Looking Good 3 Way Switch With 4 Wires

See tables 314 16 a b.

3 way switch with 4 wires. Each pair of traveler terminals should be wired to the traveler wires from one of the 3 way switches in the circuit. A 4 way switch must be wired between two 3 way switches as shown in the diagrams on this page. I ve pretty well gotten the hang of adapting the old wiring and making it meet code whenever i find something that isn t quite right but i don t know what i m looking at in this situation.

3 way switch wiring diagram 4 wires. They all must be between the two 3 way switches. 3 and 4 way switches are used to control one or more lights or fixtures from 2 or 3 switch locations such as the top and bottom of a flight of stairs.

One ground and 4 circuit terminals divided into two matching pairs called travelers. 4 way switch wring diagram. Two wire cable runs from the light to sw1 and 3 wire cable runs between sw1 and sw2.

The den has a 3 way switch setup for the main lights. The travelers from one 3 way can be wired to either terminal in a pair but don t mix up the pairs on the 4 way or the circuit won t work properly. If there are no neutral wires present you may need to run additional wires.

It s likely you ll also need to replace the existing switch box with a larger one to accommodate the extra wires for the 3 way switch. In doing so we will learn how to wire a 3 way switch as well. Turn off the correct circuit at your electrical panel.

A minimum of 24 cubic inches is required if 14 wire is used. I ve spent probably about an hour googling this and i m still not sure what to do. Confirm that each gang box contains a neutral wire typically white.