Recent content by soms

  1. soms

    Unregistered landlords meter swapped by builder

    Sounds like a right muddle, and a potential heacache for your neighbour if they are paying for your communal areas and having to recharge it with no formal agreement in place. The ins and outs of this really come down to who owns and operates the electrical supply and metering equipment. In a...
  2. soms

    R1 + R2 methods (r1 r2 link)

    I know the link kits you are describing, the PZ2 end is magnetic so it sticks to ferrous terminal screws. I haven't used them myself, have heard mixed reviews, some are of poor quality by the sounds of it. So if the purpose of the links is to avoid dismantling entirely, you will not elimate any...
  3. soms

    Am2s specification or helpful revision

    Have a look at this website regarding the electrical apprenticeship. There is an Assessment Plan document which includes a detailed explanation of the AM2 End Point Assessment...
  4. soms

    PV Cable Runs Outside

    I do not have the code of practice but from the fundamentals of BS 7671 my starting point would be: Both AC and DC cables should be selected and installed as per the requirements of BS 7671, e.g. selection and erection, external influences, flora and fauna, premature collapse in the event of...
  5. soms

    Convert a dry lining box into a surface mounted box

    Regarding fixings to the wall, I would be careful and perhaps experiment with any fixing solutions you wish to try on some sample materials. If your customer tells you that any wall cavity could contain asbestos, I would consider the risk of penetrating the cavity to be high, even with trying...
  6. soms

    The drawbacks of been a sparks!

    Fairly new to the game and have never seen anything like that. Can appreciate what @Pete999 said about it being an art to use it. All I can say is that it's all Greek to me :)
  7. soms

    New cable support regulation 521.10.202 (18th)

    Because this is one of the major changes and could be life-saving, I really would like to know what is and isn't acceptable when seeking to comply with this regulation. The IET is holding an event about the 18th Edition in London in January, I have e-mailed them with a question which I would...
  8. soms

    RCBO for old Square D distribution board

    Just to let you know I have performed the tests again with the circuit disconnected and achieved considerably better disconnection times. I was surprised what a difference it makes. Having checked my own notes I appreciate that it was my error in forgetting to disconnect all loads the first...
  9. soms

    RCBO for old Square D distribution board

    @westward10 thank you for the advice. I will give that a try.
  10. soms

    RCBO for old Square D distribution board

    No, I didn't, I tested it at a socket outlet with the circuit connected. I can see where you are going with this, would you repeat the tests at the RCBO terminals without the circuit connected?
  11. soms

    RCBO for old Square D distribution board

    I replaced the circuit breaker with the new RCBO last night. I tested the circuit Riso, Zs, and the RCD trip times. Riso live conductors to earth was under 1 Mohm so needs some further investigation, but not at 8.30 in the evening. Zs 0.77 ohms. The RCD trip times are not meeting the...
  12. soms

    RCBO for old Square D distribution board

    That is probably true. They won't grudge spending the money, I told them something should be done before any alterations are made. I will just buy one. Thank you all for helping me bat some ideas around and pointing me to a suitable retrofit item.
  13. soms

    RCBO for old Square D distribution board

    Replacement is another option, but it would a fair job, as there are also off-peak circuits so would require two new consumer units.
  14. Square_D_QO1_12F_DB_2.jpg

    Square_D_QO1_12F_DB_2.jpg

    • soms
    • Media item
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    • Category: Electrical Videos
  15. soms

    RCBO for old Square D distribution board

    Thanks for the advice, it is nice to know you can actually make contact with a manufacturer and get sense from them if required. @westward10 thank you for this information, that is very useful to know. Thanks for quoting the correct part number, I have had a quick look online and they seem...
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