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  1. G

    Will a MCB protect my additional circuit.

    Moved into an old terraced property recently and want to add an additional 9.5 KW Instant water heater for remote en-suite. I've chosen an instant heater as it will supply both shower and hand basin with hot water. The existing supply is through a 60 Amp fuse and the meter tails feed 2 fuse...
  2. G

    Instant water heater

    Want to fit a 12KW instant water heater to service 2 en-suites. Is 10mm cable sufficient? , the length is about 10m. What size MCB should I fit, the house master fuse is a 60 AMP, and I do not want to overload it if the cooker (electric is on) when this 12KW heater is switched on.
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