Chomegacontrol power source - I put my hand on the back and got a good shock, or at least a steady Ziiiing. Good grief, I wonder how long it's been without a ground. It looks pay-back from my cave-man electrical system (ancient post-n-cable). It's an isolated circuit originally for the cistern pump near where the darkroom is now. All the darkroom goes to the one circuit through a power strip. Doesn't appear to be too much of a load for the 20amp fuse. Never blew. Can I just add a ground? Maybe a wire to the main water line coming in? Or is this another case where Johnnie (that's moi) is being stupid? Thought I'd better ask before they punch my frequent-fryer card at the emergency room again.