There is no debate and it's not up to the AHJ or an engineer. The code is quite clear.For NEC 2011.
I guess it depends on the AHJ and Engineer in charge... beyond the 725 and 800 debate...
I wonder if you are reading the same book as I am. Please quote that data.For NEC 2011.
From what I see the data in 800 refers to Shielded Twisted Pair for WAN and LAN Ethernet communication within a building.
For NEC 2011.
Under 800.2 a communications raceway is defined as nonmetallic, and a circular raceway is a conduit, so to me there is no confusion that this type of wiring method (sch 40 and 80 PVC) is approved if I choose to use it.
An enclosed channel of nonmetallic
materials designed for holding communications
wires and cables in plenum, riser, and general-purpose applications."
Sounds to me like they are describing a cable tray. I see nothing about circular, do you? At any rate you will not get away with installing PVC in a plenum or air handling space.
No, not here because that is a design issue, not an NEC issue.For NEC 2011.
It may be more productive to focus on addressing the routing of data (Cat5e) and signal (Class 2), in the same vicinity as AC power and electrical noise sources. Because once wiring method is selected we then have to decide how to route it.
I suggest that instead of being argumentative you make an effort to understand what we are trying to tell you.