Electrical outlets are likely among the most significant and overlooked devices in the common household. And, depending on where you are in the world, you may have a vastly different image pop in your ...

It is the bane of worldwide travel: there isn’t just one way to get AC power from the wall. The exact connector — and what you can expect when you plug in — differs from country to country. Even if ...

Spark plugs can come in various shapes and sizes because not all engines are the same. Depending on the engine type and ...

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 ...

close up of Type A plug prongs - Gabriel Lopez/Shutterstock 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 ...