I saw today above a drop ceiling, kcmil conductors tied up with rope, hung from bar joists. This is what was used instead of raceway. Through the ceiling down to the load centers, they used cable tray. I find all sorts of articles on raceway and support, but cannot seem to find where specifically this would be illegal. It has to be illegal.
It is thhn 350kcmil wires, run in 2 sets of 4 (parallel) Two conduits come out of a disconnect and end a foot above the drop ceiling. The wire than is elevated 2-4ft above the ceiling tiles, and supported by rope (tied to the bar joist a couple ft higher) for about a 20ft span where there is than a cabletray, which runs down to a control center.
I'm not sure of the Code side of an installation like this in US terms, but this has to be one of the roughest ideas I've heard of in a while. Some "electricians" seem to forget the basic principles of electricity. Now, what say that there is a decent fault on that circuit and the fault does not clear as it should?. Anyone ever seen what in-adequately supported wires do under the influence of fault currents?. I'd sure hate to be standing under that ceiling if a fault did occur, I'd imagine there would be a fair amount of wieght in a bundle like that.