3 Wire Switch Wiring

3 Wire Switch Wiring. The colors will vary depending on whether NM cable or conduit was used. 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.

Video on how to wire a three way switch (Sadie Davidson)

These are commonly used for lighting in a stairway where you want a switch on each floor entering the stairway. 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. All those switches, terminals and wires can confuse experienced electricians, let alone novice DIYers.

One three-wire bundle will have two colored wires (black, white) plus one of bare copper.

These methods are used by Construction Electricians in houses and buildings throughout the US.

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The white wire of the cable wiring is marked with black electrical tape, and is going to the switch. Three-way switches are always used in pairs. Follow Dominick as he shows you step by step how to get it right.