How do you wire a light switch?

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โˆ™ 2007-05-07 15:27:42

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A light switch breaks one half of the circuit to the light. "CODE" says to break the black wire. I usually break the white since this is the ground and should have less chance of a shock from a bad switch. Since it is only half the circuit if you are replacing a switch it does not matter which wire goes to which terminal on the switch. This applies to a single pole switch. A double or triple switch is something else. If a light that turn on from only one place is a single. If it turns on from 2 places, two doorways into a room or top and bottom of stairs it is a two way switch and it does matter how it is wired. Nothing will blow up, it simply will not work from both if wired wrong.

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โˆ™ 2007-05-07 15:27:42
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Q: How do you wire a light switch?
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How do you wire a light and switch with the 2 wire old romex?

with a standard 1 pole light switch (one switch operating the light) it is black wire to black wire and white to white (non grounded)

How do you connect a switch where the power is at the light?

Run a wire from the light to the switch. At the light connect the black power wire to the black wire to the switch. Not wrap some black electric tape at each end of the white wire going to the switch (This indicates that the wire is potentially hot and not a common wire). At the switch connect the black wire to one side of the switch and the taped wire to the other side of the switch. Connect the ground (bare) wire to the green screw on the switch. Now at the light connect the taped white wire to the black wire feeding the light and connect all grounds together with a wirenut.

When a light switch is turned on what travels through the wire?

Current flows through a wire when a light switch is turned on.

How do you wire three can lights to one switch?

Send power from the switch to the first can light. Then send a wire from that can light to the next can light and then to the last can light.

How do you wire a two way light switch to a single way light switch?

You can't. You will need a 3way switch at each end with 12/3 or 14/3 wire run between them. Power at one switch and light wire at the other switch.

How do I wire one switch to control two lights with the power coming into light?

Using 14/2 or 12/2 wire, black, white and bare. Bring the hot/black wire in the light down to the switch on the black wire, through the switch and back to the light on the white wire. Connect the white wire in the power wire to the white wire in the light. Connect the white power wire from the switch to the black wire in the light. Run the black and white wires in the first light to the second light. You should wrap the white power wire from the switch with black electrical tape to cover the white so that the next person realizes it is a power wire.

Light switch has 4 wire colors red and white and green and black which is the hot wire?

You have a 3 way switch. Your black wire is the hot wire. Your green wire is the ground wire. Your red and white wires go to the light and other switch. You should have gotten a wiring diagram with your switch.

How do you wire an outdoor light to a light switch?

All a switch does is separate the hot side of a voltage source from the light. This means you put the switch "in series" with the black wire going to the light fixture. The black wire from supply goes into one terminal of the switch and the black wire going to the light goes on the other terminal. The switch is grounded with the bare wire from supply and the white wires coming from supply and going to light are connected with a wirenut. The bare wire grounds are also connected with a wirenut.

How do you tell which wire is the switch wire when fitting new light?

You always switch the HOT side of the light, never the neutral. This would be the black wire from your voltage source.

How do you wire 2 light to the same switch?

by a parellal current switch.

How do you add a switch to a light fixture?

Install the switch in the wall outlet box you have installed. Now run a 12/2 or 14/2 wire from the switch to the light fixture in the ceiling. Run the exact same size wire that is already powering the light. Connect the ground wire coming from the light switch to the ground wires in the ceiling box. At the light in the ceiling cut the black wire powering the light. Cut only that wire. Now strip the 2 black wires back and connect the white wire coming from the wall switch to one of the black wires and the black wire coming from the wall switch to the other black wire. At the wall switch connect the ground wire to the ground screw on the single pole switch. Now connect the white and black wire to either screw. Does not matter which one. Now when you turn the switch off you are breaking the flow of electricity to the light. This is called a switch leg.

How do you install a dimmer to a light installed with W wire B wire and ground W running into the switch box if the switch box has power from B wire W wire and ground?

If you have one wire into your switch box for your light. this is called a switch leg, the dimmer should be wired across the black and white wire wires.

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