See Below.īlack wire = Power or Hot wire White wire = Neutral Bare copper = Ground The 3-wire cable consist of a black wire, a white wire and a bare copper wire, while the 4-wire cable has an added red wire which is hot as well. Then a 4-wire cable going between the two 3-way switches and then a 3-wire cable going from the switches to the load. When wiring a 3-way switch circuit, we will be using a 3-wire cable known as romex coming from the source (such as the breaker box). a couple examples would be:Įach 3-way switch in these examples are controlling the power source to the same load. When wiring a 3-way switch circuit, What were doing is simply controlling the power flow (Switching off/on) to the load (a light, lamp, outlet, ceiling fan etc.) from 2 different locations. It should also help in understanding the functions of each type of switch. Go to my Switch Terminology Page where I discuss the terms used for the different types of home electrical switches.
First of all we need to go over a little basic terminology on switches. Wiring a 3-way switch is a little more tricky than wiring a 2-way switch.
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