The 4-way switch
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152 views • September 26, 2023

Here I have added a 4-way switch to our two 3-way switches to see what happens.

3-way has 4 combinations BUT adding a 4-way switch doubles that to 8 combinations!

It is still easily connected though.

Notice that the state of the light is 1st determined by the two 3-way switches and the purpose of the 4-way only inverts the light status. (if it is off then turn it on and if it is on then turn it off.

Note also that any number of 4-ways can be added and will continue to work properly.

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