Ok, so here's an easy question.
I'm installing the outlets in my new house. I know that the code does not specify the orientation of the ground slot (up or down), however, Ray Mullen's residential wiring guide suggests the ground in the up position is superior. His reasoning is that if you have a metal cover plate and it comes loose, kit will hit the ground and not a hot prong. Yet, every house I look at has the outlets installed with the ground slot on the bottom.