All fuses have a voltage rating, which is independent of its current rating.
The current rating is the maximum current the fuse will pass; any higher, and it will blow.
The voltage rating is the maximum voltage that is allowed to appear across the fuse should it blow.
If the voltage is any higher than the fuse manufacturer's rating, it may arc across inside the fuse, causing power to continue to be supplied to the faulty item that caused the fuse to blow in the first place. This is obviously very dangerous, and could result in severe electric shock, or fires. The voltage rating is usually stamped on one end of the fuse.
A #10 copper conductor with an insulation factor of 90 degrees C with a 3% voltage drop is rated at 30 amps
30amps
45 volts
1000
230 Volts
1.55 volts
0.016 volt
Zero volts.
4160 volts
230 volts
neither...it should have 14.63 volts
3 Kv = 3,000 volts.