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?

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 ...

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 ...

Read more: 12 Woodworking Tools Under $20 That Are Great For Beginners Although we've already settled why these holes exist in electrical plugs (and why some plugs don't have them), people have ...