A four switch configuration will have two 3 way switches one on each end and two 4 way switches in the middle. Four way switches are used in combination with three way switches.

Light Switch Connection Puzzle Doityourself Com Community
4 way switch connection. The first switch 3 way travelers brass color connect to one pair of the second switch 4 way travelers black or brass color. Turn on the light or device being controlled by the 3 way switches if you already have them. The white wires get spliced through. Starting with safety and understanding 1. 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. In the diagrams below the first switch 3 way common terminal connects to line voltage.
Each set of terminals is one of the toggle positions. 4 way wiring source and light middle. As you will see most 4 way switch wiring is placed between the wiring of two 3 way switches therefore a 4way switch is installed with two 3way switches. Connect the other pair of wires which lead to the second 3 way switch to the other pair of screws. The white wire is marked black at each end to mark it as hot. The last 3 way turns the lights on and off but when i use the first 3 way and 4 way it trips the breaker.
Return to location you plan to wire to verify that there is no electric flow to that device. The red and white are used as travelers between the 4 way and sw2. If the device is still. Turn off electric power. Four way switches are used to control lighting from three or more locations. A 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch.
4 way switch wiring 4 way switches provide switching from three or more locations. There are four terminals that provide two sets of toggle positions on a four way switch. In the 4 way box connect the pair of wires from the first 3 way switch to the in pair of screws of your 4 way switch. The red and black wires are connected to the four way switches. The 4 way is wired with the power to the 3 way switch first then the 4 way 3 way and then lights. If more than three switches are needed simply place more 4 way switches between the three way switches.
How to wire 4 way light switch and intermediate switch in this video we explain how four way intermediate switching works to connect a light fitting which is controlled with three or more light. Order is not important. 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. I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects.