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. A four way switch allows the traveller wire from one switch to travel through or criss cross between another switch.

Tutorial 3 Way Switches And 4 Way Switches
What is a 4 way switch. When the switch is operated current will either travel straight through or crisscross. 4 way switch wiring 4 way switches provide switching from three or more locations. For 4 way switch wiring you will need two 3 way switches one at each end and then as many 4 way switches as you want in between. 2 wire cable runs from the light to the first switch and then 3 wire is run between all the switches. Four way switches are used. Set your store to see local availability see similar items.
Note that in the above animation the wires are color coded to indicate their voltage state. A 4 way switch has 4 terminals or poles. 4 way switch not to be confused with a 2 pole switch. The center switch is 4 way switch while the outer two switches are 3 way. A dual pole switch is used primarily to turn one 240v circuit on and off much the same as a single pole switch is used to turn one 120v circuit on and off. Eaton 15 amp 120 volt277 volt standard grade 4 way decorator rocker switch with back push wire light almond model 7504la box.
The 4 way terminals are labeled in and out two of each. Another widely used switch is the three way switch. This page describes how to use 3 way and 4 way switches to control lights. For more than two switches one or more 4 way switches are added. For a discussion of how to wire such circuits see 3 way and 4 way light switches. If more than three switches are needed simply place more 4 way switches between the three way switches.
They do not have an onoff position like single pole switches. The 4 way is used when you want to control the light or lights from two or more locations. A 3 way switch is used on each end with one or more 4 way switches in between the two 3 way switches. At the light the black hot wire will pass right through going to the first switch. How 3 way and 4 way switch circuits work controlling a light with two or more switches. These are used in combinations of two.
Four way switches are used to control lighting from three or more locations. How a 4 way switch works switches to control lighting. Eaton aspire 15 amp back wirepush wire 4 way switch white satin model 9504ws 14 11 14 11. Two terminalpoles are labeled in and two are labeled out pairs of wires called travelers will connect to each side. 4 way switch configurations are used to control lights with three or more switches. Out of stock online.
A 4 way switch has four terminals do not confuse with and purchase a 2 pole switch by mistake. That page and its links also discuss proper wire colors and several wiring alternatives. Controlling a light with three or more switches. To find out which.