Four Way Switch Wiring Diagram. Keep in mind that each light switch will count as two wires when calculating your box fill. 4 way switch wiring diagrams national electrical code.
4 way switch wiring with light first. The 4 way is used when you want to control the light or lights from two or more locations. 4 way switch wiring diagrams national electrical code.
At the center box with a four way switch black and red from the first box goes to two terminals with the black and red going to the third box to the other 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. This diagram is a thumbnail. This diagram illustrates wiring for a 4 way circuit with the electrical source at the light fixture and the switches coming after.
