For which of the following electrical installations is it appropriate to use nonmetallic sheathed cable?

Nonmetallic sheathed cable, often referred to as NM cable or Romex, is designed for a variety of applications under specific conditions. It is composed of insulated conductors that are encased in a nonmetallic sheath. This type of cable is commonly used in both indoor and outdoor installations, provided that the outdoor applications meet certain weather-resistant requirements.

Using nonmetallic sheathed cable for indoor installations is widely accepted and prevalent in residential wiring for lighting, outlets, and other circuits due to its ease of handling and installation. When used outdoors, it is important to utilize a version that is rated for exterior exposure, such as UF cable (underground feeder), which is suitable for direct burial and can withstand moisture.

This versatility allows nonmetallic sheathed cable to be employed across a range of settings, resulting in its suitability for both indoor and outdoor applications where the appropriate types are utilized and local code requirements are observed. Therefore, the correct choice reflects this adaptability and compliance with electrical code regulations.