At one time about 20 years ago, I too discussed this with the Former Chairman of the NEC Committee Richard Lloyd, and he said that this was acceptable if the installer wanted to accomplish the separation between certain types of conductors.
It does look funny, but what are the hazards and is it on a government site where electrical inspections may not be considered?
Right or wrong I've done that several times when upon doing service to a piece of Tank Monitering equipment I've found allegedly intrinsically safe wiring mixed in with 120 and 240 volt controls. Its been done outside in a trough that been installed to accept many 3/4 pipes from a gasoline install. I generally shake my head in disbelief that anyone would mix the wires in with controls but.....
Joe, I consider it a violation of several articles, not the least of which is 110-3 which is how materials are to be utlilized. The conductors are fire alarm conductors, and fire and security conductors are included in the box.
The disparate bonds are what concerns me the most. Should a fault occur on either the pipe, or the box, there would quite likely be a sizable arc to the item not securely fastened.
Walrus, did you forget to bring your bender with you to go around the box instead of through it? I don't understand. I have also shielded intrinsically safe conductors, but also managed to use connectors for a solid grounding connection or went around the offending item in the way.
Accessibility is one of the issues brought to the contractors attention.
Re: Pipe running thru J Box#114642 05/24/0305:55 AM05/24/0305:55 AM
Didn't forget anything but when its installed wrong and I'm sent in to repair another problem I try to fix it the best I can. The conduit in question mught be in the middle of 15 or 20 parellel pipes with only 2 feet exposed above ground with a vertical seal off. I realize some customer might pay to fix it right but in Maine where money is tight that isn't common. I see no problem putting a 4.5" nipple straight up thru a 4" raintight trough, putting a 3/4 myers hub on top and then continuing into the building. It may violate a code but its certainly better than having conductors that are supposed to be safe mixed in with AC controls. The conduit going thru is bonded by lock nuts just like the rest of the pipes.
[This message has been edited by walrus (edited 05-24-2003).]
Re: Pipe running thru J Box#114643 05/24/0306:25 AM05/24/0306:25 AM