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  1. Richard Burns

    Anyone go their email addresses?

    I believe Murdoch is asking (tongue in cheek perhaps) if anyone has the email addresses for the two pinnacle people of the committee that provides the input for the "information" in BS7671 (as shown in his attached picture). Then he could email them links to the various threads on here bemoaning...
  2. Richard Burns

    Fire rated clips - any suggestions?

    It is certainly your choice to disagree with the regulations, especially as the specific permission is informative, and for you and others to follow alternative guidance that is in excess of the regulations. There is almost no chance of this being considered in any way a failure. However if you...
  3. Richard Burns

    Fire rated clips - any suggestions?

    The risk assessment would be that BS7671 specifically permits the installation method of "no fixings" for the cable type being installed, therefore this is acceptable.
  4. Richard Burns

    Shocks from running hot tap

    The last one I had like that was they had screwed through a cable below the tiled floor and then the shower started leaking and the wet floor became live but only gave shocks when at the earthed taps. Check for above earth voltages on walls floors and pipes and areas of wet in the area of the sink.
  5. Richard Burns

    Induction hob wiring

    Yes, at 1.13 times it must not operate within one hour, at 1.45 times it must operate within one hour. I do not know of a time requirement for tripping at 1.13 times only for not tripping. Though I could be wrong.
  6. Richard Burns

    Induction hob wiring

    Or you could look in the electricians directory on the forum. No guarantee of quality but at least they may have used the forum to learn things!
  7. Richard Burns

    Induction hob wiring

    In accordance with the standards on domestic circuit breakers a circuit breaker must be able to carry 1.13 times its rated current (36.16A) for at least one hour. The thermostats on the heating elements will cut in and lower the power draw well before that point.
  8. Richard Burns

    Induction hob wiring

    On a practical basis the cables will not burn out rapidly, however they could well get too hot to have a reasonable lifetime and this could also make any poor connections worse. The existing oven I might often expect to have a 45A switch for isolation but a 20A one is possible. A 20A switch...
  9. Richard Burns

    Induction hob wiring

    The hob should be OK to be connected in with the 32A supply for the oven using the first diagram with the L1 and L2 teminals linked and the N1 and N2 terminals linked. To have to independently isolated supplies to one appliance could be confusing and dangerous because if someone was working on a...
  10. Richard Burns

    electrical installation on a floating dwelling

    Perhaps with the eye of the mind?:eek:
  11. Bulls head eye of faith.jpg

    Bulls head eye of faith.jpg

    • Richard Burns
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  12. Richard Burns

    Exam question

    I think patdev has it. It would have been just so easy for the question to state "calculated maximum permissible earth bond reading of 0.152Ω" A calculated reading is what reading you would expect to see on the meter when you test and not the maximum reading you could get to allow the tested...
  13. Richard Burns

    Exam question

    Welcome to the forum. The question appears to mix up two different disciplines: fixed wire testing and in service inspection and testing. I am assuming the question is about in service inspection and testing since you mention the COP. Appendix VI contains the resistances of flexible cords, which...
  14. Richard Burns

    Split Concentric Termination

    NBP is presumably referring to 522.8.10 where cables without an incorporated, cpc suitable, earthed covering should be protected against mechanical damage by a conduit or duct. Even though the regulation is worded with reverse emphasis.
  15. Richard Burns

    1000w 5v psu for powering multi mini pcs?

    Mouser seem to have several possibilities, however you will need to take great care in designing your distribution system to function effectively and safely. Presumably these are ones you have already assessed and discounted, but I expect that would be the case for most standard solutions...
  16. Richard Burns

    Split load AFDD board

    The list of premises where AFDDs can be used (not recommended to be used) is at the end of regulation 421.1.7 on the next page and the regulation you give as 537.6 and Pete as 527.6 is probably 532.6. Look up AFDD in the index.
  17. Richard Burns

    New here - lighting question

    The light fitting you have cannot be converted to use a B22 (BC) or E27 (ES) light bulb so the whole fitting would need to be replaced with a suitable bayonet or Edison screw lamp holder. You mention E22 which is not a light fitting designation and also mention screwing a lamp in which would be...
  18. Richard Burns

    Fire rated clips - any suggestions?

    Since in domestic very few cables will need to be supported beyond existing practice, I thought of using stainless steel strapping, cut a strip to the length required and hole punch for a fixing screw . Cheap and cheerful, just not practical timewise, despite the low cost, for a regularly used...
  19. Richard Burns

    20mm flexible conduit through steel

    Alternatively a very short section of 20mm rigid with female adaptors glued on each side.
  20. Richard Burns

    20mm flexible conduit through steel

    You could use a galvanised threaded coupler. Or just push a small section of larger rigid conduit through to protect the edges a bit like MFS has said above.
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