Answer / melinbalan

normally speaking, earth and neutral is having the common
point at generating stations.

But neutral is treated as the "return" path of the supply.
But when we are transferring supply to a long distance , it
needs 4 conductors, 3 for phase and the last one for
neuatral(return).So it is getting expensive ,
so normally we are earthed at the generating stations and
only taking 3 condutors till it reach the i/p of the
Distribution transformer(i/p is delta) and from the
secondary(star) we are starting neutral(altogether 4 wires).
And this neutral is earthed there.

The earth is also used for protection.

Answer / laiju j nair

it s a frequently asking interview question..
earth is defined as the protective circuit .
and neutral s defined as the current returning circuit.
in home,
ground wires are connected to all electrical equipments
metal body. if there s any fault in equipment , it may
cause current on its body. earth wire connected to metal
body carries this fault current to earth and decreasing the
effect of shock. for this , the earthing should be perfect.

AC is sine wave, ie voltages become zero in each cycles.
this zero voltage is referred as neutral. in 3 phase
transmission system, the voltage disbalance between lines
may leads to flow some current through neutral. due to this
reason neutral s earthed in all substations.. thank u..

Answer / bala

Neutral: Return path of current flow in order to make a
closed circuit.

Earth: path for Leakage current in the circuit

Answer / sprabhu

The Earth Cab act as a netural But a netural Cannot act as
an earth

Answer / rajendran.m

Earth is a surging point.
Neutral is a returan bath of circuit.

Answer / rajendran.m

Earth is surging point of equipments,and prodection of
human body from short ckt of the equipments.

Neutral is return bath of equipments( prodection of
equipments)

Answer / lionking

neutral is a reference point and a return path for any
"live" circuit. Earth is an energy ZERO point.

When ALL phase has balanced load, neutral should be ZERO
volt in respect to earth. Becareful the word "balanced",
which means, when there is an unbalanced phased (due to load
or otherwise), the neutral will no longer be ZERO volt in
respect to earth. When there is more than ZERO volt between
neutral and earth, then there will be current flow through
these 2 points (leakage).

Even for most of the time, neutral and earth has ZERO volt
between them; they should never be connected together or be
used interchangeably.

Answer / w. vijay

Neutral:- It is return path conductor.
Earthing:-It is the connection of the conductor to the
general mass of the earth.

Neutral:- It provides return path to current to complete the
circuit.
Earthing:- It provides the path to short circuit/ fault current.

Neutral:- Advantage: for system reliability and voltage
stability.
Earthing:- Advantage: for the protection of human being and
equipment

Answer / manoj kumar tiwari

earth is always act as zero potential ,but neutral may be
or may not b at zero potential

Answer / mohanraj .c

first of all we should clear in the terms of earth and
neutral. earth is always zero potential and neutral is the
reference point of a.c system.i.e neutral is also in the
zero potential but not always.
two types of earthing is available
1. neutral earthing
2.equipment earthing

neutral earthing is used for equipment safety and equipment
earthing is used for human safety.(body of the equipment is
connected to earth.so during fault time, the fault current
flows through this)

so earthing is only for safety purpose.
but neutral is a returning path to an alternating current.

why ac supply neutral should earth not in dc (-)

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