Three from the fifteen main types of electric plugs in use world wide. Letters are assigned with the U.S. Division of Commerce and are for identification only. Worldstandards.eu, CC BY-ND To realize why electric powered shops aren’t all precisely the same, you need to know how a plug will work. https://types-of-electrical-plugs86294.win-blog.com/9377360/the-ultimate-guide-to-different-types-of-male-electrical-plugs