BS 546 (5 A)

Type D plug and socket

The old British 5 A three-pin, still standard in India. Used in 33 countries.

Type D socket face
Pins
3 round pins, 5.08 mm, in a triangle
Rating
5 A / 250 V
Earth
Earthed
Standard
BS 546 (5 A)

What Type D looks like in use

Type D is the pre-war British three-pin standard, superseded in the UK by Type G in 1947 but never retired in India and its neighbours, where it is still the domestic norm.

It is rated at 5 A — enough for lights, fans and small appliances, but not for air conditioners or water heaters, which usually use the larger 15 A Type M.

Older installations often combine the two: a single “universal” socket face with round holes that accepts D, M and sometimes C plugs.

Watch out: Type D sockets accept Type D plugs. Indian sockets often also take Type M, and many accept Type C loosely — which is convenient but not earthed.

Countries using Type D

33 countries in total

Other plug types

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