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  1. N

    Unexpected Reading Between Earth And Neutral

    What do you mean John, I don't understand?
  2. N

    Unexpected Reading Between Earth And Neutral

    Ahh, thanks Andy I get it!  I appreciate your input, many thanks.
  3. N

    Unexpected Reading Between Earth And Neutral

    Hi Andy, Good point.  But how do you isolate the circuit with the earth fault then if the fault is on a different circuit to the one you are testing - surely it could be on any of the circuits as all the earth's are connected?
  4. N

    Unexpected Reading Between Earth And Neutral

    Sorry, its too late and my brain is already hurting on other stuff - missus not helping! I will have an answer for you but I need some time to think and research. The regs does say that insulation resistance tests should be conducted with the protective conductor connected to the earthing...
  5. N

    Unexpected Reading Between Earth And Neutral

    Pro Dave, can you expand a bit ion yesterday's question, not sure if the answer: But that's not the end of it. A N-E fault can cause an rcd to trip when a heavy load is drawn on a different circuit. Can you work out why or how? Thanks Andy, that's really helpful too!  I'll let you know if I...
  6. N

    Unexpected Reading Between Earth And Neutral

    Cheers Pro Dave, for the inexperienced, wiring of switches (which should be quite obvious in theory) is a bit of a headache!  
  7. N

    Unexpected Reading Between Earth And Neutral

    Thanks Pro Dave, does it make any difference (except for the on/off switch position) if the red was in L 2 and the blue in L 1 (ie the other way around?) Meant to say as long as the corresponding L1 and L2 is used on the remote switch.
  8. N

    Unexpected Reading Between Earth And Neutral

    Thanks Andy, this is a picture of the switch plate at one end, there are 10 separate cables in here for the 4 switches but I have brioken it down in my previous post to 5 cables for 2 switches and then just the wiring for one switch.   If you remember I thought I had fixed the rcd tripping...
  9. N

    Unexpected Reading Between Earth And Neutral

    Please, as little abuse as possible appreciated: I have a 4 gang switch at each end of the room serving 4 sets of 12 v lights, one switch for each set of lights.  For ease I will describe the cabling for one half of the switch plate (i.e. 2 switches as it is mirrored for the other 2 switches...
  10. N

    Unexpected Reading Between Earth And Neutral

    Hi Pro Dave, Is it because the high current draw is inducing a current in a neighbouring circuit?
  11. N

    Unexpected Reading Between Earth And Neutral

    Yes I recognise it is very low.  Why doesn't the rcd trip then?
  12. N

    Unexpected Reading Between Earth And Neutral

    Hi Pro Dave, Reading should be 1 M ohm or greater however it is accepted that in the field a measurement above but close to this number should still be considered a fault.  The lower the Mohm reading the less resistance is being found - the resistance of the conductor if insulation is good...
  13. N

    Unexpected Reading Between Earth And Neutral

    Hi kerching, Opps, the cal at the bottom should be 560/16000 = 0.035A Test was at selected tester voltage of 500V but the tester screen gave me an actual reading of 560V during the test. I just noticed that 2 of the line conductors were not connected when I visually checked the light switch -...
  14. N

    Unexpected Reading Between Earth And Neutral

    Andy, you might be the most experienced electrician on the planet but if you keep up the attitude you will keep getting the same s**** back.  Why don't you try to be helpful for once instead of just being a d***?  I (and I'm sure other posters) would prefer to see an intelligent and helpful...
  15. N

    Unexpected Reading Between Earth And Neutral

    Here are my measurements for 4 of the circuits so far.  I removed each L, N and E and connected directly with crocodile clips (I removed the L's as one mcb had two circuits and it was just easy to remove the others as well although I know I didn't need to Andy): All numbers are Mohms Kitchen...
  16. N

    Unexpected Reading Between Earth And Neutral

    Hi Noz, yes, I meant to say that I should have been more precise with the M instead of m in my post.
  17. N

    Unexpected Reading Between Earth And Neutral

    Hi Andy, What do you think I should be reading?
  18. N

    Unexpected Reading Between Earth And Neutral

    Hello All, I didn't have time today to check the readings taken last week that have been discussed here as the client needed the RDC tripping issue sorted - which is is!  Loose wiring in the switch plate. I ran an Insulation Resistance test with 500V at the DB in the stable block.  The system...
  19. N

    Unexpected Reading Between Earth And Neutral

    Oh no, you mean I have to go to the pub after work tomorrow?!
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