cable for shower

[anubis68]

i have a 9.5 KW shower to put in but to run a 100mm cable would mean lifting carpets and floorboards in 3 room to get it anywhere near the fuse box and was wondering could i tap into the heating boiler fuse switch which is 13 amp then to a RCD consumer unit with a 40 amp MCB then to the shower?

 

[sparkwright]

NO NO NO.


and its 10.0 mm.

 

[Chri5]

i have a 9.5 KW shower to put in but to run a 100mm cable would mean lifting carpets and floorboards in 3 room to get it anywhere near the fuse box and was wondering could i tap into the heating boiler fuse switch which is 13 amp then to a RCD consumer unit with a 40 amp MCB then to the shower?

Your post clearly identifies that you don't understand very much regarding electrical loads- please employ someone who does !

A 9.5kw shower divided by 230v gives a load of 41 amps. So how you 'think' tapping in to a 13 amp circuit will help is beyond sensible comprehension.

Depending on cable run length and method of installation (surface clipped, buried in plaster, in insulation etc) I'd suggest a 10mm cable as an absolute minimum- it may well be a 16mm cable.

 

[anubis68]

thanks for the reply mate i mean 10 mm slip of the finger lol

 

[ban-all-sheds]

i have a 9.5 KW shower to put in but to run a 100mm cable would mean lifting carpets and floorboards in 3 room to get it anywhere near the fuse box

That's what you'll have to do, then.

How do you plan to carry out tests on the circuit before putting it into use?

Have you worked out that the capacity of 10mm² cable will be OK given the installation method which will apply, and any other de-rating factors?

And that volt-drop will be within limits?

Do you know the rules for concealed cables?

Ditto RCD protection?

Ditto supplementary equipotential bonding?

Ditto accessories and appliances in bathroom zones?

Have you checked that your earthing and main bonding is up to scratch?

Have you applied to your local council's Building Control dept for approval yet?

 

[xr4x4]

are you replacing or installing new?

 

[JBPElectrics]

Of all the circuits in the house, this is the one to get done properly!

All said and done it will probably cost little more than you would pay for a good powershower to have a local electrician instal the new circuit, RCD protect it, check your current earth and notify building control.

Could go very wrong with a shower!

CBW