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Thanks for the help.

Does anyone know what the present regs state should be the size of meter tails for a normal size home with a split load CU containing a 100A isolator and 63A RCD? Cheers.

Thanks again for the advice people, it is very much appreciated. If I decide to go along the route of fitting a separate shower CU will I need to uprate the meter tails as I will be feeding another load which is 2/3 the size again of the origional CU? I am not entirely sure of the size of the...

Thanks for the advice mate, much appreciated. The shower that is to be installed is 9.5KW which works out to be nearly 41.5A at full load. The resident has an old type fuse box with a 60A isolator. The electricity board fuse has displayed on it '60/80A'?? Other web sites say that a 9.5KW shower...

Thank you for the swift reply. As a plug in mcb I meant the type that plugs into a spare fuse way in the old type boxes. This obviously will not provide the same switch off time as an RCD should a fault develop and works on the principle of overcurrent rather than a earth fault current, so do...

Does anyone know if it is sufficient to install an electric shower in a property with an old fuse box consumer unit, and protect it with only a plug-in mcb, rather than employing the ideal solution of installing a separate shower consumer unit. I am pretty sure it is dependant on the fault...