I was working on a rooftop exhaust system that has a single motor with two speeds ( high and low ) To my surprise it also has two disconnects one for low and one for high. I would think that one disconnect would be the normal approach except the highlow speed switching control for this is inside on the floor below as is the source of power. The disconnects that are there I presume disconnect the high and low speed winding from their power source. Anybody ever see this before? I was just thinking of the safety concern, if one didn't know about the second disconnect anybody could be working on this motor thinking it is safe to do so but in reality.....gotta check the code book on this one.
