We are currently working on a building with exterior walls constructed of prefabricated SIPs. Any nessecary wiring is run in a chase cut out with a hot knife and MC cable laid in the cutout, after the cable is installed the insulation is trimmed and reinstalled with metallic tape used to seal the over it. We were instructed by the manufacturers rep. on-site that this was acceptable. Our local AHJ has asked raised a concern about heat buildup in the cable as installed and wants documentation that this installation is acceptable. The only response I can get fron the manufacturer is " that is how we always do it". Has anyone else run into this? If so, how was it finally resolved?
KB
