i stumbled across this site and have really enjoyed reading the posts and learning. i have a home owners permit to do my own wiring on my residence that i just purchased. the detatched garage had an old screw in fuse type panel that i wanted to update with a breaker style. the garage is fed through a breaker in the house's main panel with 4 ga aluminum. i have learned that the size of the wire is not sufficient for 100 amp service but have already purchased a 100 amp panel. the sizing of wire should allow for me to put a 60amp breaker in the house main and feed the garage from there. my question is this, do i have to change the main breaker on the garage panel to the same size as the house one feeding it or can i leave the 100 amp in place? it is the convertable type homeline style and they do make one to replace the 100 but is it really necessary? thanks in advance
