New Shower?


Hi Guys, I have a Triton Bermuda 9.5Kw shower that must be at least 15 years old. It has developed a fault in that the water never gets really hot. When the temperature dial is right up to No. 10 the water is only 'warm', you can quite easily hold your hand under it.
There is obviously power getting to it as the light comes on and the water gets hotter than if the power is off. Any ideas as to the fault and remedy, or as I suspect is it a chuck it and renew. As the shower is now obsolete how can I find one with the same / similar water and electric entry points, as the pipe and cable are behind a tiled wall (not a Plasterboard one either!).
Whilst on the subject the circuit breaker in the CU is 32A is this OK, and how can I check the mm^ of the cable, it is a lot thicker than 2.5mm^ will it be 6 or 10mm^ (and which should it be)?
Cheers
John
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If it is the flat T&E then it is usually embossed on the flat of the outer jacket every so often.
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John wrote:

This maybe of some help to you, the triton Caselona shower we had gave up outside warranty, I tried searching tritons website for install manuals to see if they made any with the same service entry points, well they dont seem to, my old triton has the mains feed on the lower left side and the water feed on the lower right side, I was about to give up and faced the possibility of altering one of the services and popping on a new tile or three.
I went to argos and got the Triton Madrid II 8.5kW as a replacement, when I looked inside its the same design as the old Caselona, saved me a bit of work, so if your old shower has the same service entry points as mine then the Madrid II should fit it. If not, have a look at the install manuals on tritons website.
-- Mart
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Using the links provided by John Rumm I think my cable is 6mm^. The measurements over the PVC sheath is 14mm x 7mm and the red & black insulation measure 5mm on the outside. Thanks Fred for your advice but I can't even see the microswitches never mind test them!! They are (according to a web forum) next to the temperature adjuster but I cannot see them. Bearing in mind the possible age of the unit I think better to change it.
Without changing the wiring (6mm^) or the breaker (32A) what is the largest Kw shower I can safely install, the existing shower (9.5Kw) has operated almost twice daily for at least the last 8 years without any tripping etc. Also with all this Part P c**p can I swap the unit DIY or do I need to have it 'professionally' installed? I know I can swap light fittings, swich plates, etc. like for like, but are showers covered differently due to water and electricity in the same unit?
Thanks
John
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I have a Triton T100E shower installed in 1988. It has packed up a couple of times since then and consequently a nice man from Triton has come and put in a new circuit board a couple of times. Also, I live in an area where limescale is a big problem and it was this that was causing my water to either run scalding hot or else cold. I put on a new shower head and that problem was solved. I descale regularly now.
Your shower is a Triton Bermuda, maybe you just need a new circuit board:
http://www.showerdoc.co.uk/shower-spares/triton/bermuda.html
I found the company friendly and helpful. You could contact them about your problem.
HTH, someone
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John wrote:

Well the "correct" answer would be up to 32A - or about 7.5 kW. This is dictated by the MCB rating - the cable can probably take more however.
To decide the cable rating you need to consider the possible factors that will have an effect on its maximum current rating:
How long is the cable run? How is is mounted? (i.e. is is clipped to a surface, buried in plaster, buried in insulation etc? Does it pass through any areas of high ambient temperature? Is it closely bunched with other cables for any of the run?
The current carrying capacity table here:
http://wiki.diyfaq.org.uk/index.php?title bles#T.26E
Shows that in ideal circumstances (say clipped to a surface or chased into a plaster wall a 6mm^2 cable could carry 47A, or in the worst case (buried under a mountain of loft insulation say) it could be as low as 27A - and that assumes no other factors need to be accounted for.

Contrary to popular expectation, a 32A type B breaker will usually carry 40A indefinitely. Even 50A could take 15 mins to cause a trip. So tripping would not be expected at that sort of load.

You can quite legitimately swap a shower "like for like" - reusing the same cable and breaker so long as it is appropriate for the shower.
You have the minor complication that your breaker is not really appropriate for the shower however!
Personally I would uprate the breaker to something more appropriate (assuming the cable is still in spec)

Not especially - in that the original circuit design and protection is the most important bit which you are not changing.
The only thing in particular to watch with showers is maintain a good quality of workmanship on the connections - so the cable is stripped to the appropriate length without damaging the conductors, and the screws are done up tightly enough.
--
Cheers,

John.

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