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Topic Title: Ring Final
Topic Summary: End to end resistance question
Created On: 24 January 2013 08:17 AM
Status: Read Only
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 24 January 2013 08:17 AM
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Posts: 132
Joined: 06 January 2008

Hi all,
I am working my way through a list of remedial work required by an EICR report. This is in a fairly new detached house.
The ring final L and N end to end values are both 0.41ohms but the cpc is 2.3 ohms.
The report requires 'further investigation'. I am only able to determine the general area where resistance is high and its under solid wood flooring upon which is fitted furniture. The problem might be a loose connection in socket that has been hidden by fitted robes or in an inaccessible JB. Or maybe a crushed cpc.

Resolving the ring is not going to be straight forward but I wondered how serious it is as an issue. Should I just note my findings or convert the ring into two radials and remove the problem part of the circuit?

 24 January 2013 08:50 AM
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Posts: 7780
Joined: 04 July 2007

Yes it does sound like there's a loose cpc connection somewhere, the e-e resistance is about three times what you'd expect! If the circuit is rcd protected I don't think i'd be too concerned. If it were a L or N with that sort of problem it would be more worrying of course,


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