Hi Jake
Any light on the subject would be appreciated. I presently installing an environmental test chamber in Dublin Ohio. the chamber is ten foot high and a drop ceiling will be installed around the chamber at the eight foot level with an additional three foot above the chamber it self. The space above the drop ceiling is used as a plenum for the AC system. The local city inspector is busting our chops because we are using polypropylene conduit for some lighting and control circuitsabove the chamber. He says this product can not be used.
Thanks
Barry
Thermal Product Solutions
PS The inspector could not tell the exact code he was enforcing.