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  1. J

    Elementary dear watson

    practically speaking, is the external light Class I or any other exposed conductive parts? If there are no exposed imported earths close to the subject barn, I would say no need. according to the letter of the law (BS7671) this barn may well supposed to be part of the equipotential zone of the...
  2. J

    Forgotten something.

    I read the thread title and i thought the op was suggesting some of us didn't send Santa over to his with a present! Nope i didn't forget just didn't have your address ;)
  3. J

    No earth in garage - should I be worried?

    The earth needs to be good enough to trip the circuit breaker within 0.4s, with that connection itd be doubtful. Those socket testers just check there's some kind of earth, but it may not be reliable
  4. J

    like victor meldrew i dont believe it .string lights

    Definitely an "Earth" fault there on the rcd:rolleyes:
  5. J

    Ceiling speakers in cold deck roof.

    It's the vcl barrier on the warm side that's the issue, if you get a vcl battened to the ceiling joists, then you can put the plasterboard on the battens and you have a nice service void on the warm side that you can fill with holes no issue. Cost for a sheet of plastic and some battens for a...
  6. J

    A good Try!! Good quality Gaffer tape hides a multitude of sins.

    Oh that reminds me we were renting above a shop and one day I caught my foot on something on the floor, felt around and found 2 sharp points poking through the floor boards and about 10mm from the carpet. Went downstairs to the shop and saw the new CCTV monitor screwed to the ceiling! Landlord...
  7. J

    Grenfell tower electrical "expert"

    your bet is irrelevant and admittedly my council owned flat was Westminster rather than K&C however everyone I knew there was lovely. But anyway we can agree to disagree! This thread is about the electrical expert anyway.
  8. J

    Grenfell tower electrical "expert"

    no but your post was 100% innuendo, I'll agree there are so many problems with this country and so many positive things, but I don't think 13 out of a million people are fraudsters is really going to win any awards for being anomalies. I'd rather shine a light on the people in power than the...
  9. J

    Grenfell tower electrical "expert"

    I think you need to go on a crash course in statistics before you can comment on this really. At a guess 25% of london is foreign born, probably half of those have names you struggle to spell so let's say a million. And you appear to be implying 13 out of a million people are convicted...
  10. J

    Funerals and you think plumbers earn a fortune

    OP:Sorry for your loss SWD Strima: I noticed the skips in your area updated their stencil "Level fill only, No Asbestos, No fires, No dead husbands"!
  11. J

    Grenfell tower electrical "expert"

    Not sure what your spelling problems have to do with it, but a few in a million is not unbelievable at all, in fact it seems a bit low and I'm wondering whether they screened most people out earlier, or a lot of the cases were dropped. Think of the result as a shake-down of opportunist...
  12. J

    What actually happened.

    Voltage is potential difference, so if you're saying there's no voltage between earth and anything, even if you touch a live cable it will be floating relative to earth so you can't get a shock. That's a bit like isolating transformers and even workers being clipped to energised power lines...
  13. J

    Grenfell tower electrical "expert"

    Well to follow this up, I'm pleased to say that Whirlpool have completely shredded the evidence of that expert, amongst other obvious points they pointed out that smoke can't trip an RCD in a non smoky area of a flat within 4 minutes, and a fridge freezer doesn't take 5-10Amps! If you're...
  14. J

    Default forum response to DIY enquiries vs. skills shortage

    Proper response is "retrain as a sparky, in 5 weeks, then do your own work, then set up in business and solve the skills shortage." Everyone's a winner!
  15. J

    Insulation Resistance...

    But that's the whole point of ir testing! You want to make sure there's no potential path between any live conductors and anywhere else conductive. Otherwise it would be a case of 'sorry you got an electric shock from the taps, i didn't test that' or just RCD tripping issues. Obviously if you...
  16. J

    Insulation Resistance...

    The test is only valid if the cpc is connected to the main earthing terminal, and the live conductors are disconnected. Even with the Rcbo and main switch switched off if you leave the neutral connected you would be doing a partly global ir test rather than just one circuit.
  17. J

    Regulation 521.10.202 - Wiring systems

    Plastic pipes would melt themselves, and for gas only metal piping is allowed. I think premature has the obvious meaning that the wiring system doesn't fall before the elements it is attached to fail. So if the ceiling is down, the wiring can be down, but if it was almost like a trap where the...
  18. J

    Part F building regs...................

    You don't need to test fixed single bathroom and kitchen extractor installed as per instructions, that's rubbish from a scheme trying to flog a course. You only need to test setups with custom ductwork or multi room variable ventilation eg mvhr.
  19. J

    Grenfell tower electrical "expert"

    For some reason, the grenfell tower inquiry has got an american electrical expert to comment on the electrical cause of the fire. And he doesn't seem to know a lot about BS7671 etc, Firstly he thinks you can't trip an RCD after the MCB has tripped of a given circuit (presumably they have DP...
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    upload_2018-11-29_0-3-9.png

    • johnduffell
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