I have two wings of a building separated by 14' of outdoor area. I have been looking for any requirements as to these feeders going underground (other than the standard underground requirements.) It is the same building - just a shorter route - much shorter. The facility is industrial and there will be a number of conduits going to different 400A panels in various locations. The routing for all but one of them is 40 or more feet shorter using this pathing. Is there any problem with this? If it was a different building there would have to be a main. But it is the same building. Thank you for your help.