Even though it is not rquired, we run a ground to the receptacle with metal boxes, or else use self gounding receptacles, also not required/
We do not use those 38 cent receptacles. By using spec grade receptacles, I have cut down on call backs years later. I sleep better at night and being a rotund guy, and not likeing the bending down, I am not going back and reppacing tose cheapies ever. Just personal prefernce.