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GMB · 14th Jan 2008, 11:56 pm

I believe that the standard mains fuse values were carefully chosen so that the smallest one in a chain usually blows first.

It's about a factor of 3 to get this effect, hence 100A master with 30A ring and 13A on the plug and even 3A or 5A plugged into an extension.

14th Jan 2008, 11:56 pm	#18
GMB Dekatron Join Date: Aug 2003 Location: near Reading (and sometimes Torquay) Posts: 3,095	Re: Fuses I believe that the standard mains fuse values were carefully chosen so that the smallest one in a chain usually blows first. It's about a factor of 3 to get this effect, hence 100A master with 30A ring and 13A on the plug and even 3A or 5A plugged into an extension.