How To Wire A Light Switch With 3 Wires. You can connect any number of switches, but There are only two travellers between the switches. In North American residential wiring, you need three wires to connect multiple switches to a light.
What is Two Way Switching ? Most smart light switches require a ground wire, an "in" wire, an "out" wire, and a neutral wire. Each cable has a black insulated wire One of the black wires will bring power to the switch, the other will energize the light fixture; this is commonly referred to as, power in and power out.
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.
The light gets hit by power first, then the single pole switch, and lastly the receptacle.
How to Wire a Single Switch. The hot source is spliced to the white wire (which should be marked as being hot with. So when I put the new switches with the Red wires in the box, what do I do with the Red wires?