When is the use of cable assemblies instead of conductors permitted?

The use of cable assemblies instead of individual conductors is permitted where specifically allowed by the National Electrical Code. This refers to instances outlined in the NEC where cable assemblies meet certain requirements for installation, which may include considerations for safety, accessibility, and appropriate applications in different types of environments. For example, specific sections of the code detail where and how different types of cable assemblies can be utilized, including conditions under which they are suitable for particular installations.

Utilizing cable assemblies can offer benefits such as ease of installation, reduced risk of accidental damage to individual conductors, and enhanced protection of the wiring system. However, the NEC's stipulations ensure that such instances are clearly defined, maintaining safety standards across residential, commercial, and industrial applications.

The other options, while relevant in the broader scope of electrical installations, do not encapsulate the essence of the NEC's regulations regarding the use of cable assemblies. Hence, the choice indicating that cable assemblies are permitted where specifically allowed by the NEC is the most accurate and ties directly into the code's requirements and guidelines.