Hello,
I am thinking of installing an electric shower as back-up to the combi boiler.
I was expecting to use 10mm^2 cable but when I put some hypothetical figures into the TLC calculator it said I could use 6mm^2 clipped direct.
I think the highest powered shower is 10.5k, so I put 11kW into the calculator and a run of 12m.
What size would you use?
Thanks, Stephen.
The 10 mm^2, you what to fit the high power shower. The low power ones are hopeless. Also, go for a quality shower. I like Mira but there are others.
Don't forget it needs and RCB, Isolation switch, bonding, and is subject to type P inspection etc.
bell wire, with 3 heat exchangers, aeration, pulsing shower head and water recirculation :)
NT
or just run the bell wire inside the water pipe.
If no insulation, and it is being clipped direct/plastered in (not just lain on the plasterboard/joist) then 6mm would cover it with a bit spare. If it goes through/sits on/underneath any insulation, then put
10mm in.I'd tend to put 10mm in as it will cover virtually all eventualities.
As this is a new installation then it would be 10mm.
If you use 250V in the calculation yes, not if you use 230V - which is the nominal UK voltage nowadays
250V in what calculation?
presumably getting current out of kW
For a 240V 10.5kW shower?
What's the significance of it being clipped to the joist rather than lying on it?
[snip]I'm thinking that too.
Thanks, Stephen.
With that Adam could have a 24kW shower on 3 phase, using the copper pipe as earth. Should make him happy.
Tried 1.8lpm today, don't like it. Back to 2.25.
NT
Why not try it without the earth?.
That would make me happy
Film it for us. Arrange for someone else to upload it.
NT
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