On the other three way switch the load wire the load is the wire that feeds power to the light fixture gets connected to the copper or black screw terminal. Wall switches used to control ceiling light fixtures or other fixtures come in three types.
How To Wire A 4 Way Switch
3 way switch all wires hot. They are just wired that depending which way the switches are set neither on. When wiring a 3 way switch circuit all we want to do is to control the black wire hot wire to turn on and off the load from 2 different locations. How to determine the correct wires to attach to a 3 way switch when the wire and screw terminal color code is not certain. In some all variations of a three way switch either of two wires may be hot. You will always have 2 hots on a 3 way switch. If you are using blackwhite wire no combination is right.
Three way switches have three terminals with the one that is not for the two travelers being called the common. Its a foolproof way for a proper connection. This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. Bare copper ground. On one of the 3 way switches a line or hot wire gets connected to the copper or black screw terminal. At the hot end the incoming hot wire is connected to the common terminal.
At the leg end the wire attached at the common is the one that goes to the lights. The diagram below will give you a better understanding how this circuit is wired. This will all be made clear in the diagrams that follow. Most common is the single pole switch the type used to control a light fixture from a single locationthe next most common is the three way switch which is commonly used to control a light fixture from two different locations. In this diagram the incoming hot wire attaches to the first switchs common dark colored terminal. Turn off the power and mark it so you dont confuse it with the 3 way circuit wires.
There is no off on a 3 way switch. It would be up to you to mark the white wire so. For example a long hallway or stairway might use a pair of three way. If one of the black hot wires does have power then that is the wire for the always on plug. The hot wire leading from the 3 way switch circuit will have no power since all power must travel through the switches. You have power in and power out.
The two hot wires of three wire cable connect to a pair of brass colored traveler terminals on each switch. White wire neutral. Return to electrical article list.
Gallery of 3 Way Switch All Wires Hot
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