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what is the need of third pin in a plug/

what is the need of third pin in a plug/

Grade:10

1 Answers

bhanuveer danduboyina
95 Points
11 years ago

The third pin in the plug is the Earth pin. It is connected to the Earth which has a low resistance. When a short circuit happens in the device, the excess current flows through the Earth, back to the source in a low resistance path and trips the breaker, or opens a fuse, thereby removing the load from the supply. 

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