I need to purchase a new electric shower,
can I use one with a pump. The rating of the fuse is 30A

Thanks for the help

Mogman

you only have 7.2KW from a 30amp fuse so you will probably have to up the fuse. Also you can only use pumped showers on a tank fed system I beleive. If you want more flow might be worth trying a 10.5KW shower which you will need a 45amp fuse and appropriate rated cable.

Cliff

In my experience, electric showers are great in summer, but flow rate is reduced in winter as the feed is colder so they use more power heating the water and have less left to pump.

all depends on your cable.. anything above 7.2kw needs bigger cable than 6mm which is what is probably fitted...

Ive just fitted two mira sport 10.2kw (iirc) showers with steven (p20spd) and the 10mm cable is a nightmare to work with..

also its worth bearing in mind that your allowed +10% / -6% variance on supply voltage.. so if its a long run then you may need to go up in cable size occasionally.. (shouldnt be a problem)

see http://www.tlc-direct.co.uk/Book/4.3.11.htm

David

David

Does it make a noticable difference to the flow using the
more powerful shower.
If it does I will chnage the cabling.

thanks

its not my shower.. so dunno..

we just went for a big un.. <more power!> :D

David

For more flow, IF you have a cold water header tank, you want a thermostatic power shower rather than an electric chower IMHO. These mix your existing hot and cold water and pump it, rather than electric showers which just heat mains cold water up (never come across one with a pump installed too, though they probably exist). Therefore, electric showers will never give you more than mains pressure/flow, unless you fit a pump somewhere.

Pumping takes much less electricity - my power shower runs on a 3A fuse.

You cant boost the water suppy to an electric shower, it would not be able to heat the water quick enough. You can only boost the ones that come off you heating boiler or hot water tank.I'm sure you can go up to 9kw on a 6mm cable with a 40A mcb behind it, if its a fairly short cable run.