Nice discussion. Thank-you everyone. Now, my dilemma, since I now see the importance of EMT, is to decide if I want to fix the errors that I made when I brought the PV wires into the house. The external PVC looks beautiful, to include slip couplings. From the inside, it also looks nice. The EMT came out great. However, the transition from PVC to EMT is in a nearly unreachable location, so I let the PV10 stay without any PVC-to-EMT transition box or adapter. The PV10 goes about 6 inches through the wall without any protection. Stupid, I know, now. As crazy as it sounds, I might be able reach in that small space and wrap the wires together with foil. Kludgy and shameful, and no inspector would ever pass it, but we don't do much for inspection around these parts. Thoughts, including shaming, is appreciated!