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Thanks very much for all your good advice. I will look into to rules about notifying. If I were to have cicuits tested and obtain a certificate what would be the best way to go about this?

thats going to be fine if the only load on the rcd side is the shower, and the shower is less than 40A, Yes it is 40 Amps Yes, you will need an MCB for the shower circuit Thank you Adam that is what I needed to know. Will go today and install a 40Amps MCB on the RCD protected supply to...

Reply Thank you securespark, it is split load with one RCD 40A 30mA it was intended that this would supply the shower only. I understand that the RCD will trip in a fault condition if current ( 30mA) is detected on the neutral. As the RCD is rated at 40 Amps do I need to add a 40 Amp MCB? Ok...

I have replaced an old fuse style consumer unit with a MCB type. Lights and Fridge/freezer MCBs have been fitted. I need to connect RCD and MCB for shower and ring main. Shower is rated to be at 40 Amps with 40 Amps MCB and the ring main 32 Amps. What rating RCD should I be using? The ring...