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Discuss End to end resistances in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

stidge

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Arms
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Testing a ring main today R1=.38 RN=.38 R2=.38 As you can see the same low reading on the cpcs.I have checked these and am sure they are only 1.5mm(L,N 2.5mm) Whats occuring?Has anyone else come across this.Thanks in anticipation:confused:
 
Hi stidge, had a ring main a few weeks ago where the end to end on the CPC was lower than that of line & neutral! Never got to the bottom of that one either.
 

stidge

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Arms
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  • #4
Thanks lads .It was t&e marksparks.What do i put in test results.Obviously it added up but should be about 1.67 times higher.ta
 
the results are what the results are maybe cpc is lower due to a sup bond giving a better path.
sometimes it can be a lot lower due to this(dazza)
 

stidge

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  • #7
I know what it should be old dog but what suggestions have you for the reading im getting.ta

Thanks dazza
 
Last edited:

old dog

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Arms
I know what it should be old dog but what suggestions have you for the reading im getting.ta

Thanks dazza
last time i got reading near that the t&e was in conduit its hard to say without
knowing more about the set up as mark pointed out some sort of parallel path
 
A

ajelec10

hi guys just a thought ive had this problem a few times and its been because at each socket the cpcs have been twisted together and sleeved together you wouldn't belive how much difference it makes?
AJ
 

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