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First of all, does this mean that the light is permanently on?

Basically what a switch does is interrupt the current flow going to the light. When you turn it on, it makes the connection that is already there with plain wire.

So, installing a switch involves finding the hot wire that goes to the light, cutting it, and connecting each end of the switch to each section of wire. YOU MUST DISCONNECT POWER BEFORE DOING THIS, OR YOU WILL ELECTROCUTE YOURSELF.

Also, completing a project like this in a manner that is up to code is quite a bit more complicated than my explanation. The code is there for your safety, following it is common sense. You must use an approved switch, in an approved box, mounted securely in an appropriate manner, etc. If you aren't completely sure you know what you're doing, don't do it.

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โˆ™ 2015-07-15 19:16:48
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Q: How do you wire a light switch to an existing light that does not have a switch?
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Can you connect a wall switch and a light fixture to an existing light fixture?

If the question is, can I wire a switch to an existing light fixture (and I must assume that it's something like a pull-chain light fixture), the answer is yes.If the question is, "how do I wire a switch to an existing light fixture that has no external switch", the answer is, "in series".The attached web site gives simple instructions on how to wire a basic light switch to an existing light.See sources and related links below

How do you hook up a light and switch from an existing light?

Your question implies that you want to wire a new branch circuit controlled by a switch using the existing light fixture. DON'T DO IT! It is a code violation. The existing light has a switch already. you cannot control another light with another switch when the first light is OFF. There are safety reasons for not doing this. If you wire the new light from the hot side of the existing light, you can be shocked even if the new switch is OFF.

How do you add another porch light to an existing switch?

Piggyback off the box for the existing light. Run a wire from the existing junction box to a new junction box (which is placed wherever you want the new fixture). Then, in the existing box, connect the wire coming from the switch, the wire for the existing fixture, and the wire for the new fixture together using wire nuts. Wire up the new fixture, and presto, you have two fixtures on a switch where there was only one before.

How do you power a new light off an existing switch?

If you want to control the new light off of the existing switch then connect a black wire from the new light's black wire to the existing light's black wire and the new's white to the existing lights white wire and grounds to grounds. Or if there is no existing light; connect the black wire from the new light to one terminal screw on the SINGLE POLE switch (but not the green grounding terminal) The other terminal on the switch is connected to a black, hot all the time, wire which is paired with a white neutral wire that will connect directly to the white wire on the light. Grounds to grounds. Use 14/2 with ground wire on 15 amp circuit breakers and 12/2wg wire on 20 breakers. For more about SINGLE POLE switch wiring see the attached link.

Single light switch you want to put in a double for your fan and light how do you do it?

You have to pull a new wire. There is no way to do it with the existing wire, at least no way you should do it and be in code.

How do you wire a new light switch from an existing outlet?

You need to take a new wire into the outlet and to your new switch box. Black (hot) to black and white (neutral) to white Also splice the ground wire through. In the switch box you'll have your new wire from the outlet and a wire going out to the new light. Incoming black wire to one terminal on the switch and the black wire going to the light on the other terminal. The neutral wires get spliced together.

How do you wire an additional light to another light with a switch?

The black and white wires that go to the switched light should be wired in parallel to your new light if possible. There should be wirenuts on the existing light making the connection to the light. There may also be a bare ground wire. Using the same size wire, likely 14 AWG, connect the new light wire to black, white and ground of existing light.

How do you wire in a pull chain switch in a bathroom light fixture?

If you are adding the pull chain to an existing fixture then the pull chain switch should have two wires. Wire nut either one to the hot wire coming in and the other to the black wire of the fixture.

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.

Can you change a light switch to toggle switch outlet?

You can if you have a neutral wire present. If the existing switch is what is called a "switch loop" then you can not change the existing switch to a switched outlet. You can identify a switch loop by looking at the wires coming into the switch bow. If there are only one set of wires usually a black and white and they go directly to the switch then you have a switch loop

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