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Boulevardier · 3rd Aug 2019, 5:14 am

I don't trust fuses generally. In the IEE's "A Practical Guide to the Wiring Regulations" it says somewhere -

"..for example, for a 30A circuit protected by a 30A rewirable fuse and drawing an overload current of 60A, disconnection on overload may take up to 4 h. ."

I'm not sure what they mean by "rewirable fuse", but I suspect it includes both the old fusewire and cartridge fuses, as opposed to modern circuit breakers. If a 30A fuse can survive 60A for 4 hours before rupturing, then presumably a 13A fuse in a plug isn't going to disconnect instantly – or even quickly – even with a significant overload.

Mike

3rd Aug 2019, 5:14 am	#112
Boulevardier Octode Join Date: Sep 2017 Location: Bristol, UK. Posts: 1,657	Re: 13 amp fuse for 1.5mm mains flex? I don't trust fuses generally. In the IEE's "A Practical Guide to the Wiring Regulations" it says somewhere - "..for example, for a 30A circuit protected by a 30A rewirable fuse and drawing an overload current of 60A, disconnection on overload may take up to 4 h. ." I'm not sure what they mean by "rewirable fuse", but I suspect it includes both the old fusewire and cartridge fuses, as opposed to modern circuit breakers. If a 30A fuse can survive 60A for 4 hours before rupturing, then presumably a 13A fuse in a plug isn't going to disconnect instantly – or even quickly – even with a significant overload. Mike Last edited by Boulevardier; 3rd Aug 2019 at 5:21 am.