Here is my case. I hired a contractor that wired 277 volt floesent fixtures. He added a 12 volt motion sensors on the circuit. Instead of placing the control box on a servicable wall he place them inside the first fixture under the canopy. Is this legal? I thought you could not mix wire voltages in the same box. As far as I know fixtures cant be used as a junction box? This is in a school in the State of Iowa.