What is an acceptable use for nonmetallic sheathed cable?

Nonmetallic sheathed cable, commonly referred to as NM cable or Romex, is primarily designed for use in building applications where the cable is protected from physical damage. The correct use of this type of cable includes the stipulation that it is suitable for both dry and damp locations.

Using nonmetallic sheathed cable in both dry and damp locations allows for flexibility in residential and light commercial wiring applications. This cabling is insulated in a way that it can deal with the environmental conditions present in these areas, provided that it is not subjected to direct exposure to water or extreme moisture.

On the other hand, while it is true that nonmetallic sheathed cable can be used in dry locations, this option does not encompass the broader scope of acceptable uses that include damp environments. Outdoor installations might require different types of cables with specific ratings for moisture and UV exposure, making that option less suitable. Additionally, while it might seem plausible to use NM cable in concrete slabs, it is generally not recommended unless specifically approved by the relevant codes, as the concrete could maintain moisture against the cable in a manner that is damaging.

Therefore, the primary consideration for using nonmetallic sheathed cable includes its versatility in various environments, as long as the installation