Recent content by CM 1

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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    If the cable is clipped direct then it’s fine on a 40amp mcb It’s when it’s run through floor and roof voids it gets complicated! A 40 amp mcb does not protect the cable , a 32 will, but the load of the shower will cause a thermal effect on the cable and the MCB, HOWEVER both MCB and cable are...
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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    That only applies if clipped direct , none are always underfloor and through roof! I still think 32 amp MCB is safe until shower circuit is rewired which was the point I was trying to make ?
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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    :kissingsmiling:
  4. C

    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    Yes but a 32 amp mcb will take that for an hour plus
  5. C

    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    The problem here is the short time the shower operates for, Years ago our company added lots of heaters to a ring main in a school, despite me protesting as the QS that it was non compliant, and should be on a dedicated ring or radial circuits, every winter the circuit would trip after about 6...
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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    They believe it should be a C3
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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    My own shower is a 9.5 kw on a 32 and 6.0mm , never trips no signs of damage , cable might be stressed but aren’t we all?
  8. C

    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    Wanted to see what others reckoned as many at our place don’t agree?
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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    We do over a thousand tests for local authorities and we can return a C3 as satisfactory with an advisory to rewire the shower as opposed to a C2 failure It makes a big difference if we send back satisfactory cert! By the way the NICEIC say the 32amp MCB is a C3
  10. C

    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    trying for a C3 as opposed to a C2 I believe by down rating the MCB and advising our client of the need for it to be rewired when possible we are complying
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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    I agree if new installation , but on an EICR i believe it would be a C2 with the 40 amp mcb and unsatisfactory but with the 32 it would reduce to a C3 and would put a note that needed rewiring when possible?
  12. C

    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    No need for either in my opinion , as cable needs to be able to take 1.45 rated current without exceeding 60deg C, also MCB will take the current for over an hour
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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    Lol! Definitely not safe on fuse wire , but on an MCB I think it’s ok as the only problem would be possible tripping if a V long shower was taken
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    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    I would say it’s safe on the 32 though as we do say if the shower trips we would rewire the circuit?
  15. C

    Shower EICR Code- 9.5kW- 40amp mcb!. De rate MCB to 32 or rewire cable to 10mm

    We would never justify fitting a lower powered shower as many properties tested have this problem , and we may have fitted the showers previously lol

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