I want to put a three prong cord on this but read somewhere that if you ground this it will short out . What do you think ? This is what I read . "Ooops! I just looked at that schematic. It's set up almost like an AC/DC amp, with one conductor of the mains line hooked to the chassis. You CAN'T ground that. You'd get an intense blue flash and pop when you plugged it in, then your circuit breaker would trip and your lights would go out. The only way to run that completely without risk of shock is to plug it into an isolation transformer. However, you can make it a lot safer by replacing the cord with a polarized two-prong one arranged so that the neutral wire of the socket is always connected to the chassis. As long as somebody didn't wire a socket backwards, you're OK with that.