Bill Addiss We've got somewhat of an answer in fact it's already been partially answered. These sunroom/porch assemblys are indeed approved as raceways in most cases (be sure of the NEC code stamping or etching of the glass panels) sometimes the glass panels were marked because they were perminantly afixed to the adjacent channel and less obtrusive to see. At any rate I have seen some horrible miss use of this raceway for recepticle and switch placement. First of all it is indeed a nice way to be able to route wiring around the windows and door openings when no basement is present. the manufacturers of these components do have the appropriate boxes to cut into these raceways, but most companys installing these systems seem to have thrown away those pages when ordering a room for there customers. This results in some people with no outlets or lighting options (enclosed and accessable from the dwelling considered by our local authority as a habitable room...yah even in -40 degree weather), recepticles cut into the raceway without a box (nice), and my favorite the finished sunroom with handy boxes and emt painted to match the decor.
