Multiple conductors through same opening in panel

[brian_mller]

Been tusseling with a builder out in bubba-land....

I informed the builder that multiple electrical conductors through the same opening in the panels is not allowed...could I be wrong? I don't think I am, but struggle to find it in the NEC.

 

[GoldDigger]

Multiple conductors, and even multiple circuits, in one opening are definitely allowed. And may be good design.
On the other hand NM entering a panel through a sleeve or other opening without a clamp may be a problem. Likely is a problem with the NM runs in your photo. Alsoentially a wire fill and derating issue.
And service conductors cannot share a raceway with non-service (OCPD protected) conductors. Bottom entry point looks fine in that respect.

More thoughts if you can provide more details.

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[Dennis Alwon]

The picture is a code violation but it has been an accepted install around here since before I moved here in 1978. It is also common in other states -Arizona, Tx etc...but it is not compliant and is usually done when there is an outdoor panel.

 

[brian_mller]

Thank!