Harold:
Sounds like you're going to have to make a call on that. IF the cb gets LOTO, the attic light & whatever else may be on that circuit is DOA.
A snap switch; cord & plug, or a real disco within sight? As it cannot be locked 'off' without creating a possible life safety issue due to no light in the area of the motor, and (I'll stretch here) there are 'multiple switches' that may energize the circuit, then it needs a means of disconnect within site.
Although the letter of the Code allows a CB lockout, doing that in your case creates a life safety issue. One question please, is there a receptacle in the attic?? Is it on the same circuit??
