In car world, the design of some electrical wires utilize a FUSIBLE Link of wire that is designed to conduct a great deal of electrical current up to a certain point and then after a certain threshold this short piece of link will burn through and protect the rest of the electrical system should there be a direct short. It works kind of like a fuse however instead of a removable fuse that can cause connection problems, this link is grafted into the wire and is less prone to corrosion and the associated connectivity issues. I ask because I am buying a pusher airplane where the battery is in the nose and the alternator and engine are in the tail and heavy gauge wire connects the two units and there is no protection should there be a direct short in between. If airplanes do not have fusible links then what kind of protection is available for these large current providing items? THANKS IN ADVANCE!!!