After all, it's one thing for other countries to have different plug types, but why must American electrical systems use some ...

A lot of the power outlets around your house probably have three holes for a three prong outlet, but is it really safe to use a two prong plug in that outlet?

Now, let’s talk holes. Both two- and three-prong outlets have two parallel vertical openings:. The narrow opening on the right (i.e. the “hot” slot) provides access to the hot wire ...