ObTechAudio
Senior VIP Member
So I'm doing a big 3 upgrade and I have a simple question, does the positive connection from the alternator to (+) of battery need a fuse? If so how big? ANL 250 amp?
As long as you have easy access to the fuse and carry spares or still the same outcome that you're going to be stuck wherever you are because of a $10 or less fuse couldn't be replaced. I suggest a 300A for a 0ga right next to the battery from your alt.I've always known to fuse it, but as of late, people have been saying not to fuse it, because if it blows, your alt won't be charging.
So for the sake of it, I'd fuse it. Rather be safe than sorry
and the fuse solely depends on the wire gauge you use. I presume that you're using 0 gauge, so yes 250a would be fine