How To Wire A Light Switch With Red Black And White Wires

A single pole single throw switch such as a light.

How to wire a light switch with red black and white wires. Here is our video on how to wire a 3 way light switch. This type of switch lets you turn the light off or on from more than one place in the room. And when he hooked up his new light fixture he did what i would expect the majority of homeowners to do he connected the white wire on the fixture to the white wires in the box. However a black wire can never be used as a neutral or ground wire or for any purpose other than.

A three way switch is different. White wires augmented with red or black tape or markings are used as hot. The main wire that will go from one switch to the other should have 4 wires total black white ground and red. The most common home wiring uses non metallic sheathed cable with three wires in it.

In existing 3 way wiring this wire toggles hot between two. The hot wire from the breaker usually black neutral. Remember black and red wires are always hot meaning they are source wires that carry power from the electric service panel to a destination such as an outlet or a light. If it doesn t work switch the lower wires.

Test the wires in the ceiling box with a voltage tester. The hot wire in a 120 volt residential ac circuit usually is coated with black insulation while the return or neutral wire is white. It should be identical to the measurement when you touch the ends of the black and white wires with the voltage tester. This is a typical wiring setup for a 3 way light switch with black white red and ground wires.

The ground wire also connects to the switch but the white wire gets spliced to the circuit neutral wire and bypasses the switch. Some sheathed cable includes a fourth red wire which makes it useful for wiring. If there is an extra red wire you should get a reading of 120 volts when you touch the terminals of the tester to the red and white wires. The wire that will be hot when the circuit is completed to your light usually black traveler.

You can t always rely upon the color of the insulation to guarantee what a wire actually does but there is often a general convention as follows. How to wire an outlet with red black and white wires before you make any wire connections to the outlet you must break or remove the bonding plate between the two brass terminals. A friend was replacing a light fixture in his bathroom and ran into something confusing a red wire in the electrical box along with the usual black and white wires. Black white and bare.

Review the diagram below for basic three way wiring instructions.