It was mentioned to run a smaller ground wire as a "fuse". Why not just go to NAPA and buy a 100 amp ( I think that is what I have in, but not sure.) fuse and put that in the positive cable right at the battery. Much safer than relying on a homemade "fusible link". NAPA has different amp fuses for them. Very nice item. Not real expensive either. Remember even though your ground wire burns off, your positive wire still has power in it, making it a possible arc point. Fusing it right at the battery limits the amount of powered cable to a few inches. I tried to attach a photo of the fuse I used. Don't know if it worked or not.

NAPA part #


BK 7821143

Lists for less than $12.