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Showing content with the highest reputation since 19/06/18 in all areas

  1. 3 points
    They have to be installed in compliance with the Electricity at Work Regulations. Domestic or not. With “contracts” like those on offer here the OP seems to want a fixed price for the job regardless of location & condition of the existing installation. Following BS 7671 in full is a HSE recognised method for compliance with EAWR. This is supplemented with the IET guidance which includes the CoP for vehicle charging installations. The crux is that because the DNO's are allowed to breach ESQCR so they can mximise profit for their foriegn owners to syphon off via tax loopholes to their own countries to bolster their profit there and subsidise their home countries network at the expense of the UK, a vehicle charging point must be TT, basically. No allowance for things like asbestos being found during the works, it has to be done as cheap as possible with no regard to safety. The thing is the installer is the one HSE will target if there is a death. An issue often overlooked is that the charger is in the vehicle & the mains earth is common to the vehicle body. Thus failure of the CNE conductor in the distribution network could be fatalif the supply to the point is TN. Also, So the cost for ensuring that the job is safe is passed back to the householder/installer, to allow for the failings of the multi £M profit making DNO.
  2. 2 points
    Skip the cheap option, how much is the food in the freezer worth? Penny wise, pound foolish.
  3. 2 points
    I think where we are eventually going with half hourly slots priced according to demand could work out ok, but not with the current generation of smart meters, we need ones with an interface that allows pricing (and predicted future pricing to be accessed). That why you could set your electric car to charge overnight at the lowest rate possible but with the proviso that it must be fully charged by 7-00 when you need to leave, the fridge compressor could shut down for two hours at the evening peak if the door hasn't been opened and the electric car you have just parked up with 40% range remaining could backfeed into the grid during the evening peak, before it recharges later on. We need to get to a point where demand can be matched to supply; renewable means are generally a bit sporadic in generation, we will need to meet the base load with nuclear generation, and these cannot be run up just when required, so controlling the supply to match demand is a little out of our hands, but demand could be matched with supply. There was some work done on this about 15 years go looking at grid frequency, the loading of the grid could be judged from the frequency, a slowdown from 50hz to 49.95 foexample woud suggest its struggling to meet demand, where-as 50.05 might suggest there is plenty available, not sure if much ever came of what they did. http://www.dynamicdemand.co.uk/ The hysteresis of it all would need looking at though, if the unit price goes down suddently, the demand would come online, and there would no longer be a suplus and the price would have to go back again, in which case all the loads decide to switch off again....
  4. 2 points
    Using fossil fuels also has a dertrimental effect on marine life - acidification of the oceans. This has always been a conundrum, if you want to protect the eco-system something has to give way somewhere, I don't think the enviromental lobby has ever got its act together on this, they seem to want to protect every last sq mm of earth, but then condemn these sorts of schemes - can't have it both ways, and I'm sure schemes can be designed to minimise impact on marine life.
  5. 2 points
    You (who has randomly replaced parts with ones of unknown origin from eBay!) are not competent to be diagnosing this issue. That is what this (and everything else you have written) tells us. Contact an Electrician. That is the ONLY answer to this. Stop messing about with it - you clearly don't know anywhere near enough (if anything) about it.
  6. 2 points
    These are a few pictures of a British MAR bulb that was donated to us a while ago. It came in the original transport box with papers and labels. It's a 40 Amp 3 phase bulb. The transport crate:
  7. 2 points
  8. 1 point
    would you work very well if you were stuck in a hot loft? no? well your inverter feels the same
  9. 1 point
  10. 1 point
    Came across some letters that were published on The Telegraph website, hidden behind a paywall. I'll just leave them here: SIR – The purpose of “smart meters” (Letters, June 26) is to allow the eventual introduction of charging of domestic users at different rates according to the time of day, the day of the week and the season of the year. Power companies already know when we use most energy in the aggregate but, except for very large energy users, they are at present unable to bill individual customers according to the exact time that energy is used. Smart meters will allow them to do this, so if you are unreasonable enough to want to turn the lights on when it gets dark, or cook food at mealtimes, or charge the electric car that the Government wants to force you to have, ready for the morning commute, then you will be hit with penal levels of billing. These meters are voluntary now, but they won’t be voluntary for ever. You do not have to have a water meter, but if your house has one, you are forbidden to go back to water rates, though metered water probably costs you about half as much again as rated water. Eventually, if you have a smart meter for energy there will be no going back and you can expect your bills to rocket. The lucky few will be those living in houses where a smart meter was never installed. Anyone who does not believe this should cut this letter out and keep it – and read it in daylight, obviously. Dr Richard Austen-Baker Abbeystead, Lancashire SIR – Until 2003 I was responsible for the type approval of gas and electricity meters at Ofgem’s Technical Directorate. After this I spent several years on European and international committees negotiating measurement standards for next-generation meters. Only common sense can show how savings can be achieved. For instance, smart meters will show what it takes to run a washing-machine cycle but they cannot advise that it would have saved energy to await a full load. A smart meter can tell you what an appliance uses under certain conditions if you take the trouble to ensure all other appliances are off at the time. However, this information is readily available in manufacturers’ data. An estimated cost of £200 for each meter will add at least £20 to bills each year, as it is the consumer who will pay for these “free” meters eventually. Smart meters give only freedom from estimated bills or a visit from the meter reader. However, suppliers are now very good at estimating usage and a periodic visit by the meter reader can allow safety or measurement problems to be checked. The meter suppliers and fitters enjoy the increased business and profit that fitting smart meters brings. The Government is supporting the programme, but this seems to me like its encouragement for switching to diesel cars some years ago. I believe that the hidden agenda behind smart meters is that they will allow half-hourly charging. Instead of having two charge rates (day and night) the price of energy will change every half hour, so when solar and wind generation are low and usage is high the price of electricity will rise steeply. What would make more sense than smart meters is smart appliances that could be automatically switched on or off depending on electricity-grid demand. For instance, fridges, freezers and some battery chargers could be switched off at peak demand periods, as could some washing machines and dryers. It is claimed that smart meters are safe and secure. Not having one, because they are not needed, is even more safe and secure. Jerry Fulton Draycott, Somerset SIR – You cannot fatten a pig by weighing it and by the same token you cannot reduce your electricity consumption simply by measuring it with a smart meter. Crombie Glennie Hawksworth, Nottinghamshire
  11. 1 point
    just drill a larger hole though it. or does it need the end hammered down a bit to make it smaller
  12. 1 point
    Thank you. Now linked on Facebook.
  13. 1 point
    Hi Geoff, The mill is the Broekmolen in Stramproy in the south of Holland. There are not too many watermills in Holland due to lack of head. We have three sets of millstones and all gears are made of wood. The website is; www.broekmolen.nl but that is in Dutch and a bit outdated. Most progress can be seen on our facebook page: https://www.facebook.com/broekmolen Small impression of the mill running: Kind regards, Hubert
  14. 1 point
    Tidal power is fairly OK but does not manage to produce a lot of power, there are also very few places where it can be effectively utilised. However tidal systems also have a major detrimental impact on marine life (barrages are worse than lagoons), especially in the best places for tidal power as they tend to be very diverse ecosystems because of the constant effect of the tide.
  15. 1 point
    Yes. I work with four fellas from the south and I am from the north. I have family in the south too
  16. 1 point
    Murdo don't hold your breath for too long ...you can die from it you know!!!
  17. 1 point
    Or put one into storage and use the 2 prismatic of mine in a 'discrete location' or tell them to stop being so faddy, suck it up buttercup, and swap ALL for LEDs!.....that should focus their minds
  18. 1 point
    You have got to the end of the amount that is possible to assess without exposing yourself to risk. If every item of current using equipment was disconnected from the ground floor ring when you were testing then it would indicate that the fault is in the circuit and not in any appliance but it would appear to confirm that the fault was on the ground floor ring and not the other circuits. However it is very easy to miss items such as boilers on fused spurs from a ring or possibly outside lights / power wired from the socket ring, another common one is under cupboard kitchen lighting, Because turning off the circuit breaker worked it would be a line to earth fault. Turning on the circuit breaker and the RCD tripping at once may indicate that the fault is getting worse and the initial current surge on switching on is enough to cause the fault to manifest, it is probably best not to keep energising a faulty circuit as this may cause the RCD to fail eventually and circuit breakers do also have a limited switching life. If you can inform the electrician of what you have done then this will make their job a lot faster, though they may still need to check your findings. I would also say that intermittent faults are sometimes hard to trace. To be able to proceed further would need an electrician's test equipment to be able to narrow the fault down to its location. To minimise inconvenience whilst waiting for their arrival I would suggest that you should be able to use extension leads from the first floor sockets for essential items as there appear to be two rings covering that area and so the chance of overloading is very small.
  19. 1 point
    itll trip in the 1/2 test when it shouldnt. therefore its faulty
  20. 1 point
    Without disconnecting the neutral legs of the circuits you aren't proving much. Any one of those 6 circuits could supply current through a neutral - earth fault to any part of the installation that is connected to the common earth and neutral terminations at the fuse box. This problem needs correct test gear to start eliminating circuits out of the equation. Doc H.
  21. 1 point
    Surely if you are fault finding then as many tests as possible will eliminate or locate a potential source of the problem?
  22. 1 point
    prescribed tests are enough, however ramp can sometimes be useful for fault finding.
  23. 1 point
    Has that "Earth" wire just been pushed into the ground? This has to be a wind up right?
  24. 1 point
    Tony is right, the filament will overheat if fitted lamp holder down, at the lamp holder end there is a clear bit of glass to let out the heat.
  25. 1 point
    Believe it or not most of the electricians here are qualified to a standard way above your skill level. We try to maintain standards in our trade, idiots like you are a blight on our respected trade.


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