i'm no sparky, but i would imagine if all of the runs out to the lights where terminated in a patch panel with IEC sockets, and possibly the input run to the conventional breaker for lockout, i cannot see why there may be much of an issue, as then it would only be a case of you swapping around IEC 0.5m extension leads, with no lethal voltages present on exposed connectors,
though i would also imagine the feed ins would need to be in metal conduit until they enter the wall (if along the floor, otherwise may only need pvc) and the cabinet / rack would need to be bolted in place to prevent easy access to the mains terminations,