I accept NM cable in a raceway to a box especially for a surface mounted switch or receptacle in a basement.
However, AC or MC cable without a bushing or listed connector could create some problems with the jacket cutting the conductors, or extending into the box and contacting live parts.
I have seen Ac cable used with NM connectors and the metal jacket was hanging next to the bus bars in the panel. Not good.
Usually NM in a conduit run except as noted above indicates a non-electrician did the work.
Alan--
