I haven't checked this particular installation yet, but in their other conduit runs, they are using 1 1/4 condulets with RE bushings. The OZ 1 1/4 T condulet is listed at 32 cu. in.
txsparky, Just to let you know, the work in question is happening at the DFW Airport. You aren't the electrical contractor are you??? By the way, I live in Bedford.....
I got the Bedford from your profile and just assumed the work was in that general area.The airport may have stricter codes from FAA.Not sure though. I'm in Spring,just north of Houston,but I'll be in Plano tommorrow.