Can pneumatic tubing be installed with low voltage wiring in the same raceway as it is an intergral part of a temperature control system. I am being told this violates 300.8 but I disagree on three points: 1. I believe this is referencing 600v cable, 2. this pneumatic tubing in the application above is not an "other" system its the same system and often times goes to the same device and a shared control panel 3. Panels are constructed and shipped all of the world that have DDC signal and pneumatic connections in the same enclosure which is also a raceway. I believe that 800.52 should apply to this type installation and I see the pneumatic tubing (which has very small pressured air) as no different than fiber optic or other nonconductive tubing. Please let me know your thoughts on this. Thank you,