Okay, now that the OP's question is thoroughly answered, I have a related question.
The grizzly 3hp cyclone and the 5hp cyclone both draw 22a! The 5hp is 16" versus 15.5", and double the filter area, so shouldn't it draw more current?
I have measured the 3hp at 22a, so that is accurate; I can only presume the 22a is accurate for the 5hp as well.
My only guess is that the 3hp motor is just horribly inefficient; but why would they do that?