Type D electrical plugs consist of three round pins that form a triangular arrangement. The central earthing pin is 20.6 mm long and 7.06 mm in diameter, while the hot and neutral pins are 14.9 mm long, 5.08 mm in diameter, and spaced 19.1 mm apart.
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A Type C plug / adapter can also be used with Type D sockets. The universal receptacle of the adapter accepts plugs from devices of every country of the world.
Plug type C is the plug which has two round pins and plug type F is the plug which has two round pins with two earth clips on the side. Germany operates on a 230V supply voltage and 50Hz.