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  1. M

    Testing after a consumer unit change

    Always do the tests before which are end to ends and Zs at every accessible point on rfc, lighting Zs but at switches if a ceiling full of downlights and dimmers involved, Zs on any radials. L&N - E ir for each circuit. Additionally when more than 1 lighting circuit I do a functional test...
  2. M

    New consumer unit, builder says upgrade supply

    Read post 62 first. I do not believe there is any basis for that statement without knowing more facts
  3. M

    New consumer unit, builder says upgrade supply

    How can you tell if the tails are undersized? The tail size is dictated by the dno ocpd. We do not know the size of this ocpd, the csa of the existing tails or the current handling capacity of the meter. The only details we really know about this installation is that the central and water...
  4. M

    EIC certificate help

    Hopefully you would know what version you are installing to. It is stated in the first few pages of the regs book, maybe on the cover even. If it is asking about the supply characteristics and means of installation earthing then you put down what is at the origin
  5. M

    PME supply block of flats

    You need to install in accordance with BS7671 AND read your DNO policy document such as I linked to in post 18 and comply with this. This covers bonding requirements towards the end. Locally my DNO supplies and installs the Ryefield boards because they have had so many instances of refusal to...
  6. M

    PME supply block of flats

    https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&ved=2ahUKEwj_jeDzuqDiAhW7ThUIHQ-6D0YQFjAEegQIBhAC&url=https%3A%2F%2Fwww.westernpower.co.uk%2Fdownloads%2F6696&usg=AOvVaw3-kubN9VZIPs0_hMS567N9
  7. M

    PME supply block of flats

    The BNO should have the spec of the supply so you can determine the size of the N, if not a quick phone call to your DNO would be the way to proceed. Your DNO will have a policy document for their requirements for protection for multi way distribution units (Ryefields etc), ask for a copy
  8. M

    Capacitive Inductance

    Test the swa at 1000V? Have you tried only using two cores and use the armour as cpc?
  9. M

    Capacitive Inductance

    Well, if it isn''t the cable it will be whatever is on the end of it such as a pump with high earth leakage. Can you PA test it with a decent tester to determine the amount of leakage?
  10. M

    TT system eic minor point

    New circuits. Ra of 229 Ohms therefore the rcds are for fault protection by design. Zdb of 0.29 (10mm gas bond) so are the rcds classed as additional protection?
  11. M

    PAT Tester broken but i can use megger?

    As Westward 10 saysyou will miss the high current earth bond test, you will spend ages pratting about trying to get good continuity. There are frequently Seaward Supernova Plus's for sale on ebay for ridiculous money, I bought another the other day for £25.22 delivered. Cracking tester if a bit...
  12. M

    Moving to radials in Kitchens

    Personally I use a 25A ocpd on a 4mm radial
  13. M

    Red Link - who pays for it ?

    I would have thought the DNO would be happy to fit an isolator (switch) after the meter (for a fee) but a red link is used in a supply fuse holder to replace a fuse, where there are two fuses in line for example. It is not usually an additional way to isolate and has seals. I doubt if they...
  14. M

    Double insulated LED downlights

    To maintain cpc continuity, purely a loop in loop out function. The specs state double insulated.
  15. M

    Double insulated LED downlights

    JCC V50
  16. M

    IP rated switchcover

    Quinetic wireless switch somewhere instead? They started doing ip rated ones recently. No worries about zones either
  17. M

    13amp Hot tub supply

    After having read 702.53, not too close!
  18. M

    What’s the going rates for the below instalation

    If you are splitting the tails as you state in post 1 and then running in swa, my first choice would be to use a switch fuse rather than an mcb/rcbo
  19. M

    Insulation Resistance Results

    Crudely put, your meter is telling you that over half the length of the circuit, it is unable to measure an amount of leakage (sub 2000MOhms). However, when you double this distance, it is able to measure an amount of leakage. In t & e the live conductors have insulation surrounding them, the...
  20. M

    What is the BS number of the DNOs cutout fuse?

    Surely if you haven't visually verified it, the only thing you can record is not verified

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