Not exact matches
An added benefit of the stored
electrical energy is that any appliance with a three -
prong plug can be fitted into one of several 110 - volt, 20 - amp outlets housed in the vehicle.
Therefore, houses built before 1960 have two
prong outlets as opposed to modern
electrical outlets which are designed for three
prong plugs.
The two small holes found on the
prongs of most U.S.
electrical plugs are a safety feature — the holes make contact with small tension points inside the outlet to help hold the
plug in place.
These days most
electrical outlets that you see accept three
prong plugs.