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saraswata1981
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Earth Conductor Sizing as Per IS 3043

06/18/2013 3:17 AM

The earth fault current dissipates throuh earth conductor surface area for which we also check necessary dissipation area . Please inform then why we are bounding minimum cross section area of earthing conductor by Ixroot(t)/k.What is the significance of this cross section of conductor?
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lyn
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#1

Re: Earth Conductor Sizing as Per IS 3043

06/18/2013 8:55 AM

Read it for yourself.

IS 3043: Code of Practice for Earthing (First Revision)
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dhayanandhan
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#5
In reply to #1

Re: Earth Conductor Sizing as Per IS 3043

06/19/2013 5:16 AM

Dear Mr. lyn,

I opened the link as referred by you, i.e. IS 3043: Code of Practice for Earthing (First Revision)

But it is showing a different subject - on legal rights and NOT Earthing Subject.

Pl. clarify or re-post the correct link here or by personal messaging.

DHAYANANDHAN.S
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lyn
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#6
In reply to #5

Re: Earth Conductor Sizing as Per IS 3043

06/19/2013 8:53 AM

dhayanandhan,

Suggest you look again.

Scroll down and after the first page "Disclosure to Promote the Right To Information" and a blank page you will see that all 85 pages of Indian Standard CODE OF PRACTICE FOR EARTHING (First Revision)

Fourth Reprint June 2007 UDC 621316.99 : 006.76 is there in its entirety.

At least, that's what I get on my PC.
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dhayanandhan
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#7
In reply to #6

Re: Earth Conductor Sizing as Per IS 3043

06/19/2013 12:36 PM

Dear Mr. lyn,

Thank you very much for your guidance. Now I got it. When opened earlier, except the 1st page RIGHT TO INFORMATION, NOTHING WAS THERE.

DHAYANANDHAN.S
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lyn
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#8
In reply to #7

Re: Earth Conductor Sizing as Per IS 3043

06/19/2013 7:09 PM

dhayanandhan,

That omission may have been caused by the switch over of servers performed earlier today by sparkies.

There were many blank screens and blank parts of screens today, till the switch over was refined and the electrons were properly restrained and taught where to go.

Kindest Regards.
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saraswata1981
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#2

Re: Earth Conductor Sizing as Per IS 3043

06/18/2013 1:52 PM

I have read that code in details with latest ammendment but not understood .Pleasae help
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PWSlack
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#3
In reply to #2

Re: Earth Conductor Sizing as Per IS 3043

06/19/2013 3:34 AM

Consult an Electrical Engineer locally.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Pattabhiraman
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#4
In reply to #2

Re: Earth Conductor Sizing as Per IS 3043

06/19/2013 4:52 AM

Keep reading....... Small hint: the selection of cross section of conductor is a function of time withstand capacity of the conductor, which in turn is based on required design defined parameters. This is the start point of any earthing system design.
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electricalexpert65
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#9

Re: Earth Conductor Sizing as Per IS 3043

06/20/2013 3:04 AM

I wish you read IS 3043 a bit more carefully. In India, we largely follow the TN-S system, in which there is a dedicated, separate earthing protective conductor, to carry the earth fault current back to the source. Thus, in such a system the earth fault current does not flow through the natural earth. It is also documented in the first section of IS 3043 itself wherein it is stated that "the earth now rarely serves as a return path for the fault current....".

Thus, as a metallic conductor is going to carry the earth fault current, the cross section of the conductor is very much significant. (Ohm's Law)
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dhayanandhan (2); electricalexpert65 (1); lyn (3); Pattabhiraman (1); PWSlack (1); saraswata1981 (1)

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