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.
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