4 Way Switch Diagram. This 4 way switch diagram 2 shows the power source starting at the fixture. Watch the 4 way switch video below and pay attention.
Click here to access note. Keep in mind that each light switch will count as two wires when calculating your box fill. The first switch 3 way travelers brass color connect to one pair of the second switch 4 way travelers black or brass color.
Click here to access note.
If you understand how to wire a 3 way switch you ll have no issues with a 4 way switch. Look for 4 way switch wiring diagram or step how to wire a four way light switch electrical circuit a 4 way switch is a double pole double throw dpdt 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 4 way switch diagram 1 shows the power source starting at the left 3 way switch.
