When I see a BA/FA transformer it is either in a duplex receptacle that is over 6' or higher. (no GFI required).
Where is there a 6' exception to 210.8(5)?
I am not sure I would get too excited about a duplex, serving the transformer for a BA/FA. If NEMA would catch up with the code, the wall wart would have screw tabs spaced for the cover screws on a single receptacle.
