3 with the 15 major types of electric powered plugs in use worldwide. Letters are assigned through the U.S. Department of Commerce and they are for identification only. Worldstandards.eu, CC BY-ND To understand why electric powered shops aren’t all the same, you have to know how a plug operates. But https://typesofelectricalplugsuse19517.eedblog.com/29427874/the-basic-principles-of-types-of-electrical-plugs-uk