There are usually other considerations with Listed equipment other than just the terminal capacity...but related to it. Bending radius is evaluated on the basis of the largest size conductors the terminals are expected to accept. The withstand testing of the equipment is usually performed with the largest conductors. Etc.
Evaluation of the terminal performance under load does not presuppose incorrect size conductors nor does the torque spec and the engineering of the lug strength. So, NO!
