Joints in panel

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312.8 Enclosures for Switches or Overcurrent Devices
Enclosures for switches or overcurrent devices shall not be used as junction boxes, auxiliary gutters, or raceways for conductors feeding through or tapping off to other switches or overcurrent devices, unless adequate space for this purpose is provided. The conductors shall not fill the wiring space at any cross section to more than 40 percent of the cross-sectional area of the space, and the conductors, splices, and taps shall not fill the wiring space at any cross section to more than 75 percent of the cross-sectional area of that space.
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Thanks for all the replies. The way I'm seeing it is that I can do this as long as I stay withing the fill limitations. Some of the 12/2's are so short I don't know if they will make it to any breaker space. Like I said, I took this one over and it was really jak legged in.
 
Jim I have to go with bob on this one why can`t you set a sub and feed through the 1st panel???It`s not like it is part of a different system.No different than feeding a sub through a trough and routing circuits into the sub from the original panel
I am a neat freak in a panel and at all costs will not make a splice in a panel but sometimes it is necessary like down sizing wires for small lugged breakers.Why not set a trough above make all splices there and nipple in the new panel.To me that is the best remedy.When an inspector comes to a job almost 99% of the time the 1st thing is to inspect the panel and if it looks like s@#t then that is what the job will be judged as.When I started in 73 my journeyman told me a panel is an electricians signature .So make it pretty and he will overlook small things.
 
When I do a panel replacement, I almost always add a 12x12 JB and a nipple to keep the new panel neat. I also sometimes end up with a 1900 or 11B on the other end if the cables entered top and bottom.

Mark
 
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