CPC continuity reading

[EddieB]

Testing a T&E ring main I had the following results, why would the R2 reading be slightly lower than R1 & Rn
the T&E was quite old and the conductor size of R2 was not 1.5 slightly smaller maybe 1mm, ideas on a postcard please
R1 reading 1.2
Rn reading 1.2
R2 reading 1.1

 

[SJD]

Parallel paths, e.g. bonding to pipes etc at more than one point?

 

[EddieB]

supplementry bonding maybe, if this is the case what the next course of action? I'd be likely to leave it as it is

 

[trev]

As you know, when doing continuity readings the cables should be disconnected from the fuse/MCB so parallel paths is an unlikely explanation unless the RFC has been wired in a conduit which is earthed and therefore still connecting to the bonding. As long as you're sure the readings are correct I'd agree with leaving as is mate

 

[rich.250]

What were your R1+R2 interconnected readings???

 

[i=p/u]

it looks ok. as said what was R1+R2 ,earthing system ?what type of fuse /breaker ? then you can safely say she gonna disconnect..