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  1. 1Justin

    1st fix protection from plaster

    So it works this way.. Crappy boarders who don't care make a pigs ear of their work and leave gaps the size of your thumb round the boxes because they can't be arsed to cut accurately. Plasterer comes and plasters over, but some plaster ends up inside the boxes. Because you couldn't get there...
  2. 1Justin

    Tests for replacement consmer unit

    Full test IMO is the only way. On old houses needing a CU, it's normal to find lots of faults. Open rings, reversed sockets, no CPC, borrowed neutrals, nails in cables, no bonding, inadequate earth, mice...Just so many problems... I have spent a week doing CU on 2 bed houses before. It pays to...
  3. 1Justin

    Green OK light in emergency bulkhead lamps.

    FYI From Ansell: "The self test unit inside this product is designed to test the fitting in accordance with current legislation BS EN 62034:2012.  When the unit is first installed the fitting will randomly select a test date of between 200 and 365 Days.  Once this date is set it will continue...
  4. 1Justin

    Green OK light in emergency bulkhead lamps.

    "Self test" I think in this context is a very particular thing, and that's why there's a BS for it. It does include the annual 3 hour test. Lights in a batch have staggered clocks so they don't all go together. I'm sure there is some sort of red/green flashing code LOL, meaningless without the...
  5. 1Justin

    Green OK light in emergency bulkhead lamps.

    Self test is defined in BS EN 62034 as one way to meet the need to do monthly/annual tests as defined in BS 5266- without having to physically isolate each light in turn and monitor it. Lamps cost more, but they switch themselves using an internal timer, and put a load on their battery and...
  6. 1Justin

    Green OK light in emergency bulkhead lamps.

    I kind of thought that might be all it was . Got an old site with a load of horrible old lamps (failed) and some newer ones, but the owner has no records or any info or any procedures or testing records. Looks like they probably aren't self test then (most likely since it was done on the cheap)...
  7. 1Justin

    Green OK light in emergency bulkhead lamps.

    To speed me along with a quote since this is all taking too long and I haven't taken a penny yet. Q) Would a modern LED bulkhead emergency light have a green indicator LED for any reason other than proving that it's a "self test" type in working condition? (In other words do non-self-test EM...
  8. 1Justin

    Top opportunity in world-leading sourcing role.

    Job opportunity. Major brand lighting manufacturer has an opening for a young mechanical engineer wishing to develop skills sourcing down to earth bargain basement products for our Screws department. We sell millions of light fittings. Where would electricians be without the handy little plastic...
  9. 1Justin

    Converting Floor Lamp Halogen to LED - Advice

    If you wire them in parallel (The fitting will already be wired this way), current draw will be approximately 5x(3/12)= 1.25A. I would ditch the dimmer and fit a 12V DC LED driver able to supply that. Get one which can drive 5A and that should cover you. But..do check your digital radios...
  10. 1Justin

    impact drill

    You get exactly what you pay for. There are no bargains in power tools which don't follow that rule. It doesn't prevent you spending too much on a lemon, so it's more about what to avoid at the price you are willing to pay. I recently knackered a low-middling grade Makita, and replaced it with...
  11. 1Justin

    Correct symbols for physics notation

    B or β, why does it matter? A hard time telling the difference with my writing :) ∝ What's the question? - It means something is proportional to another. It alters in the same proportion, when one changes so does the other by the same ratio. So you embarrassment in asking might be said to be...
  12. 1Justin

    Car Chargers

    I'd be interested in views on this since I have a car charger to move soon for one of my customers. The IET Code of Practice 2013 reads (5.2.2 on page 21), "Unless it can be guaranteed by the relevant DNO that the TN-S system is TN-S back to source, and will not be converted to TN-C-S as part...
  13. 1Justin

    IR connundrum

    Disregarding, for the moment that with figures that high you shouldn't hesitate to move on. However it still can make sense. The structure of T&E cable means there is about twice as much insulation between L-N as between LE or NE. So any leakage will be expected to be larger in the latter case...
  14. 1Justin

    Stroma Certification Scheme Stroma Crap-Cert

    I had Stroma onto me last year and their lower fees are tempting. I said that their cert software was quite key to whether I jumped or not. Their cert software downloadable at E-Cert - http://www.stromamembers.co.uk/downloads/Ecert/publish.html can be run as a demo (I can provide U/N and...
  15. 1Justin

    Dimmable flood light

    Any "Raw" LED is intrinsically dimmable. - By which I mean current-source driven lamps without inbuilt mains SMPS power supply. Those lamps will commonly using 700mA drivers, sometimes 350 mA. These lamps are just LED's, - arranged sometimes a few in series, or perhaps (rarely I think due to...
  16. 1Justin

    LED volt drop- maximum LEDS on 6amp??

    Your main and biggest concern is safety. If it's safe for both possibilities, then should some dork from the stone age come along and fit halogens and incandescents everywhere, provided the circuit handles the load (which might be worth five minutes of your time), then volt drop in a fictitious...
  17. 1Justin

    LED volt drop- maximum LEDS on 6amp??

    As others have said, I think the issue is potentially inrush current. I have had problems with commercial-type LED's, and was forced to fit a 16C breaker on an install needing just 0.75 A, with eleven 28 watt lamps in circuit. Inrush current for twelve Meanwell drivers turned out to be over 600A...
  18. 1Justin

    Led strip lights that dont stick !!

    Stick it into an extrusion which is clipped up. Tape will last longer anyway since it takes the heat away.
  19. 1Justin

    Stupid builders........

    I did a new build with loads of sockets in each room. Metal back boxes. After the boarders and plasterers had been in, second fit and it took a while to dawn why every ring final was open. Mysterious bulges in the plasterboard revealed three "entombed" sockets which they just boarded over. Same...
  20. 1Justin

    A Moral issue?

    I agree, in the face of the vast hill humanity needs to climb, someone will always ask why 1 more patio heater is relevant, but that's the point, about 5 billion people say the same. It needs to start somewhere, and speaking up about it is half the battle won. You could agree to fit it only if...

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