Looking at installing a 600 amp, 480v, 3 phase panel that will be fed from an 800 amp breaker from the switchgear room. What size wire can I use to run from the 800 amp breaker to the 600 amp breaker. I was assuming to parallel feed 600mcm because of the 800 amp breaker, but now I'm wondering if I can go with 350mcm because the 600 amp breaker will trip, hopefully. I know I have to use the 75 degree table. Maybe I'm overthinking this to try to save some money. Cheapskate here.
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