Hi, Problem yesterday in my basement shop. I dropped my arbor nut into my table saw cabinet. I opened the door and noticed a lot of chips. I disconnected my Delta d.c. hose to sweep up the chips and got a pretty good shock when I touched the cabinet. Figured it was static electricity, but it got me thinking of a potential explosion. Anyone else experience this? I have noticed when turning on my d.c. I get a very small shock. Everything is grounded and wired to code by an experienced electrician. Any thoughts are appreciated. Thanks John