8kw Shower....

[Welshsparky]

Got a customer that doesnt want a 6mm shower cable upgraded to 10mm but rather downgrade her shower to 8kw

Anybody know were to find a decent not to price 8kw shower?

 

[telectrix]

if insulation was done properly, there would be no need to derate cables whatever. insulation should be installed at the perimeters of the building, not internally. in other words, under the roof. not on the loft floor. we pay council rates on lofts, so why on earth make them unusable. will the council reduce the rates by 25% due to the loss of 25% of the home.? will they bugger.

 

[lofty84]

I wish this was enfored, if it was put under the roof instead of on the floor it would almost be a pleasure to work up there

 

[scotsparky]

As long as the OCPD is correctly rated for the cable, then I think you could get away with a 8.5kw as they are highly unlikely to use the higher temperature settings unless they like to scold themselves.

thats ok in general but the CCC of the cable drastically reduces if its in insulation so unless you do the maths first be carefull

 

[oldtimer]

I think we are missing a point here years ago it was 7kw and that was your lot since then its 8, 8.5, 9,9.5, 10, 10.5, 11kw and we are all trying to squeeze 10mm cables into a 45A pull cord
so what next 15kw and 16mm ? the thing is electric showers in my view are absolutly useless plus people are shocked because they go abroad or to a hotel in this country that has a pumped system then comes home and thinks if I upgrade my shower then I will get that , well no you aint and when I get asked what electric shower do you have in your house I reply I will never put one in my house I have an immersion tank with a shower pump.

 

[Guitarist]

I agree trev but with hind-sight now all buildings that dont have loft insulation are slowly been upgraded and all new have it, if you wire through the loft you should be designing with the propect of loft insulation been fitted at some future point, i just did one and kept the cable above and where it passes down i fixed a 2"/2" trunking so any depth insulation would be kept off it.

I always bring conduit 6" into a loft so that insulation is kept off the cable. So much safer and easier to work with.

 

[steveberry11]

Just suppose you did a rewire, you did all the calcs and derated the cable accordingly and have the paperwork to prove it.Everything is fine and tests out perfectly so you cert it, money changes hands and everyone is happy.
Then some muppet comes along and dumps 200 mm of tickly wool all over it which causes the cable to heat up and eventually starts a fire.
Who is going to be held responsible? Certainly not you imho, you have done your job correctly and can prove it. What I think the problem is is that companys have sprung up out of nowhere supplying insulation all paid for by the government. If they are not aware of the effect of their product or are unable/unwilling to train their monkeys oops sorry I meant installers then it's their look out not ours.

Quite right Trev we can only do our best on the day.
One thing more electricians should use is the digital camera. After every install take a few photographs. It's free and archive them just incase. This has helped me a few times with damaged sockets and paintwork.

 

[trev]

For the memory space it would use on a spare hard drive I think it's a bloody good idea mate

 

[thefish]

Toolstation or Screwfix do 8.5Kw