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Question
what is the difference between earth and neutral?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
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.
 
Is This Answer Correct ?    222 Yes 33 No
Melinbalan
 
Answer
# 2
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..
 
Is This Answer Correct ?    126 Yes 9 No
Laiju J Nair
 
 
 
Answer
# 3
The Earth Cab act as a netural But a netural Cannot act as
an earth
 
Is This Answer Correct ?    116 Yes 43 No
Sprabhu
 
Answer
# 4
Neutral: Return path of current flow in order to make a
closed circuit.

Earth: path for Leakage current in the circuit
 
Is This Answer Correct ?    77 Yes 7 No
Bala
 
Answer
# 5
Earth is a surging point.
Neutral is a returan bath of circuit.
 
Is This Answer Correct ?    72 Yes 24 No
Rajendran.m
 
Answer
# 6
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)
 
Is This Answer Correct ?    58 Yes 22 No
Rajendran.m
 
Answer
# 7
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.
 
Is This Answer Correct ?    32 Yes 1 No
Lionking
 
Answer
# 8
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
 
Is This Answer Correct ?    24 Yes 1 No
W. Vijay
 
Answer
# 9
earth is always act as zero potential ,but neutral may be
or may not b at zero potential
 
Is This Answer Correct ?    33 Yes 11 No
Manoj Kumar Tiwari
 
Answer
# 10
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.
 
Is This Answer Correct ?    23 Yes 3 No
Mohanraj .c
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
what are the different functions of mccb, rccb / elccb ?   2
lightning current is ac or dc..?????   6
Why we call cable rating in SQ.mm.If it is 240 SQ.mm how much the diameter possible?is there any calculation ?   4
why we use 25 kv in railway .not 11kv, or 33 kv Isro 1
what are difference between indoor and out door substation   1
what will be fault level of 11 KV , 2000 A ELECTRICAL SYSTEM?   4
In APFC panel, Why on dealy timer is used in Capacitor controlling circuit?   1
Due to ferranti effect which power increases at the receiving end?active power or reactive power?   5
WHAT IS REACTIVE POWER?   2
why vaccum circuit breakers are preferred over m.o.c.b   2
There is 3phase power cable from 1 point to the other point which is 100m away. Two point equipped with power meter and recorded 1st point is 205kW while the 2nd is 202kW and each phase average carry 400amps. To calculate the resistance of the 3phase power cable, is the formula using will be P=I2R?   3
How does a star connection and delta connection work? How does the star connection save starting current and how does it change to delta?   2
 
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