Vin:
Yes, by the chart, but it is max 20 amp OCP! Now, this being a continuous load, comm lighting; that's down to 16 amps max load.

As mentioned within this thread by others; the design intent may have been 277 volt, and there was oversight by the installer & others it seems.

Yes, as I implied #12 will survive, perhaps for a long time, but...it is not compliant.


John