My father in law (who used to be a licensed) can't remember exactly the right way to finish this off. We had a builder run some THHN for some new outdoor lights. He terminated at the outdoor Jbox and we now have to bring it to the new subpanel, which is indoor in the basement of course. It is just a simple 20 amp circuit. Do we JUST make the connection with the Romex in the outdoor (weather proof I should add) Jbox and then run the internal wire as we would normally run a circuit, or do we have to run conduit from the Jbox to the subpanel. My in law thinks we can just run the normal romex straight to the box with no conduit just like all the rest of the interior circuits. Hope this makes sense.... Any further clarification just ask.