Good call, I've got plenum areas in the above job -- confirmed during my conversation with the engineer. This is one reason why we got along -- I asked all of the right questions up front.

Some GC's can be absolute jerks. On one job, as we were packing up after finishing the pre-wire, the GC suddenly brought up wire type codes, hinting that we would need to re-do everything with code compliant wire. I don't know how many other A/V guys he pulled this stunt on, but we directed him to the compliance markings printed on the wire and left.

In the job I mentioned earlier, it's an almost 100 year old building and I found zipcord in risers.