DIY Doctor

Which cable to shower?

Postby Peter Do It All » Tue Feb 23, 2010 7:27 pm

I'm installing a steam shower that requires a dedicated cable to the consumer unit. It has to be able to take a full 16amp load when in full flow. What thickness of twin and earth wire is best?
Thanks to anyone who can help.
Peter Do It All
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Simply Build It

Postby ericmark » Wed Feb 24, 2010 6:10 am

The route and length will change what is required likely to be 2.5mm for 16A but it's not quite that easy.

It will also need Part P and to be candid it costs that much to DIY in council charges not really worth it.
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Postby collectors » Wed Feb 24, 2010 6:41 am

16 amps is just over 3.5kw. Now i might be wrong? But steam rooms are quite often have heavier loads than this & i have usually had to run 6mm TWE cable to them. See if there is a KW rating label on the unit & post it back here. This also wants to be an individual run from the consumer unit on its own fuse with a fitted RCD that will be part of this circuit.
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Postby Peter Do It All » Wed Feb 24, 2010 7:00 pm

Thank you for the replies to this.
I realise about the individual run and RCB, so that's sorted. The unit seems to have a max. output of 3.1Kw and the run is in the region of 40 feet.
I'm guessing the 6mm suggestion might be best?
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