I've been planning this for a bit and have discovered I may be able to do this without the need to run additional wire, but I thought I'd check the wisdom of the interwebz first. I have a 1HP table saw that is currently running off my 20A 120V circuit that supplies all outlets and lights in my garage, so naturally my lights flicker when I start it up but otherwise it works fine. I've been looking at switching it to its own dedicated 240V circuit and have discovered a completely separate 120V line running to my attached garage. It appears to only power a single outlet on the wall, and two on the ceiling for some fluros that were added later. I can pull on the end near the panel and see movement in the garage (plus I've checked every other outlet in the house) so it seems to be a dedicated line (it's the one sticking out in the photo). I have just enough room in my main panel for a single two pole breaker (as seen below), so I believe I can use the existing 12/2 line for a 20A 240V outlet near my table saw. My plan is to mark the neutral black or red at each end, open up each outlet (3 total) along the daisy chain to remove the outlet plug and splice the line together, putting a blank faceplate back on, and run into a box where I end with a 240V female hookup. The research I've done indicates that 12 gauge is good for 20A, so does my setup sound alright? I'm wondering about the bare ground, can that be used in a 240V application?
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