Electrical cords and power outlets have changed a lot over the years, but they've always had holes in the prongs. But do the ...

Electrical plugs and outlets come in many different shapes and sizes. Why do the holes in electrical outlets have such ...

If you live in the U.S., you’re almost definitely familiar with the holes in the prongs of electrical plugs. Many, if not most, American plugs have them. So what exactly are they for?

Curious about the T-shaped hole in some electrical outlets? Learn what it means, what plugs it supports, and why it’s used in ...

Credit: Electrical Safety Foundation International Now, let’s talk holes ... When you plug a device with two prongs into an outlet, power flows from your home’s electrical panel through ...