How To Wire 3 Switches. A three-way switch is built and wired a little. ALWAYS photograph switch wiring before removing old switch, so mapping to new switch is easier.
To wire these up, all you have to do is transfer the wiring from the CRL switch to the corresponding lugs of the other switch—it's like painting by numbers.
In a four-way switch configuration, three switches control a single fixture, whether it is a light, receptacle or other appliance.
Before you begin anything with a three-way, you must understand that in order for you to have a three-way circuit you must have three-way switches. Blue indicates a wire that is floating. "Floating" here means isolated from hot and neutral by switches and/or light bulbs. The hot source is spliced to the white wire (which should be marked as being hot with.
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