Code question - Romex in Conduit

[perrykw]

Here's my situation:

I need to get (3) 12/2 runs and (1) 10/3 run to my breaker panel. A few years ago I had my main service upgraded and now have an outdoor panel (long story). I have 2 1/2 inch conduit running from the top of the panel to the attic, and have another 2 1/2 inch conduit running from the bottom of the new panel back to the old panel (used by the electrician as a junction box to connect the old circuits)

I keep reading that it's not allowed to run Romex in conduit in most cases. Would it be ok to do so for those circuits to get them the short distance from the attic to the panel (2 to 3 feet) or should I drop the romex into the old panel (now the J box) and then run THHN to the new panel?

Thanks

 

[wyliesdiesels]

Theres lots of BS out there.

The only location you cant run NM-b aka Romex in conduit is outside.

 

[perrykw]

Theres lots of BS out there.

The only location you cant run NM-b aka Romex in conduit is outside.

So from a code perspective, is the short run from the breaker panel to the attic considered "outside" since I have an outdoor panel or are we talking running conduit underground, etc? The reason this Romex thing took me by surprise is an electrician is the one that installed the conduit from the panel to the attic to allow for future upgrades.

 

[wyliesdiesels]

So from a code perspective, is the short run from the breaker panel to the attic considered "outside" since I have an outdoor panel or are we talking running conduit underground, etc? The reason this Romex thing took me by surprise is an electrician is the one that installed the conduit from the panel to the attic to allow for future upgrades.

Well is the conduit outside the building or inside?

 

[perrykw]

Well is the conduit outside the building or inside?

Yes. It's an outdoor breaker panel and there is conduit running from the top of the breaker panel through the soffitt into the attic

 

[rlitman]

Yes. It's an outdoor breaker panel and there is conduit running from the top of the breaker panel through the soffitt into the attic

So you just answered your own question. No NM-B in an outdoor conduit.

You could use UF (aka NM-C), though I suspect that you would want to re-think that after you realize that the conduit fill calculation for these cable systems is pretty awful.

 

[perrykw]

So you just answered your own question. No NM-B in an outdoor conduit.

You could use UF (aka NM-C), though I suspect that you would want to re-think that after you realize that the conduit fill calculation for these cable systems is pretty awful.

Thanks. Looks like I'll just run NM to the old breaker panel that's being used as a junction box and then run THHN through the conduit to the new panel.

 

[wyliesdiesels]

Yes. It's an outdoor breaker panel and there is conduit running from the top of the breaker panel through the soffitt into the attic

That didnt really answer the question.

Since we have no pictures In my mind you could either have a flush mounted panel with the conduit going inside the wall or it could be surface mounted with the conduit outside.

If the conduit is outside then no go.