Blossary – International plug types

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There are 15 types of electrical outlet plugs in use today, each of which has been assigned a letter by the U.S. Department of Commerce International Trade Administration (ITA), starting with A and moving through the alphabet. These letters are completely arbitrary: they don’t actually mandate anything.

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Type E

French standard NF C 61-314 "Plugs and socket-outlets for household and similar purposes" defines a round plug with two round pins measuring 4.8 by 19 mm , spaced 19 mm apart and with a ...

Type D

The plugs have three round pins arranged in a triangle, with an earthing pin. The plugs are polarized and unfused. Plugs are non-interchangeable between current ratings. Introduced in 1934, the BS ...

Type C

This two-pin plug, rated at 2.5 A, is popularly known as the Europlug. The plug is unearthed and has two round 4 mm (0.157 in) pins, which usually converge slightly towards their free ends. It is not ...

Type B

The NEMA 5-15 plug has two flat parallel blades like NEMA 1-15, but also adds a ground (earth) pin.It is rated 15 A at 125 volts. The ground pin is longer than the line and neutral blades, so the ...

Type A

This type is mainly used in USA,Canada,Mexico and Japan.The plug has two parallel blades. Early versions were not polarized, but almost all plugs are polarized today via a taller neutral blade on the ...