For general house wiring. As I understand it, the ground will carry away harmful power when there is a fault in the neutral lets say a wall outlet that has a load plugged into it. What keeps power from going to ground normally? Is the ground only available when a load is plugged into the wall outlet thus adding the ground to complete a mini circuit within the load? If so, why doesn't current just flow to ground initially rather than only to neutral; why no power to both paths in such cases as well? Thanks in advance.