bordew,
I'm not convinced that these units are made to be wired as such exclusively. The do come with separate sockets, each with their own set of tails (B & W), so there are no modifications being made inside. I don't recall how the instructions read, but the recomendations (single cable, raceway, etc.) made may be for the purpose of simplicity and a 'can't go wrong' solution. I don't believe that I've ever seen these installed with a single cable or raceway though.
Bill
