2. What is earthing?
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Answer:
used for electric material.its the third wire .when voltage will increase more than 220v it will go through 3rd wire.
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Explanation:
The principle of earthing is to consider the general mass of earth as a reference (zero) potential. Thus, everything connected directly to it will be at this zero potential. The purpose of the earth electrode is to connect to the general mass of earth ,
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