Power from light fixture to light switch. First of all we need to go over a little basic terminology on switches.
Wiring A 4 Way Switch
4 way light switch wiring. Two terminalpoles are labeled in and two are labeled out pairs of wires called travelers will connect to each side. Wiring a 4 way switch with light at the end in this basic 4 way light circuit 3 wire cable runs between all the switches and 2 wire cable runs from the last switch to the light. 4 way switch wiring 4 way switches provide switching from three or more locations. Wiring a 4 way switch is simply adding a switch to an already existing 3 way switch circuit. A 4 way switch has 4 terminals or poles. A 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch.
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. The electrical source is at the first 3 way switch and the hot wire connects to the common there. Do you need a 3 way switch wiring diagram. I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects. If more than three switches are needed simply place more 4 way switches between the three way switches. When the switch is operated current will either travel straight through or crisscross.
This allows you to control a load from other locations in addition to the 2 locations that a 3 way circuit provides.