Hello. I am wiring a 10,000 square-foot home in Georgia. Everything is wood framed except for a porch which is framed with steel. There will be wood blocking installed underneath in order to attach the tongue and groove boards. Am I allowed to use romex or will I be required to use MC wiring? There will be 3 patio heaters, 2 ceiling fans and 14 recessed cans.
New home w/steel framed porch. Romex?
- Thread starter wlifsey
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LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Welcome to the forum.
Where in the structure? Exposed or enclosed? Under the deck? Under the roof?
Generally speaking, if you can't use NM because of weather, you'd use UF cable.
MC cable is more for physical protection, or use PVC conduit for exposed work.
Where in the structure? Exposed or enclosed? Under the deck? Under the roof?
Generally speaking, if you can't use NM because of weather, you'd use UF cable.
MC cable is more for physical protection, or use PVC conduit for exposed work.
Hi Larry. It is a deck off of the main floor of the home. Built with 1/4” steel beams and the platform is 1-4” steel I-beams. On top is the galvanized steel sheets with 4” of concrete on top. The I-beams will be wrapped with 2x4 framing so that tongue and groove can be installed. There will be the ability to wire the cans, fans and heaters without the romex coming into direct contact the steel.
rc/retired
Senior Member
- Location
- Bellvue, Colorado
- Occupation
- Master Electrician/Inspector retired
Romex, type NM-B cable, is fine.
Ron
Ron
MC has the same requirements of protection from physical damage as NM cable.
Gonna have to disagree here….
Comparing .15 on these two, there’s not a (B) or a (C) in the .15 requirements of Article 330.
jaggedben
Senior Member
- Location
- Northern California
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- Solar and Energy Storage Installer
The steel structure makes no difference to anything.
Still unclear to me if the location is outdoors, i.e. if you'd be running the wiring in a wet location. If yes, then NM is not allowed, but UF is allowed like Larry said.
Seven-Delta-FortyOne
Goin’ Down In Flames........
- Location
- Humboldt
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- EC and GC
Steel framing vs wood framing has nothing to do with where NM can be used.
Review article 334
Review article 334
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Since it's concealed within the steel structure you can use NM cable. Where it passes through metal framing members you'll need a bushing.
Thank you all. This is exterior on the basement level. Steel and concrete above with steel structure. It will be wrapped in 2 x 4 for framing purposes and for tongue and groove ceilings. It will be completely enclosed so there will be no chance of water or moisture getting inside.
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