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General Order 64-A


Section V


Detailed Construction Requirements For Supply Lines

(Class H, L and T Circuits)


52.4    Marking


A.    Voltage in Excess of 750.

All crossarms supporting only conductors carrying in excess of 750 volts shall be painted a bright yellow color, or in lieu thereof there shall be placed on the face and back of each of each cross arm a sign showing in white letters, not less than 3 inches in height on a green or black background, the words “High Voltage.”  The provisions of this paragraph shall be held not to apply to crossarms supporting supply conductors in excess of 17,000 volts which are situated in rural districts.


B.    Combination Arms.

Where supply circuits of 0-750 volts are carried on the same crossarm with circuits of 750-7500 volts, the sign shall be placed on the crossarm under the circuit of 750-7500 volts, or that end of the crossarm carrying circuits of 750-7500 volts shall be painted yellow from the center line of pole.

Where the crossarm carries circuits of 750-7500 volts on both ends, 2 signs shall be used on both face and back of the cross arm or the sign may be divided, the word “High” being placed on one end and “Voltage” on the other to show that the entire cross arm carries high voltage circuits.
  This rule does not apply to systems where circuits of 0-750 volts and circuits of 750-7500 volts are not usually carried on the same crossarm.


C.    Exceptions.


(1)    Heel Arms:  Where high voltage signs are used as the method of marking, they are not required on face of transformer heel arm.


(2)    Metal Poles, Towers and Structures:  Where metal poles, towers or structures which support conductors are marked as provided in Rules 51.6 and 68, such marking shall be deemed sufficient and no marking of the crossarm will be required.


Note    This Rule was modified by both Supplement 1 and Supplement 2.  To see the changes made by supplement 1 click here.  To see the changes made by supplement 2 click here.  This page contains the wording of the rule prior to Supplement 1.