Is this how we want to teach our apprentice electrician's? Ok it might work as good as another strapping method but the piece of romex is not a U.L. approved method for support, and not to mention the multiple cables in one romex clamp and the use of the ENT in the attic are surely violations. That being said look up article 110.12, from the 2005 handbook, Examples of installations that do not qualify as "neat and workmanlike" include exposed runs of cables or raceways that are improperly supported(e.g., sagging between supports or use of improper support methods) etc., and I know it says exposed but come on make it code compliant and nice looking even if it is going to be covered with sheetrock, that is why we use this thing called the NEC.
