Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram. Wiring a 4 way switch is simply adding a switch to an already existing 3 way switch circuit.
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How to wire a 4 way switch diagram. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light. The black line wire connects to the common terminal of the first 3 way switch. The white wire is marked black at each end to mark it as hot. 4 way wiring source and light middle. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wirenut. When wiring in the 4 way switch it is most simply described as simply cutting the two traveler wires the two wires that go between the two 3 way switches and terminate on each switch and putting two wires from one switch on the top two terminals of the 4 way switch while putting the other two wires from the other switch on the bottom two terminals.
This 4 way switch diagram 2 shows the power source starting at the fixture. A 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch. Three wire cable runs between the switches and the outlet. I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects. Some 4 way switches may have the in and out pairs opposite each other rather than top and bottom. This 4 way switch diagram 1 shows the power source starting at the left 3 way switch.
Typical 4 way switch wiring nm cable in the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. This circuit is wired the same way as the 3 way lights at this link. First of all we need to go over a little basic terminology on switches. The red and white are used as travelers between the 4 way and sw2. In this diagram two 3 way switches control a wall receptacle outlet that may be used to control a lamp from two entrances to a room. Wiring a 3 way light switch.
The white wires get spliced through. The black wire running to the 4 way switch is connected to the hot terminal on the light and at the switch box its spliced to the black wire from the common on sw2. Attach the black and whiteblue traveler wires entering the 4 way switch box to the in terminals often the top terminals on the 4 way switch black on the left top pole and whiteblue on the right top pole. You would just continue from one 3 way switch box with the 143 three conductor cable two colored traveler wires a white neutral and a bare or green ground wire in and out of each four way switch box. How to wire a 4 way switch. This allows you to control a load from other locations in addition to the 2 locations that a 3 way circuit provides.
The red and black wires are connected to the four way switches. 3 way switched outlet wiring. A 3 wire nm connects the traveler terminals of the first 3 way switch and the first 4 way switch.
Gallery of How To Wire A 4 Way Switch Diagram
