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.

If you've ever stared at the holes in an electrical plug and wondered why they exist, you're not alone. Like an industrial-age kōan, the answer is anything but straightforward. A quick search will ...

Not all outlet holes are the same, and there's a reason for that. The shapes (vertical slots, round holes, T-slots, etc.) correspond to specific electrical functions and safety features. Take the ...