3 Way Switch Wiring Diagram. This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. The black and red wires between sw1 and sw2 are connected to the traveler terminals. Now discussing 3 way light switch wiring diagram as also discussed above the color codes of the wires as having three insulated conductors as black as hot red as switch wire or called traveler and white as common wire as also shown when light is connected to both black and white wires.
Take a closer look at a 3 way switch wiring diagram. This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. Note that these diagrams assume that you re following all recommended practices for safe installation of electrical circuits. What is the black screw for on a 3 way switch diagram.
Always turn off the power to the circuit before working with exposed wires.
In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. It s important to recognize that a light switch is designed to interrupt the hot wire when it s turned off. 3 way switch wiring diagram. Wiring diagram 3 way switch with light at the end in this diagram the electrical source is at the first switch and the light is located at the end of the circuit. This might seem intimidating but it does not have to be.