Recent content by Michaelwgroves

  1. Michaelwgroves

    Boiler circuit 16A MCB

    I received the latest Guidance Note 4 - Protection Against Fire yesterday. My first observation is it's the first guidance note I've ever known to have shrunk! 12 pages.......... The wording has been updated, but seems to read largely the same, as per below; “The intent of Regulation...
  2. Michaelwgroves

    Boiler circuit 16A MCB

    It's on the back, so IP is not an issue. My use of the word 'grommet' was sloppy, sorry for any confusion. Yes it was a gapping hole in the back Stroma were concerned about. They advised using rockwall or fire foam. I prefer rockwall as it's easy to pull in/out for future maintenance.
  3. Michaelwgroves

    Boiler circuit 16A MCB

    Yes, we are talking about enclosures. If you make a hole in an enclosure, how do you make that hole comply. In this thread we are talking about 32mm knockout. In my stroma assessment, it was 6" knockout in back of consumer unit. However, both holes give open into cavity, which would allow fire...
  4. Michaelwgroves

    Boiler circuit 16A MCB

    Test & Inspect was required for my CPS with Napit, and previously for Stroma.
  5. Michaelwgroves

    Boiler circuit 16A MCB

    I've no experience with NICEIC, I recall Stroma having two competencies, but for sure, my Napit includes EICR's.
  6. Michaelwgroves

    Boiler circuit 16A MCB

    That would apply to every question on this forum. You mistake the spirit of forums, it's not a place to put others down, to make yourself feel superior. Your comments say more about you. Maybe take a look in the mirror............. Interestingly, those that criticised, did not put forward any...
  7. Michaelwgroves

    Boiler circuit 16A MCB

    I would argue it is a requirement from 17th edition. Guidance Note 4 (17th Edition) - Protection Against Fire advises 3.8.1 Consumer Units & Similar Assemblies in domestic premises 'The Installer must seal all openings into the non-combustible enclosure or cabinet for cables, conduits, trunking...
  8. Michaelwgroves

    Boiler circuit 16A MCB

    Thanks mate, really good link. Learnt a bit about flexible cables.
  9. Michaelwgroves

    Boiler circuit 16A MCB

    Excellent post, thanks for taking the time to put this together
  10. Michaelwgroves

    Boiler circuit 16A MCB

    So how would you prevent the spread of fire for a knockout?
  11. Michaelwgroves

    Boiler circuit 16A MCB

    I agree with your comments, but what is fine wire and very fine wire ?
  12. Michaelwgroves

    Boiler circuit 16A MCB

    I'd not thought about, Selectivity, this is a good point. Saving myself doing the maths, what size MCB do you put on boiler circuit to achieve selectivity?
  13. Michaelwgroves

    Boiler circuit 16A MCB

    For clarity, I am referring to 'Wylex Fire Retardant Membrane Cable Entry'
  14. Michaelwgroves

    Boiler circuit 16A MCB

    Its a 1mm cable from FCU to boiler. 526.9.1 requires suitable terminals. I'm now curious on the definition of fine wire & very fine wire. I'd say 1mm would come under this regulation. Any multiwire cable below 2.5mm I put a feral on. But I'm not aware of the physical difference.
  15. Michaelwgroves

    Boiler circuit 16A MCB

    My concern was protection against fire, the consumer unit is now open to the cavity. Any internal fire within the consumer unit could now travel freely in the cavity. A blind grommet would have easily resolved this.

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