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  1. KeenPensioner

    Christmas LED lights wiring

    Thanks for your replies. I'm sorry for my poor circuit diagram. The lights re powered by a 36V transformer.
  2. KeenPensioner

    Christmas LED lights wiring

    Can someone explain how these are wired - a diagram would be great. I have stripped a few bulbs just to see how they are wired. One continuous wire goes all the way back to the source and that leaves some bulbs with 2 wires connecting them and others with one wire connecting them. I have...
  3. KeenPensioner

    110 V between L and CPC

    Can't thank you enough for your help. I'm not qualified but have loads of theory. I managed to trace the fault in the cpc - it was at the cu with an over tightened terminal that had broken one of the conductors. I'm chuffed to bits.
  4. KeenPensioner

    110 V between L and CPC

    Thanks again. I have a spare way in the cu so I think I'll just split it into 2 (20A) radials
  5. KeenPensioner

    110 V between L and CPC

    Thank you all for replying, I appreciate that. I followed Julie's advice and linked the cpc and L from each leg and did get continuity from different sockets depending on legs. There are 8 sockets on the ring (and 1 spur). From one leg I got 6 giving continuity and 2 with >2000 ohms. Swapping...
  6. KeenPensioner

    110 V between L and CPC

    I am in training and decided to do some dead tests using my second hand Fluke MFT 1653B on an upstairs ring. I did the tests at a socket rather than at the CU. Results end to end L - L 0.74 ohms, end to end N-N 0.76 ohms, end to end cpc >2000 ohms. I checked all the sockets on the ring and...
  7. KeenPensioner

    Earthing SWA

    Thanks for taking the time to reply. Makes perfect sense - why didn't I figure that out!
  8. KeenPensioner

    Earthing SWA

    As an adult learner, I have lots of theory but not enough practical experience so I'm hoping I can get some help here (not abuse). I'm trying to get my head round earthing SWA to an outbuilding with no extraneous conductive parts. I understand the problems of exporting a PME supply etc. If I...
  9. KeenPensioner

    Consumer Unit isolator with RCD

    How awful, just shows how easy it can happen. Thanks for explaining that.
  10. KeenPensioner

    Consumer Unit isolator with RCD

    Thanks for the reply. What happened to cause the fatality?
  11. KeenPensioner

    Consumer Unit isolator with RCD

    Found this from Delroy...at 1.33 minutes in..
  12. KeenPensioner

    Consumer Unit isolator with RCD

    Thanks for your prompt replies. I'll just wait and have the board updated.
  13. KeenPensioner

    Consumer Unit isolator with RCD

    I have an old CU with BS3036 rewireable fuses. I'm having the board upgraded soon but in the meantime I'd like to add RCD protection. Can anyone tell me where I can find a consumer unit isolation switch with RCD built in - to fit between the meter and the CU?
  14. KeenPensioner

    Insulation Resistance zero Ohms

    Thank you all so much, I've learned a lot and actually found what the problem was. It was a fused spur feeding a burglar alarm system. Thanks to everyone who took the time to reply.
  15. KeenPensioner

    Insulation Resistance zero Ohms

    Thank you all for taking the time to reply. I have a lot of theory but little practical knowledge. I'll disconnect the conductors from the top of the RCBO (as everyone suggests) and see what I get.
  16. KeenPensioner

    Insulation Resistance zero Ohms

    Thanks for taking the time to help. I understand the dangers of damaging electrical components and that's why I used a voltage of 250V (as I said - this is just practice for me). I turned the RCBO off during the test and I assumed that I was not sending a voltage through the RCBO, I am...
  17. KeenPensioner

    Insulation Resistance zero Ohms

    I tested at the RCBO terminal screws
  18. KeenPensioner

    Insulation Resistance zero Ohms

    Hi all. As I've said before, I'm not an electrician but an adult learner. I have a second hand Fluke 1653B MFT which is out of calibration but I use a CalCard to see how far out it is and it's not too bad. I've watched a thousand videos on EICRs etc and just want to increase my knowledge - if...
  19. KeenPensioner

    Cable calculation parameters

    Thank you for pointing me to this article but I've already read that. I fully understand conditions (1 and 2) but I'm struggling with condition (3) - I2 ≤ 1.45 Iz. I've followed several worked examples elsewhere (Chris Kitcher, SparkNinja) and they refer to It being derived from Ib and In...
  20. KeenPensioner

    Cable calculation parameters

    Thank you for taking the time to reply. You say in your reply "be less than or equal to Iz (Current Carrying Capacity of conductor or It (Tabulated/Corrected Current carrying Capacity"). Am I correct in assuming that after correcting "Ib" to account for environmental and installation methods...

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