NO BRANCH CIRCUIT CONDUCTORS SHALL NOT BE LAID ON THE FLOOR
Huh? What are you talking about?
NM cable cannot be run where subject to physical damage. Are you going to tell us that running romex on the floor is not subject to physical damage? Temporary or not, it is wrong.
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The only thing I see wrong is the cardboard on the switchgear.
So you don't consider a long bundle of cables to be a problem?