7.5KW shower with 6mm cable

[La Poste]

Greetings.
Just had the upstairs shower die, water is leaking all over the place and it is highly dangerous.
We have a 6mm cable fused at 32A at the CU with no RCD.
My father is a real difficult old bloke of 85 years and whenever I try to tell him about RCD's and new fuse boards he gets really angry like I am trying to cheat him out of money.
All I can see available are 7.5 KW showers these days, can't seem to find a 7KW one.
I think I am right in assuming a 7.5KW shower should be fused at 40A.
Do you think the 6mm cable will be allright as it is with no need to fit a new cable?
It seems really borderline to me, cable is surface clipped up to the loft then it drops down to behind the upstairs shower. Cable run is about 15 metres.
An RCD in its own enclosure seems the only way to do this as a new fuse board is out of the question.
Any opinions?
Thanks.

 

[Zerax]

Have you looked at something like this... https://www.meteorelectrical.com/di...GO-LqjyCnA_JpLvnUD-pNtaXjYKJzcssaAmoCEALw_wcB

 

[nickdnew]

Have you looked at something like this... https://www.meteorelectrical.com/di...GO-LqjyCnA_JpLvnUD-pNtaXjYKJzcssaAmoCEALw_wcB

Excellent. Many thanks for the prompt reply. This looks like the ideal solution. Although a little more expensive then a 3 Pole Change Over Switch this is automatic so worth the expense.

 

[littlespark]

New record? 10 year old thread.

 

[JBW175]

New record? 10 year old thread.

and for that, I've gave him a winners medal... :-D

 

[Lister1987]

Garro do a changeover device in its own enclosure and you can set priority to either side, might be worth a look

 

[nickdnew]

Garro do a changeover device in its own enclosure and you can set priority to either side, might be worth a look

Thanks, this is the same one as the link sent to me by Zerax. I'm guessing that the same principle but not automatic, would be to use a 40 or 32 amp normally closed contactor. I can find a 40a NO contactor but not a 40a or 32a NC contactor.

 

[nickdnew]

Found one, but not much difference in price.

https://www.cef.co.uk/catalogue/pro...W_gFVVAuRhOAe947-DQaAkXSEALw_wcB&gclsrc=aw.ds

 

[nickdnew]

Ok, found a cheaper 2 pole one at £35. Just wondering if it would pass an EICR as you would need a 1.5mm cable running back from the isolating switch for the shower to the consumer unit wired into the contactor.