If I understand your situation correctly... Apparently the camera and the ethernet switch are in Class 1 Div 2 areas. My first question is why? The situation that you describe implies that it would be easy to place the switch outside a Div 2 boundary. So, that said, the purged cabinet would likely need seals to maintain the airtight integrity, not the same as needing a seal to contain explosize gasses and fire. These are two different things. The Camera only needs a seal if the interior components have the potential to ignite the gasses. It is at each Hozloc boundary that code will require seals. As long as the cable is continuous, it can be treated as any other low voltage wire or cable and I don't understand your terminology of "splitting" it out. It can't be in a conduit with class one or power wiring anyway, and you have to create space between each conductor or cable in a seal, otherwise what do you mean?
Originally Posted by Timlocke
I know what I don't know, and I know where to go to find it!