At what depth must underground feeder (UF) cable be buried?

The correct answer indicates that underground feeder (UF) cable must be buried at a depth of 24 inches below grade in order to provide sufficient protection from physical damage and environmental factors. This depth is crucial because it helps prevent accidental exposure to the cable from the surface, such as during landscaping or construction activities. Adhering to this requirement helps ensure the safety and reliability of the electrical system.

Additionally, local codes and regulations specify these minimum burial depths to account for different soil types and potential hazards that may exist above ground. Proper installation at this depth also helps guard against frost heave and other soil movement that could damage the cable over time.