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Discuss Ring final testing question in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

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  1. 7671
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    7671 Active EF Member

    Location:
    south
    Testing my extensions wiring today and noticed cpc fails continuity. Howevery I have continuity from outward leg to main earthing bar in CU

    Any ideas how ?
     
  2. Vortigern
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    Vortigern Electrician's Arms

    Location:
    England
    Business Name:
    F.H. Electrical
    Mixed up the wires?
     
  3. 7671
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    7671 Active EF Member

    Location:
    south
    I did remove a couple of other cables of similar size to see if that was the case but ran out of time, will try again tomorrow. Wasn't overly bothered as all other tests were fine
     
  4. Vortigern
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    Vortigern Electrician's Arms

    Location:
    England
    Business Name:
    F.H. Electrical
    Ok, maybe new day and feeling brighter might answer your question.
     
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  5. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    Interesting comment.

    So if this is new wiring in your extension you are testing, and you did the install, then fault finding it should be very easy..... how many sockets etc on the circuit?
     
    • Agree Agree x 2
  6. Pete999
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    Pete999 Trusted Advisor

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    Northampton
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    Is this a twin and cpc installation? have you managed to identify the individual cables? if yes then it's probably a loose or missing connection at one of the sockets, or a bad connection during testing.
    What were the r1 and rn readings, how many sockets are involved ? sorry if these questions have been asked before.
     
  7. FatAlan
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    FatAlan Trainee Trainee Access

    Location:
    Surrey
    If you did end to end on the CPC and failed to get continuity and then get continuity on one half doesn’t that answer your question?
     
  8. Pete999
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    Pete999 Trusted Advisor

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    Did you do your testing like this?
     
  9. Midwest
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    Midwest Electrician's Arms

    Location:
    Oxfordshire
    Continuity test of RFC conductors, is one I breath a huge sigh of relief when I get suitable results.

    You need to go round and test each accessory, and find out where the failed termination is.
     
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  10. kingeri
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    kingeri Trusted Advisor

    Location:
    Yorkshire
    Nice of him to get back on and let us know how he did!
     
  11. Pete999
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    Pete999 Trusted Advisor

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    Agree and some thanks for the help, not holding my breath though.
     
  12. 7671
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    7671 Active EF Member

    Location:
    south
    Easy girls been busy, resolved by trying all the other CPC's on the board. I knew it was there as i said before as i was getting continuity between CPC and board
     
  13. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    ^^

    I still don't understand. End to end continuity tests are the first to do on a new or a modified ring circuit.

    Surely you know which are the correct ends?
     
  14. Pete999
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    Pete999 Trusted Advisor

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    A
    You would have thought so.
     
  15. 7671
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    7671 Active EF Member

    Location:
    south
    Ah, must have miss led you some what, I didn't complete the wiring in my extension just testing after adding a couple of points in the kitchen.
     
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