I moved to ND and opened up a wall today and I saw THHN used in the wall with no conduit. There's no THHN at the breaker panel so he must have spliced it somewhere? I found a forum that said you had to use THHN in a conduit even interior to a home because of section 300.3(a). I no longer have access to the NEC so I was wondering if someone could find that and put it on here. My next questions are, can you have THHN run into a break panel? To meet code, do you really have to use conduit on THHN interior to a house (in floor joists), for wiring to fans and outlets and the such? What possible reason is there to have conduit on the THHN when you don't on Romex? Is there any type of wrap on conduit that would satisfy the could I might be able to put on after the fact, maybe like a tape?? or maybe something like http://www.directindustry.com/prod/hellermanntyton-usa/corrugated-wiring-protective-conduits-31061-653667.html Does anyone know of a free site I could access the NEC?