Answer / divyesh

to give low resistance and if one earth is out of
order,second will do the required work of earthing the equipment

Answer / bilal mir

Double earthing is
used to give
minimum
resistance to the
flow of whole
current of the
apparatus in case
of short circuit or
leakage or any
such other fault.

Answer / dinakaran

for safty purpose only. if one is failure another in line

Answer / pravin

1.For safety of personnel & equipment
2.Reduces voltage fluctuation in case of excess current flow.
3.In case non use of tripping devices it reduces the risk of electrocution.

Answer / sohaib ahamad

to give low resistance and if one earth is out of
order,second will do the required work of earthing the equipment

Answer / himanshu saini

For safety purpose,if any short circuit in line or excess current flow in line and single earthing not proper working then double wire earthing pass that current and tripped the MCB of welding machine

Answer / prabakaran

Earth1 value=1ohm earth2 valu=1ohm
Parallel resistance formula =r1+r2/r1×r2 so answer=1/2 so earth value reduse so better to current flow on ground

please describe the Transformer setting, Motor setting, I/C setting, Tie setting

0 Answers  

What is the minimum distance between taransformer (say 2000 kva)and its earth pit?

2 Answers   Bhel,

Which Programming software are use for Allen bradley PLC's?

16 Answers   ADC,

although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?

0 Answers  

why neutral can not used in three phase motor connection?

1 Answers   HSL,

Who is reputed manufacturer of TNC switch for ACB in India ?

3 Answers  

why on axial hitting up of air blast on hydrogen produced in oil circuit breaker,temperature rises of the core of the arc?

0 Answers  

difference b/w semiconductor and dielectric

2 Answers  

Will a bulb glow if we connect it between the phase and earth instead of earthed neutral?

3 Answers  

75kw drive operated motor current fluctuation from(85-130)ampere.current setting in drive is 130amp.sometimes motor trip when current limit cross 130amps.I change the drive. still current fluctuate between 80-130amps but in this time motor not trip,current setting in drive is 130amps.where is the problem?

1 Answers  

How to know the back up time for a 5KVA UPS which is connected to 15 nos. of computers? Is there any formula for this? pls. tell me.

1 Answers   HAL,

What types of testing in 11Kv Ht switchgeat during testing?

3 Answers   TCE,