I guess you cant match up with your starter then. sorry, laughing. You will want to find out the total amp draw from all appliances, as if they were to be running at the same time.A general rule of thumb, is 10 ga. = 30 amps,8 ga. = 40 amps. I'd find that out, then go the next size bigger, to ensure equal discharge.

Give a man a fish, and he will eat for a day. Teach a man to fish and he will sit in a boat and drink beer.