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-   -   Power to basement via conduit outside of house? (http://www.diychatroom.com/f18/power-basement-via-conduit-outside-house-99891/)

b_corwin 03-28-2011 08:25 PM

Power to basement via conduit outside of house?
 
Hi all,
Another quick electrical question. I need to get more power into my basement and think I have a plan for how to do it.

The panel is in an attached garage that is on a slab. Present wiring to the basement runs laterally inside walls into the house where it goes into the basement. This pathway is well covered and inaccessible.

However, there is a clear pathway on the outside of an exterior wall. My question is, can I run a piece of romex out of the panel and through the exterior wall into a jbox rated for outside usage. Then, can I run conduit from this box to another box on this exterior wall, and then bring the wires into the basement?

Is this plan ok? I would run romex from the panel to the first box, then run thhn in the conduit on the exterior wall, then bring a romex back into the basement.

Thoughts?

Thanks much
Brian

Saturday Cowboy 03-28-2011 09:05 PM

romex can not be outside even in a pipe. but you could use another wire type such as uf, or transition to another wiring method. but yes the outside piping is a good method

b_corwin 03-28-2011 09:16 PM

Right
 
Right, I forgot to mention that. I have run conduit before in my garage for lighting and ran stranded thhn through the conduit.

But other than that my plan sounds ok? Do I need to use any special sort of fittings to connect my conduit because its outside? Can I use EMT or do I need to use plastic conduit?

Thanks much
Brian

secutanudu 03-28-2011 10:42 PM

You need THWN if it's outside in conduit, not THHN. Most wire is rated for both, and will say THHN/THWN on the jacket.

b_corwin 03-28-2011 10:55 PM

Thanks secutanudu, you seem right all the wire I have here is both thhn and thwn. Thank you

B

Saturday Cowboy 03-29-2011 10:22 AM

I like pvc outside because i believe that it is more inherently water proof but it doesn't do so good in the sun, tho a good coat of paint will take care of that and help blend in with he house.

If you wish to use EMT you must use WP fittings.


Why does everybody just all over the distinction between THWN and THHN? everybody knows that it's all dual rated and it is so much easier to tell folks one thing and it is easier to find at home depot because most employees don't know the difference.


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