Romex to conduit drops?

[alfy84]

Here is my plan for wiring my new post frame shop. I'm sure I will hear opinions on why I shouldn't wire my shop this way, but that's why I'm asking here. My new shop is bookshelf framed or some areas call it ladder framing. I will have a metal ceiling and metal wall panels inside. I plan on running romex through large conduit from the breaker box into the attic. From there I will make my runs with romex utilizing some attic junction boxes and do vertical drops down the outside of the walls where I want outlet boxes. Those drops will be in conduit. My lighting will be similar. Conduit drops to the switch, once in the attic make the romex runs to the lights. Thoughts?

 

[Wrench97]

Just run EMT and pull thhn though it.

 

[dscheidt]

Don’t run romex in conduit. It’s a pain to pull, and fills the pipe fast. Run conduit to the lights (or a box close, and use whips). That makes switching a lot easier if you want 3 ways, 0-10 diming, or to make changes to how the lights are banked after they are installed.

 

[JohnX14]

I wouldn't put junction boxes in attic. I'd pipe on the surface as the others suggested and pull thhn.

 

[mike93lx]

It'll frustrate the **** out of you and cost a bunch, but do emt for all of it. When you are done, you'll be glad you did and proud of the work.

 

[matt_i]

In my two shops I ran a large diameter trunk line conduit around the perimeter in the attic. About a hundred tees (lol). Past the initial wireway, I did it also for future-proofing. It's so easy to add something new, worst-case a few wires have to be unlanded and rolled back to cut in a new tee body. Thankfully done before copper had to be locked up at your local bank vault.

 

[Stuart in MN]

If the conduit drops from the attic down to the boxes are straight shots it won't be a big deal to run the romex through them.