I'm running a 120A 17si alternator with my electrical system laid out like the MADD new system: http://www.madelectrical.com/newstuff/ The junction block on the firewall is the alternator sense point. However, I need to upgrade the alternator charge wire from 8ga to 4 ga in order to handle the additional amperage. I also run a winch off of a single battery installation for now so I'm considering upgrading the battery charge wire from 10ga to 4ga in order for the alternator to provide some meaningful amperage during winching. Else, the 10ga will have too much voltage drop and potentially blow the fusible link. Q: anyone out there running 8 ga fusible links on an otherwise 4ga wire line or is this a waste? It seems to me like the fusible link would introduce voltage drop which is the whole point of upgrading the line to begin with.