How to Wire a Dimmer SwitchĪ dimmer switch is wired the same way as a standard single-pole switch, but the dimmer often has it’s own wires already connected to the switch-so you use wire nuts instead of screw terminals. When an un-switched circuit continues from a switched light, this is how to wire it. Source goes to an additional un-switched light. Here the source is connected to the switch box before it continues to the light. This single-pole switch controls a light where the wire from the source goes directly to the light. The diagrams below show the various options. The right way to wire a standard single-pole light switch depends on where the switch is located relative to the light. Standard Single-pole Light Switch Circuit Diagram Single-Pole Switch Wiring Diagrams Electrical codes can vary on this practice-some allow it and some don’t. Because wiring switches requires a “switch leg” with two black wires, the white wire is converted to black with black tape or paint. Non-metallic cable used for wiring consists of one black wire, one white wire, and one bare or green grounding wire. This is sometimes done in homes that are wired with 3-wire non-metallic cable (such as the brand Romex®), as most houses are. LevitonĪgain…the electrical circuit’s white wires bypass the switch UNLESS…a white wire has been converted to do the job of a black wire. ![]() Single-pole light switch controls lights from one location. ![]()
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