If you want to add your own power cord, I suggest the 'power tool replacement cords' sold at Home De POT in the extension cord section. They are grounded, have a SAFE plug at one end, and 3 wires (hot, neutral, ground) at the other. Don't forget your wire nuts! That is the only SAFE way to join two wires together and protect them from touching, shorting, coming undone, etc. later.