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  1. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    I can't tell you the complete laws of thermal dynamics or heat transference. It is like that at the switch and 30cm up from the switch. I ve seen quite a few instances of heat damaged cables the fishy smell is present
  2. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    I've seen it smelt it and felt it, the live into switch burnt as well as the switch burnt. That is not tar that is the cable overheating
  3. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    Sorry typing on phone is quite hard I should really proof read what I write that should have been if I'm asked to rewire I can show you. It's interesting the number of sparks that are defensive of 9.5kw on 6.0mm. If it is designed and calculated right that's fine. Me personally I err on the...
  4. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    If I'm asled to take it out ill show you I have a pic of part of the burnt cable that I pulled down when visually insolpecting
  5. 20161202_095242.jpg

    20161202_095242.jpg

    • gooner80
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  6. 20161202_095242.jpg

    20161202_095242.jpg

    • gooner80
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  7. 20161202_095242.jpg

    20161202_095242.jpg

    • gooner80
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  8. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    Yes I recommended to either change shower or upgrade the cable my poin was I was about to have a debate about downgrading rcbo wouldn't be sufficient. If cable wasn't damaged
  9. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    Ir was on load side disconnected. the switch was damaged thus no trip.
  10. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    Hi I know how to apply rating factors my question is about Iz being lower than Ib and a mcb allowing 1.45 times overload
  11. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    It goes through loft insulation for 3metres that was enough for me, didn't check what kind of wall it was on vertical run down to consumer unit. My question is more about a fixed loaf with a design current in this case 9500watts/230 and the current carrying capacity of the cable being below Ib...
  12. G

    Downgrading MCB to protect cable but has fixed load greater than IZ

    Hi Guys I know showers have been extensively covered on here, but this this is a slightly different question. went to a job to replace 45amp shower switch, I noticed cable was damaged by heat, first thought maybe loose connection, so I started investigating, I noticed a 9.5kw shower on 6.00mm...
  13. G

    EICR Sampling AND breaking dilema

    Hi Guys first time poster long time reader I have been testing and inspecting existing installations for about 10 months now, all for the council, I have agreed to sample 10% of accessories, and as I regularly read over Guidance note 3 to keep me refreshed off the top of my head it says...
    • gooner80
    • Thread
    • breaking damage eicr electricians' talk installation installations sample
    • Replies: 4
    • Forum: UK Electrical Forum

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