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Since it does have a 3 pin plug-and if the ground pin is connected to the metal body-it would be legal under OSHA rules to use the machine commercially.The one I used to have said Royal "Commerical" on it.Since I have lots of other Royal tanks-don't really miss the machine.The grey one I had didn't come with a powernozzle or powernozzle compatable hose.It was a suction only vacuum.
