Answer / johnringson

Below 1 ohm.

Answer / ramdarkmaster

Earth's resistance will differ from place to place....
it all depend's on soil resistivity... some places it may be red soil, were as in some places it may black cotton soil..
so we need to measure the resistance using earth tester..
but normally it will in few ohms.

Answer / mukesh kumar

Copper earthing should be below 1 and GI Earthing below 3.

Answer / rajesh pal

Value of earthing G.I should be minimun <3 ohm this value we can use for body earth any machine D.G ,Transformer any other
and copper earth value shoul be < 1 ohm it will bettor for Nutruel earth for D.G and transformer and also connect with isolation transformer and some medical machines MRI, CT scan,kottery machine OT and other machine which require.

i need mat lab program to find out the transmission line losses,regulation and losses

0 Answers   AITM,

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what is the ATS .And how it works.

0 Answers  

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why we are using the ac supply in domestic purpose, why don't use dc supply.

5 Answers  

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What is the main purpose of relay?

1 Answers  

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what is the knee point voltage in current transformer

2 Answers  

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how DC motor operating in detail .pls any one guide me .iam not clear idea about that .thank u

2 Answers  

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what is entropy?

3 Answers   NTPC,

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What are the voltages at which electrical energy is transmitted

7 Answers   KSEB,

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How much duration I can keep open the CT if it is under loading condition(100 Amp load)?

3 Answers   Infosys, NTPC, Suzlon,

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Why not connect relay Y phase for over current and earth fault

1 Answers   HB,

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300m long and 30kw inductive loade 3phase supply how many size cable required

0 Answers  

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what do you mean by lagging and leading current.explain in detail.

1 Answers  

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