While cutting holes for outlet boxes in new drywall, my contractor (ahem, me) managed to damage some wires in one of the outlet boxes with his RotoZip. Now there's not enough undamaged wire to meet the 6" Code requirement (there's about 4" left). What's the correct way for my electrician (ahem, also me) to address the wiring? I have to imagine that there's some safe/per-Code remedy to address something like this in a new construction situation without tearing off multiple sheets of drywall for a new wire run?
Location is Seattle, USA.
Thanks in advance for your answers. Please cite Code if you can!