I am working on prep for installing a microwave above our range. The range hood which will be removed has power but no ground. I traced the power source through the basement back up to a light switch in the kitchen. The way things are wired there have me confused. The previous owner had obviously done a lot of wiring on his own.
Power comes down from the ceiling to the switch with blk/red/wht. Blk/red going to the switch for the one light.
Up from the basement is blk/wht which fed the hood and an outlet near the sink. Wht/wht tied via wire nut. Blk/blk spliced goofy but functional.
I yanked out the blk/wht for the hood and outlet and will run a dedicated circuit through the basement for the microwave and gfci for the sink outlet.
This leaves me with the blk/red/wht in the box for the light. I reconnected the blk/red for the switch but what do I do with the white wire? Cap it with a wire nut? Not sure what it's there for.
Thanks for your input.