The Use Of 1.0mm T + E In Domestic Lighting Circuits and 5 amp SO's

Discussion in 'Electricians' Talk' started by JP., Jan 24, 2018.

  1. Coloumb

    Coloumb Screwfix Select

    If 1mm is 16a clipped direct I would have though .5mm for the same method would be half that though, 8a so in air 10a. Weird that table tbh.
     
  2. Pollowick

    Pollowick Screwfix Select

    Given that it is likely to be lighting and under insulation, is clipped direct appropriate? I would suggest the conduit/insulated would be a better rating.
     
  3. Coloumb

    Coloumb Screwfix Select

    Sure, but on the other hand but I've never come across a 2 floor house that uses insulation in the ground floor ceilings...new builds maybe? That was my line of thinking anyway.
     
  4. Pollowick

    Pollowick Screwfix Select

    New build and extensions. Just looking at plans for one big extension and that requires it - possibly noise rather than heat but given that there is little difference between them, then you need to consider it "insulation".
     
  5. sparky Si-Fi

    sparky Si-Fi Screwfix Select

    New build stuff and alterations and additions and even de-rating 1 mm it will sit there all day on a 6A

    That will do me.
     
  6. unphased

    unphased Screwfix Select

    Much cheaper though if you are rewiring hundreds of houses a year...which I am not.
     
  7. unphased

    unphased Screwfix Select

    1 mm2 is too flimsy? Eh?
     
  8. seneca

    seneca Screwfix Select

    Another thread which is becoming ridiculous, there's absolutely nothing wrong with 1.00 mm t/e on a 6 amp mcb in a domestic environment.
     
    leesparkykent and unphased like this.
  9. GavP

    GavP New Member

    Ive used 1mm for the last 10 years and never had an issue. Regarding volt drop if circuits are designed well and split into various circuits I don' see an issue. Regarding fittings now everything should really be led so load so low. I see the point of term screws biting through cores but I've never had any issues as I always double over the cores. Really can' see the point in struggling to get 1.5mm in back boxes tbh nothing to do with cost, all I know is we mainly fit recessed downlights and 1mm is far far easier to work with
     
  10. leesparkykent

    leesparkykent Well-Known Member

    I bet wholesalers sell more 1mm twin skin that 1.5mm.
     
  11. JP.

    JP. Screwfix Select

    I'm actually looking forward to using 1mm now for lighting, however will still use 1.5mm for security and 5 amp so circuits.
     
  12. I have yet to meet an Electrician who uses 1.0mm t&e or a job where it has been specified.
     
  13. Sparkielev

    Sparkielev Screwfix Select

    Been using it for a few year esp with spotlights
     
  14. unphased

    unphased Screwfix Select

    I use it on house rewires. There is no reason not to use it.
     
  15. Bazza-spark

    Bazza-spark Screwfix Select

    1.0mm for lights since 1970's. Never a problem. 1.5mm for immersion heaters. 2.5mm for ring finals.

    Kind regards
     
  16. leesparkykent

    leesparkykent Well-Known Member

    There is 7 on this very thread .
     
  17. leesparkykent

    leesparkykent Well-Known Member

    As for 1mm being to flimsy.....You must be an absolute Leanderthal with a screwdriver.
     
  18. unphased

    unphased Screwfix Select

    No, Bazza, 2.5mm2 for immersion heaters..
     
  19. Bazza-spark

    Bazza-spark Screwfix Select

    Always used to be 1.5 Un. That was the only thing 1.5 was ever used for.

    Kind regards
     
  20. I have never said it was not suitable,but I much prefer using 1.5.
     

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