I finally made the plunge and purchased an Oneida 2 HP cyclone system for my shop including the Smart Switch remote control switch. As I was checking out the remote control switch on the outlet prior to connecting the dust collector, I could not get the switch to shut off both legs of the 220V power as indicated by an inductive voltage tester. I called the manufacturer and was told that there is voltage on one leg as part of the switch, but that the amperage was too low to present a problem. It is still a little bit of a concern that you test and find 110V indication on the leg and you think the outlet should be disconnected.
Has anyone had a similar exerience? I know there are other manufacturers of remote switches out there, and may want to check out another. I have not had a response from Oneida yet on this but am interested in their position also. I am getting close to the point of being able to connect the ducts to equipment and put the system to use.