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Current needs a return path to earth to flow. The neutral carries this flow. Therefore, no neutral and no current flow.

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Current needs a return path to earth to flow. The neutral carries this flow. Therefore, no neutral and no current flow.

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As i know,neutral is the return path of current & ground is for any leakage current

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Current on neutral in a multi phase system is caused by imbalance between the phases.

Question: Are you talking about neutral or ground? The two are very different. Although neutral is grounded, it is expected to be a current carrying conductor, so current on neutral is normal, so to speak. Ground, on the other hand is a protective circuit that is not supposed to have any current on it at all.

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If there is a GFCI in the circuit it will stop working correctly. They compare ground current to neutral current to detect a fault. It makes ground current equal to neutral current which is a fault condition.

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if it is balanced then neutral current is zero (!,e iR=iY=iB).

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For both a balanced and an unbalanced load, the neutral current will be the phasor sum of the line currents.

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