General Order 64
Section XIII
Supply Lines Or Signal Lines Crossing Under Railway Structures
135
Warning Signs
Warning
signs of substantial character with letters not less than 3 inches in height
reading “High Voltage,” or “Danger, Electric Wires _ _ _ _ _ _ Volts,” stating
the normal voltage of highest circuits shall be placed at the points where
supply circuits carrying over 750 volts pass under a railroad structure. These signs shall be placed at each side of
the structure where the wires enter.