I am working on the site of a new sewage plant. There are several man holes, hand holes and pull boxes where security, phone, PA system, 480V feeders, 120V control wiring and other 480V circuits share the same enclosure with no divider. The runs were designed this way by the electrical engineer. When we questioned the engineer on the issue of code compliance he said that because it was an industrial installation that it was OK. What do you think?