Wiring A 3 Way Light Switch With 2 Lights. Three-way light switches control a light from two locations, such as from both ends of a staircase or hallway. Three-way switches allow for controlling a light fixture from two separate locations, these are usually used at the top and bottom of a flight of stairs or at two different entrances to a room.
In North American residential wiring, you need three wires to connect multiple switches to a light.
It's important to recognize that a light switch is designed to interrupt the "hot" wire when it's turned off.
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How to wire switches with no neutral wire Power enters at light fixture There are no white wires covered with wire nut and pushed to back of box. One is for ground, one is our common terminal and the other ceiling box and into the light fitting. One of your electrical boxes might have just one bundle of wires while the other is packed with three bundles.