Asked by: Leizuri Gullmar
asked in category: General Last Updated: 23rd April, 2020

How do you hook up a 3 way switch?

Either way, complete these five steps for 3 way light switch wiring:
  1. Turn off the correct circuit at your electrical panel.
  2. Add an electrical box for the second three-way switch in the basement.
  3. Feed a length of 14-3 type NM cable (or 12-3, if you're connecting to 12-gauge wire) between the two boxes.

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Also, how does a 3 way switch work?

"3-way" is the electrician's designation for a single pole double throw (SPDT) switch. The switches must create a complete circuit for current to flow and the bulb to light. When both switches are up, the circuit is complete (top right). When both switches are down, the circuit is complete (bottom right).

Also, what color wire goes to the black screw on a 3 way switch? The black wire from the circuit breaker panel gets attached to the black screw on the 3-way switch. The black and red wires from the white cable running between the switches get connected to either of the two brass screws on the switch. On the other end, the two white wires are wire nutted together.

Regarding this, does it matter which wire goes where on a light switch?

Properly you should have a black always hot wire bringing power in and a red wire going to the light. Red means the line may be switched. Sometimes electricians go cheap and use black instead of red. If your switch has a “LINE” marking, the always hot wire goes to this.

What is the red wire in a 3 way switch?

Red and blue wires link traveler terminals of both switches. The red wire, which is connected to the first switch's common terminal, leads back to the fixture.

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