What defines a multiple conductor cable?

A multiple conductor cable is defined as a combination of two or more insulated conductors that are grouped together under a common jacket. This design serves several practical purposes, including enhanced protection of the conductors from environmental factors, easier handling and installation, and reduced electrical interference between the conductors. The common outer jacket helps keep the individual conductors organized and protects them from damage, ensuring better performance in electrical and communication applications.

In contrast to the correct choice, other options present configurations that do not fulfill the definition of a multiple conductor cable. For instance, a single insulated conductor describes only one conductor, while multiple conductors with no insulation would not be suited for safe electrical use, as insulated conductors are essential for preventing short circuits and ensuring user safety. Lastly, insulated conductors of different sizes do not necessarily form a composite cable if they are not bundled together under a single protective jacket. Thus, the combination of two or more insulated conductors under a common jacket distinctly characterizes multiple conductor cables.