Ok , I am wondering about the voltage rating on a fuse. What I looked up is this rating is the rating if exceeded can cause the air/gas to ion's and for the electrons to arc over the broken fuse. So this would imply it would still be conducting and the circuit would never be broken even when the fuse has blown. ( this is all provided we exceed the voltage rating) If this is true can this arcing occur indefinitly or just for a split second like lighting does? If it can occur indefinitely then really no fuse can be 100% safe to break a circuit? Same question but with circuit breakers can they be prone to arcing? When buying a fuse I always ever was worried about amperage but now I am looking for voltage ratings as well. When I install house fuses and breakers I don't have any clue on the voltage ratings they just tell you the amperage 15 , 20 ,25 ,30 ,40 ,...etc . Curious to know the voltage rating of these house fuses? Probably in the 1000 volt range though just to be safe. I see in stores they sell fuses that are 5 amps 32 volt and 5 amps 240 volt. Why would anybody ever want the 32 volt one over the 240 volt one? Won't the high the voltage rating the better for the same amp fuse? Also once arcing occurs in a fuse if it stops arcing can it start arcing again or does once the air turn into a plasma state it cann't have no clue here? Thanks for any help in clearing these questions up.