Originally Posted by porcupine73
...If you get the cable at Home Depot or similar they usually list the amperes its good for, because if for some silly reason it has only 60C insulation it might not actually be good for 60A by code. ...
To expound further, the whole circuit and all connections must be considered in the OCP/ampacity. Ampacity is limited to the weakest link.
IOW, doesn't matter if the wire is rated 75A @ 90C if the weakest link is a termination rated at 60C. Then only the 60C ampacity rating would apply to the entire circuit.