Most common way of "reparing" a diazed fuse is just to wrap a strand taken from an old cord around the outside of the fuse. Have seen my uncle do that. The more professional way is to open the fuse and run the strand inside. Still this turns a 10A fuse into a 20 or maybe 30A one. Worst idiots are the guys who stick a solid nail inside the fuse. That's really no blow! My dad tells the story how he sometimes fixed Diazed fuses by buying the appropriate size of fuse wire and opening the fuse. That's really a safe but pretty laborous repair! Wrapping kitchen foil around the entire fuse is another trick.
