Walrus,
The concept is great. Problem is the TGI floor joist come in longer lengths to the lumber yard than most customers need. They at the lumber yard then cut them for size with a chain saw type tool. This can put the holes back and forth in a wire run as much as eight inches or so. Add to that every time one is used in a different side up to the floor, then the vertical alignment doesn't line up with the run either. I have seen some installations where they were used anyway, and it didn't look good. Besides the look, think about making the 3rd, 4th, and 5th pulls through these staggard holes. Like pulling romex with someone on the other end holding it back for every turn. These holes are generally close to the center of the joist and the heating men have a hard time putting their six inch ducts perpendicular to these cable runs. Sometimes pulling a little slack from both dirrections works for them, but with these misaligned holes there is no pulling of slack without a come along.
As for the Wisconsin code being adopted and enforced, it ususally takes about one year for all the suits to make up their minds on all the details and send out their com. 16 State adoption to the NEC. In the time they are deciding, we continue to go by the previous accepted code. The rumors that I have heard have it that the suits have still not come to terms with the Arc Fault Circuit Interupters, especially with all the new reports of them not working as they should.
