With conventional wiring the common wire from one switch connects to line the common wire from the other switch connects to the load lights. Now discussing 3 way light switch wiring diagram as also discussed above the color codes of the wires as having three insulated conductors as black as hot red as switch wire or called traveler and white as common wire as also shown when light is connected to both black and white wires.
Multiway Switching Wikipedia
Three way light switch schematic. 3 way switch schematic wiring diagram. 3 way switches have three terminals one common usually black color and one pair of travelers usually brass color. All of the switches shown below are 3 way. Basic 3 way switch diagram how to wire 3 way light switch step by step. With these diagrams below it will take the guess work out of wiring. Take a closer look at a 3 way switch wiring diagram.
Below is a simple schematic diagram that can be applied to all three way electrical light switch connections. Interested in a 4 way switch wiring diagram. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. This might seem intimidating but it does not have to be. Two very old three way switches. Turn the power off at circuit breaker.
This 3 way light switch diagram shows connections when the power comes into the first switch on to the second switch and then on to two or more lights switched by the 3 way circuit. This is only a wiring schematic and not the actual wiring method used for 3 way switch installations. The first step in any electrical project is to make sure there is no power going to the circuit you plan to be working on.