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  1. Pat H

    Using a cavity wall gap for cables

    Yes the wall is empty no cavity filling at all. Loads of space at the top so can ensure a nice bend radius. Not so easy at the bottom as it comes into the rear of the CCU. But the bend there has no load on it.
  2. Pat H

    Using a cavity wall gap for cables

    My biggest concern would be the spacing between supports vertically. But I can probably solve that as well. If I allow enough cable slack initially I can affix the cables to a support and lower that into the cavity and then secure. Other than that I can't think of any other reg restrictions...
  3. Pat H

    Using a cavity wall gap for cables

    Yes thanks. As you said it maybe an interesting debate:-)
  4. Pat H

    What do you reckon then?

    Here's what I do. Cut a 63mm hole in a spare bit of ply or mdf. Take the round plug you just cut and screw it to a new piece of ply or mdf. Take care to use 2 screws away from the edge of the round plug. Re drill the pilot hole from the round plug through the new mdf. Now lift the new mdf and...
  5. Pat H

    Using a cavity wall gap for cables

    I can support the cable at 3 accessible points on it run up. Drip point not an issue as this is an internal wall now not external. The wall each side of the cavity is more than 50mm thick so the cables are deep compared to the surface. unlikely to be any holes bored through as this is an...
  6. Pat H

    Using a cavity wall gap for cables

    Looking at a job that needs cables running up to a loft space. Had originally planned a cable route from CCU through wall into garage (part of side extension) along top of garage inside wall then up through the bedroom above into the loft space. All surface mount clipped direct. A good few...
  7. Pat H

    lid for this old consumer unit ?

    I'd agree, its old and brittle. But a simple fix would be a rectangle of clear plastic and just glue it inside the old cover to support it.
  8. Pat H

    NICEIC Certification Scheme NICEIC Approved Contractor Scheme

    I'd go domestic and get that sorted and then look at going the approved contractor route. I was due to have my NICEIC assessment end of last year but had to defer it as too busy. Now looking at Stroma which is cheaper and I don't need a lot of what NICEIC offers.
  9. Pat H

    Circuit Breakers

    Thanks Richard a very clear explanation. I often find myself explaining it (not as well) as its easy for it to "appear" as if the correction factors are increasing the current in the cable rather than indicating a cable CSA size that will be ok with those correction factors at that current.
  10. Pat H

    12v Dual Supply Relay Problem

    To avoid any disruption during any potential automatic switch over of supply isn't it easier to just run the 12V DC to mains continually and just use the mains to charge the 12V battery. If the 12V battery is under load then the incoming mains charge will increase. This is effectively a UPS...
  11. Pat H

    NICEIC Certification Scheme NICEIC Approved Contractor Scheme

    I've had conversations with the NICEIC and they were happy to use current work completed as part of the assessment and then allow you to notify via them for those jobs. (assuming they accept you of course)
  12. Pat H

    Electrical fire

    Hard to imagine a clock radio not blasting out loud music was generating so much heat it could catch fire. How bright was the LED display? 100W. Clearly if its the clock radio there is a design issue. Anything that can draw enough current to catch fire is lacking current limiting protection or...
  13. Pat H

    Circuit Breakers

    It is an odd way of calculating things. A cable that is in insulation has a de-rating factor. But what actually happens is the cable will heat up and its resistance increase. So the current flowing will actually drop (voltage is nominal and fixed). However based on our de-rating value and...
  14. Pat H

    Electrical fire

    Theres a 4 way extension lead there as well.
  15. Pat H

    Happy new year

    All the best for 2017. An interesting year for sure.
  16. Pat H

    Series parralell ?

    Good controllers are worth it as they do a better job of converting low output into usable voltage.
  17. Pat H

    Series parralell ?

    Do the panels have reverse voltage diodes fitted? They need to have to prevent one panel feeding back into the others. What sort of controller have you got?
  18. Pat H

    Samsung Fast charging Pad

    I've got one of these. 2 in 1 Qi 10000mAh Wireless Charger Charging Pad Portable USB Power Bank Battery | eBay - http://www.ebay.co.uk/itm/2-in-1-Qi-10000mAh-Wireless-Charger-Charging-Pad-Portable-USB-Power-Bank-Battery-/112126880230?var=&hash=item1a1b4869e6:m:mDnMlcLoYrwER2IfOnTUJjQ You...
  19. Pat H

    Fans and ohm's law

    The key points are: You need a fixed voltage of 12V DC The power supply needs to be able to deliver the required power or more and be able to deliver the voltage at an output current as needed for the fan (as mentioned some PSUs need a minimum load to deliver an output) You can't really use...
  20. Pat H

    eicr coding question

    For a C1 or C2 you need a reg to refer to so I'd go with C3 and a comment.
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