Hi,
I have a 9.8kW shower which I wish to install. It already has 10mm cable. The manual is quoting 45A breaker (9.8kW @ 230v, 9.0kW @ 240v), will the shower be ok operating on a 50A breaker? What are the potential risks with going higher than 45A?
Many thanks
Dave
Those figures sound like they are back to front...
9.8kW at 240V indicates a heater resistance of some 5.8 ohms, which on 230V would yield a power output of just over 9kWIt takes longer to operate in response to some types of fault condition. Also in may not adequately protect the internal wiring of the shower.
John,
You are right. 9.8kW @ 240v, 9.0kW @ 230v. Doh!
45A type B star breakers seem to be hard to find. Crabtree don't seem to do one.Dave
A 40A one will be fine...
Whats the rating of the switch and cable to the shower from the consumer unit?
That is because they do not make them.
It will probably pack in after 20 years and need replacing, other than that it should be fine.
Adam
"They" being Crabtree I take it?
MK do them:
The switch is rated @ 50A the cable is 10mm.
John, thanks for the link. I was going to put an order in with TLC, so the timing couldn't have been better.
Cheers
Dave
Yes
Adam
On 8 Mar 2007 00:02:16 -0800, "Dave" mused:
So what's the rating of the cable then?
The best case is about 63A when clipped direct, with no other derrating factors to include.
On Thu, 08 Mar 2007 22:49:32 +0000, John Rumm mused:
I know that, but only the OP knows what the actual rating is.
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