6mm for 9.5 shower??

[pennywise]

No offense taken, i do understand people can take things very literally if it suits them and can be misdirected with information that doesn't directly relate to their situation. In most cases it is probably easier to give less choices on solutions and always advise for the worst case scenario. cheers

 

[Spudnik]

i am having to put in a 16mm for a 10.5 shower as its all in insulated walls

Now THAT i would like to see pics of when you are done

As for the OP, i reckon 6mm with a 32A mcb would just about be ok.

 

[c.boy]

As i thought!!! the shower is already bought, few month back!!!and the shop aint changing it!!a did say buy a 8kw but fell on deaf ears!!! so be it,they will have to get me some 10mm then.thanks to all!!!

 

[the jock]

fitted a 9.5kw shower instructions said it should be fitted on 40A breaker
so did this and it kept trippin

manufacturer said they are changing their booklet to advise 45A breaker

6mm cable can only carry 42 amps

so anything above 8.5 kw fit a 10 mm cable

 

[IrishSparks]

Its code over here that you have to put a 40amp combi on a shower circuit,it use to be just a 32amp MCB,whats the code in the UK?

 

[Dannyg83]

10 mm all the way

 

[Tapouchoke]

No No No Cost Should No Come Into It Do the Job Properly Or Let Them Get A Cowboy To Do It
If It Melts Over Time its On Your Head

 

[Darkwood]

No No No Cost Should No Come Into It Do the Job Properly Or Let Them Get A Cowboy To Do It
If It Melts Over Time its On Your Head

In reality regs are regs but in the real world no one has a shower for more than say an hour and the regs are guided to constant load 24hrs of load on a cable so even if the cable was undersized say 6mm instead of 10mm its wouldn't gain sufficient heat to melt it and its rated to carry said current up to 70 degrees C for standard twin and earth but still must agree that this should never be considered when choosing a cable size in this case.

 

[the jock]

that maybe ok for the first month then

the connection gets a little loose ect ect

seen too many showers after 3 or 4 years with heavy burn marks in side

the bigger the better

 

[Darkwood]

Good point there Jock quite an oversight when writing but in my defence i was totally ratarsed lol when writing that,
NOTE TO SELF :-
Dont mix beer and electric

 

[andyb]

that maybe ok for the first month then

the connection gets a little loose ect ect

seen too many showers after 3 or 4 years with heavy burn marks in side

the bigger the better

If the conections become loose there would be a problem whatever size conductor is used.

 

[JonAW]

I would always advise to check all the factory terminations inside the shower as well. I'ver replaced a few showers fitted by other people because the factory terminations weren't great.

 

[tenheads]

just thought id tell you all about a mate of mine who fitted a shower in his sisters house i tried to advise him but he knew it all you know the type, a few days after he had fitted this shower got a call from his sister breaker tripping, rcd bouncing its nuts off so went round went straight for the shower, wired in 1.5 t+e went in the loft and there the cable looked like a gunpowder trail burnt to a crisp i think the only thing that stopped the house going up was the fact that the loft had been newly insulated so there was nothing combustible around ...as for the cable 10mm all day

 

[scotsparky]

Now THAT i would like to see pics of when you are done

As for the OP, i reckon 6mm with a 32A mcb would just about be ok.

got out of it its a council house so they are having to do it as well asfixing broken sockets and the light switch in the bathroom

 

[andekoch]

always make sure the cable can handle more than the MCB/ fuse that is protecting it, then how it is reouted and finally the volt drop before deciding on the size. 9.5kw is 38-41 amps so likely to be a 40 amp mcb and unlikely to be a nice cliped direct or embedded inplaster route so probably 10mm although if all checks out re the routing and the volt drop then 6mm will be ok but check on site. be particularily aware of insulation and how much it derates the cables (quite alarming really).