I am working as a project inspector for a large project in the San Francisco Bay Area of Califonia. The electrical contractor has supported the EMT conduit and boxes utilizing screws with plastic inserts into the drywall. In my 20+ years as an inspector, I have always required that these supports be into a framing member rather than the drywall. When asked to correct the problem, the contractor indicated that NEC Article 348-12 only requires that the EMT be "securely fastened into place", and that per NEC Article 370-23 the boxes may be "fastened to the surface upon which they are mounted unless the surface does not provide "adequate support". He feels that the drywall with plastic inserts meet these criteria. I disagree. Does anyone have an opinion on this subject, or advice on how to get the contractor to support these items from the framing members.
