Common Wire 3 Way Switch

The wiring method will depend on whether your power goes to the switch first or the light first.

Common wire 3 way switch. The hot wire from the breaker usually black neutral. If the white is correctly used for neutral the connected switching wires are red and black. Ignore the green ground screw of course. Three way switch wiring.

That is simply the supply being split off to also supply something else. Iâ ve decided to put this faq together to help those with questions about installing ge 3 way switches. Three way switches can be wired in a number of different ways depending on where they are located relative to the light fixture in the circuit cable runs. It s not unusual to have 2 wires on the common terminal.

What is common in the diagrams above and with any 3 way switch circuit is that the power hot wire coming into the circuit will always go to the common terminal of the first switch. The red and black wires travelers of the 3 wire cable get connected to the common terminals on the three way switch. The common wire is associated with the differently colored screw on a 3 way switch so it s the black screw in your case. That is more clear if it uses a pigtail and feel free to convert it to a pigtail if you prefer.

For example they can be arranged so that the feed cable runs to the first three way switch then to the light fixture box then to the second three way switch. In standard house wiring north america the incoming power leads are usually black hot and white neutral. The white neutral is often referred to as common but the colored wires are both used as hot wires alternately as the possible switch positions are made. 3 way switches are useful for large rooms with multiple entrances but require a bit more wiring than a standard single pole switch.

This 3 way light switch wiring diagram shows how to do the light switch wiring and the light when the power is coming to the light fixture. In this diagram power enters the fixture box. The hot wire from light always goes to the common terminal of the second switch. Red and blue wires link traveler terminals of both switches.

Every 3 way switch configuration is different. The white line neutral wire gets connected to the white wire of the 14 3 cable. The switch wiring for three ways is normally red black and white. You have to be especially careful with smart switch 3 ways.

It doesn t matter which traveler goes on which common terminal.