Connect the black wire from the Romex cable to the dark-colored screw terminal (common terminal) in the same manner as step 3. Install another 3-way switch at the second location.Connect the bare copper wire (ground wire) from the Romex cable to the green or bare grounding screw on the switch.This connection does not involve the switch. Connect the two insulated white wires (neutral wires) from the Romex cable together with a wire connector.This wire will act as your "hot" wire, carrying the electrical current. Connect the black wire from the Romex cable to the dark-colored screw terminal (common terminal). Install a 3-way switch at the first location.The 3-way switch will have three screw terminals, while the 4-way switch typically has four. One will be the "3-way" switch, and the other will be the "4-way" switch. Determine the location of the two switches in your circuit.Turn off the power to the circuit at the main breaker panel.To wire a 3-way switch with 12/2 Romex cable (commonly referred to as 122 Romex), follow the steps below: See the diagram below.Ĭontinue reading here: Dedicated circuit electrical wiring diagrams I don’t know where that word came from, but if you need to have a light controlled from three locations, you will need to start with a three-way, put a four-way in the middle, and end with another three-way. They’re only two-way if you consider that a light can only be controlled from two locations with three-way switches. Three-way switches aren’t really “three way” at all. Any place where there is a doorway or entrance should have a light switch. You will want to be able to turn the same light on or off from any surrounding part of the garage outside or inside. You need to be able to turn the garage light on when you’re entering from outside, or entering from upstairs, or downstairs into the garage. Many homes, especially those with garages, have lights controlled from many locations. You can have one light that is controlled from a dozen locations, but you’ll start with a three-way switch at the start of the light circuit, place ten four-ways in between, and then end with another three-way switch. Just remember this one thing: four-way switches are always between three-way switches. You might have to go to an electric supply store for these switches.Īnother way is to put the light at the end of the switches as shown in the light switch wiring diagram below.įour-way switches sound confusing, but they are quite simple. The easiest way for three-ways is to place the light between the two switches. Three-way switches are a little confusing at first, but after you look at the diagram and think it through, it’ll make perfect sense. In this case, an extra hot wire is needed so it is legal to paint or wrap electricians’ tape around both ends of the white wire. The diagram below shows a single-pole with the switch behind the light. That’s why there are two hot (black) wires each going in and out of the switch. Remember that the switch does nothing more than completes the electrical circuit when it is turned on. The diagram below shows a simple single pole light switch diagram with the switch before the light in the circuit run. The color of the wires is especially important, so you may want to squint at the drawings to better understand them. Lights that are controlled from two or more switches are more complicated because they require 12-3 Romex and special 3-way switches. 12-2 Romex is perfect for these types of lighting circuits. Home electrical wiring for lights is easy to install for simple lights that are controlled from one switch. Also kitchen lighting, office lighting, dining room lighting, and family room lights.We’ll also talk about 3-way light switches and show wiring diagrams for them and other circuits. A good house design plan includes light switch wiring for interior light fixtures and bath fixture lighting.
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