I am installing a new exhaust fan with 2 lights. The box where the switch goes, has a 2 wire and ground coming in to it. The black is hot. When the light would be turned on both the black and white became hot so the white was my return. I am installing a 3 toggle switch in its place. Can I just use the wires there or do I need to run new wires from a power source. I am confused. I am thinking I need to run anew line, but don’t get it. Why can’t I use the wires in the box? The diagram for the switch shows a black hot coming in and then 3 blacks going out to the fixture. Then it shows white coming back as a return. Where do I hook that up? The existing white? Or no. I’m confused about that part. Yes there is a ground.
here is the picture of the old light fixture and box.
once the power comes into the switch box I plan to run into three toggle switch. I am running new wires from the box to the exhaust fan and lights
Best Answer
The choice is yours to make based on how much control you want.
Do you need to control the lights separately from the fan?
(do you mind if the fan comes on every time the lights come on?)
If no:
Just wire all the black wires to your existing black wire, the whites to white, and the ground to green and you are done!
If yes:
You'll need to run another wire.
If you decide you need to run another wire you need to ask your self
Do you need to control the lights independently from one another?
If yes:
Then you'll need to run 14/4 wire and 2 more switches. (instructions below)
If no:
Then you can use the 14/3 you bought, but will need an extra switch.
Instruction for connecting new wire: