Quote Originally Posted by Mark Bolton View Post
I would be more apt to blame your buddies doing his own wiring or some other event as opposed to the circuits being energized when he wasn't there. Tools, or proper wiring, don't burn shops down.

If there's something in the circuit that's going to catch fire if left on you've got far greater problems than any switch will protect you from.
Fire Inspector said it was the start capacitor in his belt sander. Professional shop. Professionally wired by an electrician. Fire inspector recommended kill switch for tools when away from the shop. But he's just the fire inspector. What does he know?

Swapped out the tandem for a regular double pole and all is well. Not rocket science. I have a buddy who's an electrician. We wired my basement together a few years ago. I'll have him double check what I did.