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Add a light to switch from a different circuit

I think here your concern is that you don't want change the performance of the circuit to which you add the light.

so you have to use a relay or a solid state relay to the circuit and a separate power supply to the light in compliance with all the safety rules.

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14y ago
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11y ago

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.

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12y ago

connect black to black wire, connect white to white, and green wire to bracket that came with light,and to bare copper wire that should already be in light junction box.

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Q: How do you hook up a light and switch from an existing light?
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Do you need to hook up a load wire?

The load is essentially what consumes electrons. For example a load on a light circuit would be a bulb. Therefore, if you don't hook up a load you aren't doing anything. It is like turning on a light switch without a bulb. It may give you some minor exercise, but it doesn't do anything useful.


Can a three way switch be changed to a single pole switch with a plate over one of the switch locations?

Yes, If you only hook up two wire it will work as a single pole


Im adding a new ceiling fan in my living room i pulled the old fixture down i noticed 2 sets of 3 wire BWR and 1 set 2 wire BW BW going to the wall switch how should you wire in the fan?

White is for neutral on the fan, black is power for the motor, and red is power for the light. If the power from the switch only has two wires (black and white), you would hook up white to white and hook black and red from the fan to the black wire from the wall switch. This means that you'll be powering the fan and light on the same switch and to change the fan and light separately you will have to pull on the chains or use a remote control.


How do you hook up two ways switch to three ways?

Your 2 switches will have 3 terminals each. One will be copper colored and two black. You will require a 12-3 WG wire between the switches. The Travelers: The black terminals will be connected together one from switch a to switch b and the other from switch a to switch b, it does not matter which black terms you choose to go from switch a to b The brass terminals one will go to the light switch a and the other to a power source switch b.


How do you hook up one light to one switch in a basement lighting system that has all 10 lights connected to one switch?

If you have good access to the wiring this is relatively easy to do. Each of the 10 lights is connected to another in parallel in a "daisy chain" fashion. Light 1 is connected to the switch, light 2 is connected to light 1, light 3 is connected to light 2 and so forth. Let's say it is light 5 that you wish to switch separately. You can first install the new switch by either adding a new box or modifying old switch box. There are two gang switches that will fit the form factor of a single switch. TURN OFF THE POWER TO SWITCH BOX. Using the same supply input at original switch, add a new black wire to the wire nut for input to original switch and connect this to the input of new switch. Then run a new wire to light 5 and connect black wire to the output of new switch. Connect all the white wires together in switch box and separately connect all bare wires together in switch box. Now at light 5 undo the black and white wire coming from the fixture, and reconnect the wire nuts so that there is a direct connection between light 4 and light 6. Do the same for the ground if present (bare wire). You now have the fixture wires hanging free. Now connect the black wire from new switch to the fixture black wire and white to white and you are done.

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