Quote:
Originally Posted by crofty83 Recently my father fitted a new shower but after about 3 minutes of use the trip switch on the MCB trips (which is rather anoying). The only rating I can find on the MCB for the shower is B32, this could be wrong though.
Any ides on why this is happening would be greatfully appreciated. Thanks
The shower is rated to 8.5kw and a link to it is below Buy Caselona II 8.5kW Electric Shower. at Argos.co.uk - Your Online Shop for . |
your shower pulls just on 37A
A type B MCB trips off instantaneously at 3 to 5 times its rating (90-150 amps approx)
it is designed to carry 32A indefintely, and above that its a matter of time against current
ie, the more current you overload it with the quicket it will blow
You will need a B40 in there and should be looking at at least 6mm cable, but maybe even 10mm even if there is thermal insulation etc
My advice? Get a sparks in, you have already overloaded the circuit
