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

Aaronj46

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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!
 

Taylortwocities

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What do your cable calculations say about having a B50 on the 10mm cable, given the installation method?
 

telectrix

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who in their right mind wants a long shower? in, wet, soap, rinse, out for some beer. 5 minutes tops.
 

Spoon

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I'm with Post #2...
 

telectrix

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I,m with RBS.
 

Andy78

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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!
Cost ? £20 to do the job properly ?

No idea as only you know the routes and installation methods and the derating factors involved.
 

Spoon

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My 16 YO daughter, for one. the Megaflo is 210 litres, but she can run it cold......:mad::mad::mad:
Disconnect shower and tell her to have a bath... that will save you a bit.
 

essex

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Shower room circuits should have RCD protection anyway.
 

Pete999

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who in their right mind wants a long shower? in, wet, soap, rinse, out for some beer. 5 minutes tops.
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.
 

Spoon

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Turn it on, run about for a bit you won't need a towel then
What are you doing??????? I now have an image of you all wet, running around naked.... I need a 'Delete' button....
 

telectrix

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What are you doing??????? I now have an image of you all wet, running around naked.... I need a 'Delete' button....
just send him an invite to survey the nursing home.:D:D:D.
 

Wilko

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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.
 

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