Mains fuse size

[BigRedX]

To the OP who appears to be in the UK. Just go and buy a standard mains lead with an IEC C13 connector at one end and a normal 3-prong UK mains plug at the other, from a reputable source. Then it will have the correct fuse for the lead which is all the fuse in the lead is there to protect. Job done.

[Rich]

I tend to put 13A fuses in things with heating elements -- kettle, toaster, etc -- and in the plugs for extension cables, 4-ways etc. Everything else gets 3A or 5A.

My Shuttle amp has a 5A I think, the wireless PSU a 3A. I recall that my old Carlsbro Delta bass amp came with a 7A slo-blo. Must have been a big ol' inrush.