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Hi The current installation I have is based on a 16A RCB with an RCD rated at 30mA from the CU in the house to the garage. The SWA cable used for this 10m run underground (tarmac) is 1.5mm CSA and it terminates in another non RCD CU which has three wire fuses one for lighting rated at 5A, a...

I have a problem which has shown up recently with the water heating or lack of it. The system I have is a pressurised combined water and central heating system. It comprises a standard ch pump which feeds 11 radiators, a second pump and controller which feeds an underfloor room heater and a...