I like to install a recessed light switch in between wall studs next to a door but the stud bay (6" studs and 16" on center) already has a vertical
3/4"natural gas, 3/4" PVC (for the HVAC) and 3" waste pipes in it. The wiring will be romax and switch and pipes will be enclosed with sheet rock and insulation. Is this permissible by NEC?