Doesn't this limit you to 55 amps?


Quote
334.80 Ampacity. The ampacity of Types NM, NMC, and
NMS cable shall be determined in accordance with 310.15.
The allowable ampacity shall not exceed that of a 60°C
2014 Edition NATIONAL ELECTRICAL CODE
(140°F) rated conductor. The 90°C (194 OF) rating shall be
permitted to be used for ampacity adjustment and correction
calculations, provided the final derated ampacity does not exceed
that of a 60°C (140°F) rated conductor.

Greg Fretwell