Which of the following is a characteristic of underground feeder cables?

Underground feeder cables, commonly referred to as UF cables, are specifically designed for direct burial applications, meaning they must be installed underground and can be subject to environmental factors not present in above-ground wiring. One of the key characteristics of these cables is that they must adhere to certain burial depth requirements established by the National Electrical Code (NEC). These requirements ensure that the cables are sufficiently protected from physical damage and environmental conditions.

The NEC stipulates these depth requirements to enhance safety, minimize the risk of accidental damage, and ensure proper functioning of the electrical system buried underground. Understanding these regulations is crucial for compliance and safety in electrical installations.

In contrast, underground feeders are not exclusive to dry locations, can be buried underground without necessarily being encased in conduit, and do not require above-ground installation. Therefore, recognizing the specific burial depth requirements as a defining characteristic of these cables reflects an understanding of proper installation practices and regulatory standards.