Why the third pin of a 3 pin plug is longer and thicker?

All pins are of same size.

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It is for protection purpose.

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It is for designing purpose.

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It is for reducing the current consumed

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Solution

The correct option is B
It is for protection purpose.

The longer and thicker pin in a 3 pin plug is for protection purposes. In case of any earth fault, heavy current flows through the thicker pin without overheating or burning the plug.
It is made thick to avoid inserting it into the live wire socket by mistake. Also, it is made long to ensure that it is always connected prior to the connection of live wire.

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Similar questions

In a three-pin plug, the pin made longer and thicker than the other two pins is

The diagram is Fig. 9.26 shown a three pin plug. Label the three pins.

(a) Why is the top pin thicker and longer than the other two ?

(b) Why are the pins splitted at the ends ?

Why is the earth pin thicker and longer than the live and the neutral pins?

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