On new homes I have seen Romex run thru same holes the plumbers use for their Pex tubing (Red & Blue Plastic). Is this a common thing to do? Sometimes the plumbers drill 2" or 3" holes thru these laminated I beams, there is plenty of space around the pipes for Romex to go thru, but is it wise? I always drill separate holes for my Romex or use the prepunched holes. Just wondering!
By sharing the holes, you may subject the NM cable to abuse and stresses. It may not be strictly forbidden, but it is not a good practice. I wish I could say I have never done it myself. I can say I never was proud of the jobs where I had to do it. (Sometimes your boss, or even the general contractor, has the last word on the quality of the job we do.) Oh, well. Most of the work that gets installed out there never gets inspected. We are the first and last inspector of our own work. Have you ever hit a staple too hard and damaged the sheathing? Did you then remove that section of NM and replace it? Or did you merely tape it, or worse, ignored it?