Here is one more variation, with the cable from the panel going directly to the light box, which is in turn between some of the switches. On three-way switches, two terminals are the same color and the third terminal—called the common terminal—is a different metal or color. Attach it to the white wire of the wire running to the switch. Wiring four lights on one switch, or daisy chaining as it is also called, is an efficient way to control lighting for homes and business. Put a piece of tape on the wire that goes to the common terminal screw.
In the light fixture's box, there will be two 3 wire cables. Article Summary To wire a 3 way light switch, you'll need 2 3-way light switches, 2 2-wire non-metallic cables, 1 3-wire non-metallic cable, and 2 6-inch grounding wires. To test a 3 way switch, connect one meter probe to the common terminal and the other to one of the travelers. To test a 4 way switch, connect one probe to one traveler terminal in a pair and the other probe to one traveler terminal in the other pair. To make this circuit work, a 3 way dimmer can be used in place of one, or both of the standard 3 way switches. Hey, doing it yourself is great but if you are unsure of the advice given or the methods in which to job is done, don't do it. With this in mind, the white wire from the power source always goes uninterrupted to the light fixture and the bare grounding wires are always fastened to grounding screws.
Check here for and For circuits that control lights from two locations only, check the Wiring a 4 Way Switch with Light at the End In this basic 4 way light circuit, 3-wire cable runs between all the switches and 2-wire cable runs from the last switch to the light. Flipping the 4-way in the middle should turn it off or on as well. The black and red wires running between switches are used as travelers in this circuit. At least now you have a general idea of how 3 and 4-way switches are wired, should you want to install or troubleshoot them in the future. To create this article, 10 people, some anonymous, worked to edit and improve it over time.
The black line wire connects to the common terminal of the first 3- way switch. Mark it with a black marker or paint the end black to indicate it is hot. The new light switch and old ones are just not looking the same. In any case, the traveler wires will be colored the same to distinguish them from the common. In particular, it is often convenient and efficient to place a light between two switches or between the panel and the first switch. There is no way we can anticipate every situation and we do our best to inform of any risks for each job.
Lets start wiring a four way switch. Here is an example of a light in the middle of the run. Configuration One: Power to the Switch For the first configuration, the power comes to the switch and then goes to the light. It is not, however, authorized for use in all installations, such as being embedded in concrete or where exposed to the risk of physical damage. With 2 lights, it is spliced with the white wire running to the switches. This white wire is wrapped with black tape to mark it as hot.
Place all the 4-way switches between the two, 3-way switches. When obtaining power from a nearby electrical outlet or another circuit device, the new wiring must be the same size as those that supply the outlet. Just watch the 4-way switch video once more to see how easy it is to connect the wires to the correct screws. Again, connect all ground wires as previously described, if not already completed. However, it can be done with a little patience and attention to detail.
You can test the switches using the procedure described below. Note: there are several ways to install a 3 Way Light Switch. Once the copper wires are twisted together, apply a wire nut to the end securely. The light's black wire should be attached to the black wire running to the first switch. Two of the white wires must be remarked black where the feed the switches.
Once you have done that for both wires coming out of the box, you will see two black wires, two white wires, and two bare copper wires. If you have a multimeter, use the continuity setting. Color the end black with black paint or a black marker to indicate it is hot. Other installers prefer to use two-wire cables from each switch to the next, purely for the travelers, and to run the hot or switched hot a different route to and from the fixture. Just read it slowly, take a few breaths if you have to, and everything will be fine. The first light box will only have two black wires twisted together, the jumper and the switching feed wire. They should all function properly.
I have added an additional photo of a 4way switch to this article which shows how the screw terminals at the top are one color, and the bottom are a different color. You want to zig-zag them, so they come about a bit like an accordion. At the first switch a 3-way switch , the white wire hot coming from the light, will be connected to the dark colored screw. For many of these configurations, the best course is to to install your 3-way switch to ensure everything is done safely and correctly. Repeat on the other end and run it into your second switch box. Back at the first 3-way switch, wire nut the two white wires together.