NM Cable Exposed, Article 334

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tryinghard

tryinghard

Senior Member
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California
I thought NM could be run exposed above 8' but I cannot find anything to substantiate this?

I looked at 334-10, 334-15 and Article 300. Can NM be installed indoors in a residential environment surface above a curtain height?
 
tryinghard said:
I thought NM could be run exposed above 8' but I cannot find anything to substantiate this?

I looked at 334-10, 334-15 and Article 300. Can NM be installed indoors in a residential environment surface above a curtain height?
Click to expand...

Planning to run it over the windows ?
 
You can run it exposed at any height. The only dimensional requirements in the NEC are to protect it within 6" of coming through a floor.
 
It's there just not the hight or the chapter you would need.
Are you building a "manufactured home"?

550.15 Wiring Methods and Materials.Except as specifically limited in this section, the wiring methods and materials included in this Code shall be used in mobile homes. Aluminum conductors, aluminum alloy conductors, and aluminum core conductors such as copper-clad aluminum shall not be acceptable for use as branch-circuit wiring.
(A) Nonmetallic Boxes. Nonmetallic boxes shall be permitted only with nonmetallic cable or nonmetallic raceways.
(B) Nonmetallic Cable Protection. Nonmetallic cable located 380 mm (15 in.) or less above the floor, if exposed, shall be protected from physical damage by covering boards, guard strips, or raceways. Cable likely to be damaged by stowage shall be so protected in all cases.
 
mdshunk said:
You can run it exposed at any height. The only dimensional requirements in the NEC are to protect it within 6" of coming through a floor.
Click to expand...

And that is something I've never been able to understand or find an application for. Enlighten me please. It's been bugging me for years.
 
mdshunk said:
You can run it exposed at any height. The only dimensional requirements in the NEC are to protect it within 6" of coming through a floor.
Click to expand...

So maybe 334-15(B) is interpretive per application? Weird :roll:
 
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