George, if the circuits are definitely Class 2 and/or 3 from listed supplies or equipment then the CODE rules for installation of the conductors or cables together fall squarely under Art 725 (see Section III). However, I have found in the past that the installation instructions or the wiring guidelines put out by the equipment manufacturers will likely be far more restrictive as they are concerned with performance issues of their systems. That part makes it tougher to enforce...
