Selecting a fuse has absolutely nothing to do with what equipment you're running. The purpose of the fuse on the power wire is to protect the wire not the equipment hooked up to it. Most decent amps have their own fuses. When selecting a fuse you should look at the specs of the wire. For example most 8 AWG needs about a 60 amp fuse, most 4 AWG needs about an 80 amp fuse, etc.