This Q has been run in both this BB and the MHE forum in the past.
The way it was originally asked by jdevlin,
it's perfectly legal. (without handle ties).
If it were in fact a multiwire circuit, with say 4 #14 hots (2 per Ø), and a #10 grounded conductor, it's perfectly legal. (the handle ties would only be required in a dwelling where the multiwire circuit supplies devices on one yoke, or one piece of equipment. Commercial, no handle ties if the loads are all line to grounded conductor.
The loss of the grounded conductor on a multiwire circuit, although it can lead to elevated voltages, will not put 240 volts to any single device unless the impedance on the opposing leg is 0 ohms.(dead line-noodle short). It is a series circuit once the grounded conductor connection is removed, with the loads on both legs in series.
