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 closely ...

Have you ever wondered what the holes in electrical prongs are for? Well, some knowledgeable experts have the answer. Type A and Type B electrical plugs are the two standard varieties used in the US.

Grade-school teacher Kim Hindery usually spends summer break relaxing while intermixing some time for professional development courses to prepare for the next school year. But Thursday saw the ...