amp wired to fuse box


    BIG 3 Q. my power wire is hooked to fuse box., can i run bigger wire from alt to it?

    when i had amp installed maybe 12 yrs ago they ran power wire to nut on fuse box (under hood)not battery (04 grand prix).. i'm looking at it to see what all i need to do big 3 upgrade.. i noticed wire from alt goes to battery but has a "y" off to the fuse box so it's basicly just running...