Old electrical fusebox

Rewirable fuses have their own tables in the IEE regs. They basically read that you are limited to 50cm of cable for every circuit and you're going to die.

Christian.

The mains voltage in a domestic installation is nominal 240 volts Alternating Current. I personally think you need a electrician, but if you mean the Amperage ratings, then you would have to tell us what the load requirement is and what type of cable the fuse is going to be protecting.

Please don't mess around with fuses if you don't know what you're doing. Fuses are safety devices which if wrongly set up can and will cause dangerous situations to occur.