wire size for high amp alternator

I run a 90amp alternator with 6gauge. I'd go 4gauge for about 120amp. And 2gauge for anything more. You can pickup a snazzy circuit breaker like i did, i think they make them that high but im not sure.

This is my 80amp breaker, nice, clean, safe install. Ran about $35. It's made by 'blue sea systems'...it's for marine use, so check like West Marine and such, or on-line

http://goodysgotacuda.com/GGACPics/100_0817.jpg