I feel little tingles from the rails when I'm working between two machines all the time, doesn't feel like very high voltage. But I'm not about to start fooling around with things like adding non-original grounding or changing plugs to 3-prong that were originally two. My place has grounded sockets if they do have three and those ground interruption thingees. I did get a 25,000 volt but extremely low amperage zinger while electronically restoring a 1960s color TV once and slammed my head into the top of the cabinet, learned my lesson on THAT one!