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How do you hook up a light and switch from an existing light?
Add a light to switch from a different circuitI 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.
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.
How do you wire a 4way switch?
Connect all white wires together under a wire nut and push them back into the box. Connect all ground wires together and then connect them with a jumper wire to the ground screw on the switch. Connect black power in and power out, if applicable, wires to the bottom screw on the switch. Connect the remaining black wire going to the light to the top screw on the switch.
How do you control 2 lamps with two way switch?
A 3way switch at each location is what you use, but it must be wired properly to work. You must have incoming power at one switch location and no power at the other location. The other location has the wire going up to the light. You then need a 3 conducted wire such as 12/3 or 14/3 running between the switches. Use the same size wire you used to power the switch and top up to the light. You then connect the black power wire at one location to the black screw on the switch, and at the other location you connect the black wire going to the light to the black screw on that switch. At each location tie the whites together under a wire nut and shove that back in the box. Tie the grounds together and connect that to the ground screw at each switch. At each location you will now have the black and red wire from the wire you ran between the switches left. Those are called travelers. Connect those wires to the remaining 2 screws left on the switches at each location. Does not mater which you connect to which screw. Assuming no other wires are involved this is how you wire it.
How do you wire a light to a switch at the end of a run and which controls an outlet?
Bring power into the light switch box 12/2 or 14/2 wire depending on the existing wire. Make sure you use the exactly same size wire that is used on that circuit. If you do not know look at the breaker in the main panel that controls power to that circuit. 20 amp will be 12/2 wire and 15 amp will be 14/2 wire. Now run another wire from the switch box out to the outlet. Inside the switch box, strip both white wires back 3/4" and connect them together under a wire nut and push this back into the box. Connect the 2 ground wires together and then connect that to the ground screw on the switch. You now have 2 black wires left. Connect them to the 2 screws on the light switch. Does not matter which black wire you connect to which screw. At the outlet connect the ground wire to the green ground screw, black wire to copper screw, and white wire to silver screw. That outlet will now be controlled by the light switch.
