The use of "NM" cable

[kevinware]

As defined by article 100 a "damp location" is one protected from weather and not subject to saturation with water or other liquids but subject to moderate degrees of moisture. Would a crawl space under a house fall under this definition? Article 334.10(A)(1) states (A)"type NM cable shall be permitted as follows"
(1) For both exposed and concealed work in normally dry locations except as prohibited in 334.10(3). Section 334.10(B)(1) states the NMC cable shall be permitted in both exposed and concealed work in dry, moist, damp, or corrosive locations, except as prohibited in 334.10(3). Does the NEC by definition require me to use "NMC" in the crawl space or can I use "NM cable"????

Thanks for all your help,

Kevin

 

[steve66]

Re: The use of "NM" cable

My personal opinion: You are ok if the wire is supported from the bottom of the joists. There the wire wouldn't be subject to moisture, just some humidity.

If you are laying it on the ground, I think that would be a damp or even wet location.

Steve