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Recommended checks before CU change

Former Community Member
Former Community Member
As most of you know I’ve only been qualified for just over a year and I’ve got a quote to do for a cu upgrade.


I know I’m nowhere experienced enough to do EICR’s yet, but what would you guys recommend I check/test before doing the cu upgrade and should I do these checks/tests at the quote stage?
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    Fitzy71:

    So all connected loads including ALL the luminaries would’ve caused the low .42Mohms readings?



    Unlikely. A single neon is tens of kohms. The more loads you have, the lower the resistance.

    I did how ever get my first electric shock ‘TWICE’, as I was holding the L cables in the mcb holder to tighten the little screws, my little finger brushed the incoming Live tail.  Does that make me a proper sparkie now then?  ? ? ?

    Have you put your foot through a ceiling yet? 


    More seriously, much more seriously, no live conductor should have exposed copper. Assuming that your pinky is a normal size, that implies that there is a significant amount of copper exposed.
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  • 0

    Fitzy71:

    So all connected loads including ALL the luminaries would’ve caused the low .42Mohms readings?



    Unlikely. A single neon is tens of kohms. The more loads you have, the lower the resistance.

    I did how ever get my first electric shock ‘TWICE’, as I was holding the L cables in the mcb holder to tighten the little screws, my little finger brushed the incoming Live tail.  Does that make me a proper sparkie now then?  ? ? ?

    Have you put your foot through a ceiling yet? 


    More seriously, much more seriously, no live conductor should have exposed copper. Assuming that your pinky is a normal size, that implies that there is a significant amount of copper exposed.
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