Conduits

Most data cables here are not run in conduit. So can't give you a recommendation. Will say that to pull data cables though a conduit can cause stresses on the fine wires that could cause problems in their use. That is why most are laid in and bunched and tied up. The only place they maybe run in conduit is the straight down a wall to their outlet box.

Will say there have been a lot of question about the use of PVC conduit over the use of EMT. Warning in a fire situation the PVC off gases harmful fumes at very low temperatures. This may be a problem for the occupants evacuating the building. Though there is a similar problem with EMT and it's galvanized coating. The temperature need are much higher, high enough that there won't be much life left in the room to evacuate anyway. So the increased use of PVC as a building material may cause problems in fire situation not only to the occupants but to the firefighters putting it out.

Also PVC may not sustain a fire but it will burn. Most structure fires do not reach a temperature to burn metal conduit. Nor do most shorts in wiring reach temperatures that can cause problems in metal conduit. In PVC a fried wire may reach temperature that it damages the conduit. It maybe just enough to tack it to the wall so pulling a replacement is impossible. So your left tearing it out to replace the conduit.

Not saying that PVC does not have uses in the electrical trades. Just that the amount we place in our building structures could come back to haunt us.

Actually, a big part of the decision as to what to use depends on the environment.

In another part of Maryland, they use a lot of GI conduit for signal cables. (I'm thinking of a major industrial facility (steel plant / shipyard) at Sparrows Point.)

Hi rhkramer of course your right. The environment plays a big part. I think though that if I was running any conduit in a steel mill or a ship yard it wouldn't be PVC unless it was buried.

Then the Abdul has not given his use. He did ask for recommendations and why not.

That is what wireways were made for - to eliminate the stress of pulling cables around corners.

On one job I did, I had to pull 16 signal cables of about 0.28" diameter through 2" GI (PVC coated version) for a 25' run with two 90 degree elbows, and, although the cross sectional area was under the recommended 40% fill, I thought I was going to pull the cables apart. Wireways are much better. If you must use conduit, over size it well above the 40% recommendation for fill.

They make cable pulling lubricant for easing the pull of cables into conduit.