporting messengers, span wires and appurtenances. These rules are in many cases supplemental to the rules for supply lines in general (Class T circuits being be definition supply lines), which general rules, including construction details of Section V, must be observed, except where clearly inapplicable or where specifically modified herein.