St Louis goes so far as to ban multiple wires through any KO or even a hole drilled in a 2x4. Makes the top plate look like swiss cheese when feeding all home runs into the panel.
Used to be one cable per hole here too, but now allowed two... Depending on the hole, the cable and they need to be pulled together at the same time.
Mark Heller "Well - I oughta....." -Jackie Gleason
(among the other dishaps mentioned above) I think the romex "support" is only jacketing - thats fine to avoid induction - but bundling all of them in it is clearly way wrong. training, training, training
The way those panels are built, you have NO choice but to bundle,unless only running a limited number of circuits,my biggest gripe was w/ the rigid feeding the panel as its isolated/unbonded from panel because installer used a MA and a TA instead of locknuts to bring it into the panel.(The conduit was just shoved into the PVC fittings).
