General Order 64-A

Section V

Detailed Construction Requirements For Supply Lines

(Class H, L and T Circuits)

52.5    Combination Arms.  (See Rules 32.5 and 54.8-B)

All conductors of the same voltage classification maintained at less than 4 foot vertical conductor separation must occupy the same end of the arm and a minimum horizontal separation of 42 inches must be maintained between the conductors of 0-750 volts and conductors of 750-7500 volts.