I saw a job in a Switchgear room for a new data center in Chicago. The ceiling was about 80% covered...but with the neatest GRC bends and conduit layouts I've ever seen.
It was for a bank so I ran into the same picture prohibitions that Greg did.
I wish I had those pictures somewhere other than just inside my head.

BTW - They had the best method I've ever seen to check the ceiling penetrations (the mechanical room was directly above it).
They make sure that all of the conduit and pipe penetrations were sealed by building a temporary wood sill at all the doorways into the mechanical room and flooding the entire room with 3" of water. They left it for 24 hours before draining it. There's absolutely no way that there was an unsatisfactory seal anywhere that didn't get noticed, written up and fixed..


Ghost307