What fuse to put between alternator and batt.???

[hachiboy]

Sup everybuddy, Well like the title says, I just wanted to know how many amps the fuse i am going to put between the battery and alternator.

I have an Sr20 redtop with a quest 125 amp alternator. I am using 4 gauge wire. i mite be getting a Braille battery later so i dont know if that makes a difference.

Thanks in advance. . . Peace!