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Old 1st Jul 2019, 3:49 pm   #35
TonyDuell
Dekatron
 
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,190
Default Re: 13 amp fuse for 1.5mm mains flex?

I can't be the only person here to have a large jar of (in many cases new) 13A fuses that I have taken out of mains plugs to replace with 3A (or 5A or...) ones. The new ones, of course, came from new plugs which almost always come with a 13A fuse.

As for things that need 13A fuses, my Philips P850 minicomputer has a pair of linear PSUs. The normal running current is quite low, but the switch-on surge (which causes the transformes/chassis to give a very loud clonk as things move under the magnetic field) will blow a 3A plug fuse. As there are internal anti-surge fuses in the PSUs, I have no worries about puting a 13A fuse in the plug.

I doubt the different impedance of a 3A and 13A fuse makes any difference to the sound (at least to non-audiophools). I can't see it making much difference to the total impedance of distribution cable from the substation, electricity meter, ring main cable, power cable, etc.
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