STANDARD SYMBOLS FOR WIRING PLANS As adopted and recommended by The National Electrical Contractors Association of ... numeral, thus: Si XII, meaning 12 4 Wav Switch Outlet / Single Pole Switches, a 4-way Switch Outlet. ... STANDARD SYMBOLS (Continued) Arac a -Al a Pole Line. , Branch Circuit run exposed.
|Title||:||Standard Wiring for Electric Light and Power|
|Author||:||Harry Cooke Cushing|