Jeff,
You are not starting trouble, you are sharing very good information.
I think the point I was trying to convey is that there will always be TWO wire attached to the motor. One might be hooked to the frame to locate on a grounded body component, but there will always be TWO. You will never have an instance where the motor frame must be in intimate contact with a grounded source for the motor to function. A wire will always be supplied that must be attached to a grounded point and another wire that is connected to a power source.
Wow, what a novel. So, in conclusion Jeff, I hope I haven't come across as argumentative as I truly value all input and try to respect every ones opinion.
Stuart