Hi hello, I am not looking to install this exit sign for actual commercial use, this is solely because I like exit signs and want to put one in my house. It is only residential, it does not need to be there. I was wondering, my sign has a neutral, positive and negative power wire. Could I take a regular three pronged extension cord (this is North America, not the UK) and cut off the end, strip it, and connect the two power cords and the grounding wire, then plug it into the wall? Thanks!