Electrical Wiring 3 Way Switch Wiring Schematic. Electrically a typical 3 way switch is a single pole double throw spdt switch. This is the most common and the easiest wiring diagram to follow of any of the wiring diagrams for a 3 way switch circuit.
Electrically a typical 3 way switch is a single pole double throw spdt switch. Diagrams shown on this page are simplified for clarity. In the above diagram the white wire must be re identified as a hot wire at each switch location.
Red and blue wires link traveler terminals of both switches.
This wire diagram shows the wiring for source power into the first three way switch then 3 wire cable to the next 3 way light switch and then on to the light or light fixtures. An example of three way switch wiring with the line and load in the same 4 square electrical box. 3 way switch wiring diagram with line and load in the same switch box. Wire a switched outlet.
