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Discuss 10.5KW shower 10mm stud wall query? in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

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  1. Aaronj46
    Offline

    Aaronj46 Regular EF Member

    Location:
    South derbyshire
    So I have been working on a contract installing 10.5kw showers with B40 MCB's as specified by builders but occasionally a plot reports the shower tripping when having long showers. Hager don't do a 45A MCB but do a 45A RCBO but then its the cost....£££

    The cable is ran in uninsulated studwork for around 9metres to the isolator and then around 4metres to go into loft and back down. Is there a way a I can justify a B50?

    Any suggestions would be much appreciated!
     
  2. Taylortwocities
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    Taylortwocities Electrician's Arms

    Location:
    Oxfordshire
    What do your cable calculations say about having a B50 on the 10mm cable, given the installation method?
     
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  3. telectrix
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    telectrix Scouser and Proud of It Respected Member

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    who in their right mind wants a long shower? in, wet, soap, rinse, out for some beer. 5 minutes tops.
     
  4. Taylortwocities
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    Taylortwocities Electrician's Arms

    Location:
    Oxfordshire
    My 16 YO daughter, for one. the Megaflo is 210 litres, but she can run it cold......:mad::mad::mad:
     
  5. Spoon
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    Spoon Forum Mentor

    Location:
    Lancashire
    I'm with Post #2...
     
  6. telectrix
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    telectrix Scouser and Proud of It Respected Member

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    I,m with RBS.
     
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  7. Andy78
    Online

    Andy78 Respected Member

    Location:
    Kingston upon Hull
    Cost ? £20 to do the job properly ?

    No idea as only you know the routes and installation methods and the derating factors involved.
     
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  8. Spoon
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    Spoon Forum Mentor

    Location:
    Lancashire
    Disconnect shower and tell her to have a bath... that will save you a bit.
     
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  9. essex
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    essex Forum Mentor

    Location:
    Wiltshire
    Shower room circuits should have RCD protection anyway.
     
  10. Pete999
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    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    Turn it on, run about for a bit you won't need a towel then, the builder specified the MCB let him sort it Mate, Although wonder how much he knows about electrics, probably specified from memory, oh that's what most shower installs consist of.
     
  11. Spoon
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    Spoon Forum Mentor

    Location:
    Lancashire
    What are you doing??????? I now have an image of you all wet, running around naked.... I need a 'Delete' button....
     
  12. telectrix
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    telectrix Scouser and Proud of It Respected Member

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    just send him an invite to survey the nursing home.:D:D:D.
     
  13. Wilko
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    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    Hi - what size are the conductors? If you're using 6mm then 50A is a definite no. If there's no faults, I'd replace the mcb and see if it stops tripping.
     
  14. Taylortwocities
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    Taylortwocities Electrician's Arms

    Location:
    Oxfordshire
    The title to the thread reveals this, I think…?
     
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  15. Spoon
    Offline

    Spoon Forum Mentor

    Location:
    Lancashire
    or he has very thin stud walls..... :)
     
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