I'm looking to wire a 120V dust collector to a 220V table saw using a relay so that when I turn the saw on the dust collector starts up. Some time ago a friend of mine who was an electrical engineer did that for me on another saw that was 220V. I just don't remember the way to get it done. If there is anyone that knows how to wire the 120V dust collector in to the 220V saw I would appreciate it.