As allowed in 225.30, I am supplying Building B using a feeder on the load side of the service disconnect located in Building A. The buildings are under common ownership. Is there a code article which prevents me from routing this feeder through a panelboard (i.e. not in it's own conduit). 230.7 prevents service conductors being installed in the same raceway as other conductors, but this is not a service. Anyway, I have hunted through the code book and cannot find something that disallows this.