Should the ground be up or down on an outlet?
Then, why are some electrical outlets installed upside down?
Because if a cord or wire were to fall down on a partially plugged in right-side up outlet you would short out between the hot and the neutral. When the outlet is "upside down" in the above situation the wire would touch ground first.
Beside above, how high off the ground should an outdoor electrical outlet be?
Required Outdoor Receptacle Locations Protection may be provided by a GFCI receptacle or a GFCI breaker. One receptacle is required at the front and rear of the house and at a maximum height of 6 feet 6 inches above grade (ground level).
The outlet should be oriented with the ground pin down because a person grabbing the outlet will have their index finger at the bottom side of the plug and the index finger sticks out further than the thumb. Having the ground down will keep a person's index finger from touching the live pins.