10.5kw shower wired in 10mm twin n earth on a 40A breaker a problem

[giddash]

Hi there,
I did wired 10.5kw shower with a 10mm cable on a 40A breaker for an old lady's bathroom.she recently got a builder in to do some tiling work and this guy thinks the wiring is wrong and that i should have use 45A breaker else the house will catch fire.I don't think his is right as there no way this could happen as I did test the breaker and it tripped in less than 5s but tought i should post this any way.

 

[electric will]

I'm sure a 10.5 kw would be fine on a 40. Think you'd need to have the shower running a fair while to trip it. I wanna now why I can't test a mcb.

 

[ExArmy]

i see downrating of MCB's quite alot, wouldn't even code it tbh. i wouldn't design it like that either, whenever i find it it's been like that for years and you know the old saying, if it aint broke don't fix it. if i remember correctly a modern MCB will trip at 1.45 times the rated current. so thats 58A for a 40A breaker, i think it will be alright

 

[Des 56]

Testing an mcb is like seeing how long your tent would cope for in a Hurricane,
Apply a 150 mph wind and the tent gets destroyed after staying up for a second
The tent may have passed the test, but its not a lot of good for sleeping under again lol

And these shower ratings are sometimes a bit of an exaggeration

 

[davewdave]

im considering putting my 10.5kw shower on a 40a rcbo, 1 because they dont do bigger in crabtree and 2 because i dont want to buy a seperate shower unit of 63a rcd with 50a mcb....if it trips then ill have to change it but if anything its safer.......

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im considering putting my 10.5kw shower on a 40a rcbo, 1 because they dont do bigger in crabtree and 2 because i dont want to buy a seperate shower unit of 63a rcd with 50a mcb....if it trips then ill have to change it but if anything its safer.......

 

[Engineer54]

davewdave;748232]im considering putting my 10.5kw shower on a 40a rcbo, 1 because they dont do bigger in crabtree and 2 because i dont want to buy a seperate shower unit of 63a rcd with 50a mcb....if it trips then ill have to change it but if anything its safer.......

I can't understand why anyone would even consider installing a 10.5 KW shower, let alone actually installing one!! lol!!

 

[GLENNSPARK]

I can't understand why anyone would even consider installing a 10.5 KW shower, let alone actually installing one!! lol!!

its a modern phenomena eng called `my showers bigger than yours` at the neighbours...
a bit like the `chicken brick` that used to be sold by habitat back in the late 70s early 80s...so all the street would come round to admire it...a stoneware pot you cooked a chicken in...
anyway...the point is some feel the need to have the best kitchen, biggest shower,sparklyest bathroom etc...
these people need patience and understanding.....

 

[Guitarist]

im considering putting my 10.5kw shower on a 40a rcbo, 1 because they dont do bigger in crabtree and 2 because i dont want to buy a seperate shower unit of 63a rcd with 50a mcb....if it trips then ill have to change it but if anything its safer.......

Are you an electrician Dave?

 

[Jay Sparks]

its a modern phenomena eng called `my showers bigger than yours` at the neighbours...
a bit like the `chicken brick` that used to be sold by habitat back in the late 70s early 80s...so all the street would come round to admire it...a stoneware pot you cooked a chicken in...
anyway...the point is some feel the need to have the best kitchen, biggest shower,sparklyest bathroom etc...
these people need patience and understanding.....

They need a good kickin Glen......My wife is exactly the same, she has to have better than my cousins missus.....She needs a good kickin aswell!!lol

 

[telectrix]

these people need patience and understanding.....


straitjacket is the word i'd use.

 

[Jay Sparks]

Are you an electrician Dave?

Well if he isnt, he shouldnt be in the Arms!!! The Mods may have dropped a clanger.lol

 

[Guitarist]

Well if he isnt, he shouldnt be in the Arms!!! The Mods may have dropped a clanger.lol

Are we in the Arms?

 

[telectrix]

nope...we're in the shower room.

 

[Geordie Spark]

nope...we're in the shower room.

Who's turn is it to pick up the soap?? :38:

 

[pencilpusher]

Who's turn is it to pick up the soap?? :38:

With you lot in here, I am only prepared to pick it up with my toes! :earmuffs:

 

[Guest55]

it wouldnt be a bank holiday without a forum shower debate.
goes hand in hand with the crap weather and usual traffic jams lol.
;-)