I am installing equipment in a hazardous (C1, D2) location. All the instrumentation is XP rated for this area. The enclosure is also located in this classified area. The enclosure is a NEMA 12 type with an argon purge. As I interpret my NEC manual, that should be suitable. I have used seals and meyers hubs to enter this enclosure. I have two "junction boxes" (NEMA 12, no purge)mounted closer to the action that are used simply as a manifold for routing cables to the individual instruments from a couple of conduits. Keep in mind that no terminations are made in these "junction boxes". If the terminal chambers on the instruments are XP rated (I believe that means they are rated to contain an explosion), do I need to use seals at the entrance to these terminal chambers? If so, then I have an alternate question. I have read a reply to someone's question concerning seal-tite and EMT conduit stating that EMT could not be used, and that seal-tite was limited to 6 feet for grounding purposes. If I use seals and supply a sufficient ground wire, then what is in between shouldn't matter, except for physical protection. Sorry I'm so long, but I do appreciate any advice.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, weâ€™ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now
Aberdeenâ€™s survey of 100 top executives reveals how discrete manufacturers can ensure quality in complex, innovative engineering environments. Download this report for an exploration of how to best implement quality control in manufacturing. Download Now
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now
In this engineering.com research report, we discuss the rising role of simulation and the paradigm shift commonly called the democratization of simulation. In particular, we focus on how SOLIDWORKS users can take advantage of simulation-driven design through two analysis tools: SOLIDWORKS Simulation and 3DEXPERIENCE WORKS. Download Now