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jpgupta69
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Join Date: Feb 2012
Posts: 2

Earth Resistance

03/09/2012 1:21 PM

What should time interval of earth pit resistance measurement as per IS or IEC.
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lyn
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#1

Re: Earth resistance

03/09/2012 1:27 PM

Why not just post all the test questions at once?
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justinanto1987
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India - Member - Justin Anto Engineering Fields - Electrical Engineering - Marks never made me laugh, but good memories did

Join Date: Sep 2010
Location: Thrissur, Kerala, India
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#2

Re: Earth Resistance

03/18/2012 7:19 AM

Every three months after installation for the first year, after that once in 21 months under dry soil conditions according to MIL-HDBK-419.

Dry soil is defined as no rainfall during the previous 3 days.

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electricalexpert65
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Join Date: Oct 2009
Posts: 2061
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#3

Re: Earth Resistance

03/20/2012 11:55 AM

The earth resistance shall be measured at least:

a) Once a year for HT / EHT Installations [vide IER 67 (5) (b)]

b) Once in two years for LT Installations [vide IER 61 (5)]

(IER - The Indian Electricity Rules, 1956)
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