missing my point folks. the NEC defines ampacity table the way it does for many reasons. then comes along some exceptions that seem to shift it from the realm of very cautious (using strict verbiage, like 15A(max) ocpd for #14) to a realm of "hmmm, that could be dangerous". under expected use with proper install, a non-continuous load single motor bc that needs 13A while running and starts with 28A inrush where the bc is 30A (yes, the ocpd defines the bc, thus has a 30A ocpd), has potential to be more hazardous than most other situations, one of which i noted by example.
given that NEC says the ocpd defines the bc, then the bc (whatever it needs to be) should be using a wire sized appropriately from the ampacity table regardless of the load type. a 30A ocpd should have wire size chosen from ampacity table, perhaps the exception (for motor) is that you can choose it using the 90C column.