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  1. spark 68

    Dodgy trade pictures for your amusement! - 1 Million Views!

    You would have to ask the suppliers of said cabins that question :)
  2. spark 68

    How to test a circuits in steel conduit as the cpc

    I could dig them out Westy, but what do you make of the second part of reducing disconnection times ? this part has nothing to do with Ut or special locations.
  3. spark 68

    How to test a circuits in steel conduit as the cpc

    There are basically two reasons for SB, the special locations part is to do with reducing Ut to keep it below 50V, medical locations below 25V, back in the 16th agricultural locations required Ut below 25V as well I recall, but I don't recall now which specific amd, or if it ever changed in that...
  4. spark 68

    How to test a circuits in steel conduit as the cpc

    So Ian, are you saying in effect that SB can be used to lower a Zs to achieve disconnection times ?, I do have the 18th regs book but I am just being lazy ;) I don't have the 18th GNs yet, but I am considering getting them
  5. spark 68

    How to test a circuits in steel conduit as the cpc

    Cheers, Spin, I have the earlier 16th ed regs books and the last brown book (2004) of that edition and I will if I can be bothered look that up.
  6. spark 68

    How to test a circuits in steel conduit as the cpc

    Just out of (genuine) interest Westy can you give me the reg number for the 16th where SB was not allowed to reduce a Zs ?, I still have regs books and some OSGs going back to the 15th ed and I will look it up. The special locations bit in my previous post, which I never bothered writing out is...
  7. spark 68

    How to test a circuits in steel conduit as the cpc

    In the 17th GN8 amd3 (which is the last GN series I currently have) it gives reg 411.3.2.6 and states "Supplementary bonding is required by BS7671 to be provided in the following circumstances: where, in the event of an Earth fault, the conditions for automatic disconnection cannot be fulfilled...
  8. spark 68

    How to test a circuits in steel conduit as the cpc

    Supplementary Bonding is still valid in the 18th, see reg group 544.2
  9. spark 68

    Dodgy trade pictures for your amusement! - 1 Million Views!

    I have seen CUs installed like that on pre-wired portacabin office type buildings.
  10. spark 68

    18th Edition Compliant Consumer Unit

    Don't give them any ideas Spin ;) that will be in a future amd
  11. spark 68

    Fluke Phase Rotation Testing help

    More correctly as phase sequence ;)
  12. spark 68

    Advice wanted - unhappy with rewire

    Exactly Des, If the spark had charged on the low side it would have been pay peanuts yada yada, if he had charged high then it would have been rip-off merchant, I don't see how the electrical firm could have won a fair trial on here :( the plasterer looked crap but I digress, Essex knows F-all...
  13. spark 68

    Touring Caravan dno connection

    How Ya doin' HT ? :D another resurrection of old sparks FFS nice to see you again :cool:
  14. spark 68

    2.5mm Ring wired off a 4mm Radial

    It may cause some confusion in domestic as it is not in the OSG ;) nor in app15 pics in the regs book ;), and wasn't really seen that much in that environment until fairly recently (more frequent kitchen re-fits ?) , however in the industrial/commercial world it has been around for almost ever...
  15. spark 68

    2.5mm Ring wired off a 4mm Radial

    Just for further information regarding Testing/certifying 'lollipop' circuits here is Voltimums take on it. Common issues relating to hybrid ring/radial final circuits - https://www.voltimum.co.uk/articles/common-issues-relating-hybrid
  16. spark 68

    2.5mm Ring wired off a 4mm Radial

    In domestic it tends to be done when only the kitchen is refurbed, usually repurposing the 6mm^ feed that was formerly used for the electric cooker circuit , save ripping the rest of the house apart. In Industrial/commercial it may be done for volt drop/max Zs reasons using a larger feeder...
  17. spark 68

    Vacuum and compressor automation

    Interesting and fascinating discussion about CE marking and EN standards as ever chaps :) however the OPs location is given as South Africa, I don't think any of these directives apply to him :cool:, no doubt similar national/international equivalent standards do though. :rolleyes:
  18. spark 68

    Fuse Constantly Tripping

    At least they didn't do what one spark did to a friend of mine :mad:namely told the customer they had a "faulty Earth" :mad::eek: and promptly disconnected it (CPCs) from a S/O :mad:, I got involved later when instead of the RCD (split load board) tripping the fault resulted in the MCB tripping...
  19. spark 68

    Advice wanted - unhappy with rewire

    @ Essex, Hi Neill hope you are playing nice :)
  20. spark 68

    18th Edition Compliant Consumer Unit

    I did not say that all, I suggest you re- read what I actually said, your last post was pretty much incomprehensible

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