Thanks again for all the advice, I'll be looking to swap the mcb if at all possible then, but I just want to be clear about the implications of doing so.
Sorry I'm a bit of a dumbass, but could I get a bit more advice on this?
So it's looking like I should replace the mcb with a type C, but what calculations should I do first if any and what are the implications? Would the type C not trip as fast if there was a problem, would it therefore not be as safe a setup?
Perhaps someone knows a link where I could read up on this?
Maybe I got this round my neck, but I thought that in a TN system, the main protection against indirect contact should be provided by the overcurrent device, not an rcd, thus contray to what has been said, you still need to meet the Zs for 0.4 sec disconnect on a type C to be able to use a type C
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