Junkie,
I'm under the impression that you have 7 two wire circuits which means they are all current carrying conductors. Looking at 310.15(B)(2)(a) you find that you must derate to 50% of the thhn value of 30A and the ocpd would be 15A.
Why aren't you installing 3 wire circuits which would reqire you to derate to 70% and your ocpd would be 20A?
Ron
