Answer / bruce

Because neutral is the return path for the load current but
earthing is used for protection against earth leakages.
Both are ground to earth but flow of current is
different.Neutral bus and earth bus are not interconnected
in network or distribution system.

Answer / kms

power is coming to our home via phase & neutral wires. in
case when the phase wire is in active & neutral from supply
system is disconnected then the power will flow via the
person in the house & a closed circuit will be formed by
him. To avoid that alternative neutral has been provided in
our homes. The above said neutral point will be earthed for
electrical safety.

Answer / k.prakashchandra

You have to consider ER of both electrodes ,the sum of which
will be about 10 Ohms.

Answer / pallab phukon

if we use earth as neutral ,it will not be possible to
measure the power consumed by the household or establishment
because there will be no returning path for the current
through the neutral which is grounded at the
transformer.power is delivered from the transformer ,so to
measure the power consumed there should be a closed path

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