Can someone point me to a resource which gives typical maximum fault 
currents available from a domestic electrical supply in the UK?

BS 7671 discusses the issue and gives methods for calculation of 
temperature rise under fault conditions, as well as maximum fault 
clearing times, but it doesn't appear to give any numbers for the 
fault currents. I have no feel for what sort of numbers  are actually 
involved although I suspect that it will be in the kA range.

Rgds

Nick.

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