Answer Posted / ajay patel

In case of SIngle Phase System Neutral will carry current
of same magnituge as phase current.

In case of 3 Phase, Star Connected System, neutral will
carry current only during unbalanced or Phase to Neutral
fault condition. During balanced condition current through
neutral is zero(Ia+Ib+Ic=0). In case of Unbalance load
Neutral Current can be maximum as phase current. & In case
of Phase to Neutral Fault Magnitude of neutral current will
be same as fault current. In case of Phase to Earth Fault,
neutral current will be 0. Earth current is suppose to pass
through Earthing grid or Armoure of cable.

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