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  1. S

    Cable calculation

    Would you agree?
  2. S

    Cable calculation

    2 core single phase 3%
  3. S

    Cable calculation

    Taking that the Ib is 60amps (k.m.f il install with bs1361 60amp fuse in it) distance of 80 metres will be 35mm swa having a volt drop of 6v. I believe this to be the correct size, correct me if im wrong
  4. S

    Cable calculation

    I agree PME is the way to go, like you say especially if livestock can come into contact with the installation
  5. S

    Cable calculation

    I see where your coming from but lets say you loose your pen conductor at the very source from the transformer. Not at the point at which you make it a tncs when connecting your earth. But the very source. If that pen conductor goes down, where is your mean of earth?
  6. S

    Cable calculation

    Reg 705.411.4 says a tnc shall not be used. Other words a PEN conductor cannot be used. Meaning seperate earth shall be used, example tt sytem.
  7. S

    Cable calculation

    Tncs cannot be used.
  8. S

    Cable calculation

    Yeah i agree they are essentially the same
  9. S

    Cable calculation

    Special location,
  10. S

    Cable calculation

    I did say i was working on a stables
  11. S

    Cable calculation

    Section 705 705.411.4 Read that little paragraph mate, starts with tncs shall not be used. I dont make the regs, it was a question i had of the nic eic on the onsite assessment
  12. S

    Cable calculation

    Section 705 705.411.4 Read that little paragraph mate, starts with tncs shall not be used.
  13. S

    Cable calculation

    Ok lets say you exported the earth on a tncs to an outbuilding, and then lets say you lost your neutral at the main incoming, if you had a live to earth or neutral short, every thing connected to earth would become live under fault conditions, hence why you need to rod and not export form the...
  14. S

    Cable calculation

    Under the Electricity safety, quality and continuity regulations 2002 you cannot use a suppliers earth to an out building, on a TNC-S Earthing arrangement, so the detached garage effectively becomes a TT installation with an earth electrode installed in the ground.
  15. S

    Cable calculation

    For the reasons ive just said it in the regs mate
  16. S

    Cable calculation

    So why is this done out there, having main switch on the board rated higher than the fise in the head, it dont make sense the fuse in the head would alway blow first.
  17. S

    Cable calculation

    Typo- main switch wouldnt trip,
  18. S

    Cable calculation

    What makes you say that Yes wouldnt, typo my bad
  19. S

    Cable calculation

    What makes you say that
  20. S

    Cable calculation

    Not allowed to export the earth. Think about it, if you loose your neutral on the main, youve also lost your earth, so anybout building ect will not be earthed

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