Installing a 40 circuit panel in a 2 story home and will be running quite a few circuits out of it. The panel will be behind 1/2" sheetrock, and some of the openings for wire on top and bottom of the panel are too close to the front to meet code (1-1/4" min. from face of stud) ... if I used those nearest the front, the wire would just barely be behind the sheetrock when it's put on. The 1/2" box connectors I'm using are big enough to accomodate two 12-2 NM wires through them, but is that against code? Can you run two 12-2 wires through a single box connector? Can't find anything about it in the NEC. Otherwise, it's going to be nearly impossible for someone to use all 40 circuits in a 40 space panel, if they had to.