Am I correct that pvc conduit is allowed for essentially all low-volt conductors in a theater (according to 520.5(A) exception and handbook commentary)? Also, would pvc be among the code-compliant wiring methods for circuit and feeder conductors below a wood floor of an old theater? A wood floor obviously is not "fire rated construction". Purhaps the existing wood floor would not meet current building code?
In my personal opinion, pvc should not be allowed no matter what. However, the NEC , the NEC handbook, and a third-party handbook I have, all state that the rule does not directly apply to the communication, A/V, and fire alarm wiring. For these systems we are instructed to use their respected code articles. Those individual code articles simply say to use chapters 1-4 (specifically 3 of course). Obviously, different cities/municipalities can make up whatever rules they see fit. At present, I am only interested in national code. Thank you for your response Tesla.