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Hi John, thanks for your comments. I'm not a practising electrician at the moment. I'm just interested in possibly taking this career path in the future and because of that done a few courses etc to improve my knowledge that's all. Thanks for your understanding and help :-)

I don't really need to know, however I recognise small gaps in my understanding which are usually very simple and small but annoy me !! That's all. Thanks for all your help.

Thanks for your replies to this. I now understand that a basic mains switch offers no protection it's simply the rating of the contacts of the switch. Could you answer what would happen if the installation was overloaded? Would it blow the suppliers fuse ? Thanks for all your help.

Hi everyone. Im having a bit of a problem understanding the function of the main switch in a consumer unit and would like a detailed explanation of why its there. I understand that they can incorporate RCD protection, however does a standard main switch offer any protection at all (overload...