Re: distribution block
Bob (petersonra), you are correct NFPA 12.2.1.5 requires a subplate but it does not preclude that subplate from being mounted to an enclosure side wall or door. NFPA 79 is not a required standard although the NEC does reference it for industrial machinery.
Bob (bthielen), all field cut/drilled holes including conduit entries destroy the integrity of an enclosure. It is up to the AHJ to decide if the materials/methods used to "seal" the hole are acceptable for the environment. I just saw a Hoffmann hinge kit mounted through a NEMA 12 enclosure wall where the factory supplied sealing was simply nylon/plastic washers.
[ February 01, 2005, 06:50 PM: Message edited by: jim dungar ]