What is the minimum depth required for electrical cables installed near bodies of water if not specified?

The minimum depth required for electrical cables installed near bodies of water is specified in the National Electrical Code (NEC) to ensure safety and reduce the risk of damage to the cable and electrical failures. When no specific depth is noted, the NEC typically requires that buried cables be installed at a minimum depth of 6 inches below the surface.

This minimum depth helps protect cables from potential physical damage as well as environmental factors, such as the activity of animals or water erosion. In areas near bodies of water, conditions can alter soil stability and moisture content, making it essential for the cables to be sufficiently buried to maintain safety and functionality.

Other depths provided in the choices do not align with the NEC requirements for general installations or may pertain to different situations that require greater burial depths, such as for certain cable types or uses. Therefore, the choice of 6 inches best reflects the NEC's guidance for typical cable installations near water bodies when specific depths are not further defined.