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On an electrical installation certificate it asks for the main switch type. What are the Bs numbers and what are the main types for domestic use? It also asks for the prospective fault current. What would this be in a domestic installation? I would be very grateful for any help. Thanks.

I know there are standard circuit arrangements for rings and radials, eg. rings use 2.5mm cable and are protected by 30A fuse or 32A mcb with max run of 100M squared etc. I wonder could anyone please let me know of any standard arrangements for cooker or shower circuits, if there are any. Thankyou.