Some outlets are installed upside down, but the three prongs still serve the same purpose.Other outlets — especially older ones — only have two slots and can only fit two-prong plugs. Some ...

The US uses two standard electrical plug types: Plug Type A and Plug Type B. Both have two parallel pins for power, while the latter has an additional grounding pin for safety. But if you look ...

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 ...