When installing PVC conduit underground without concrete cover, what is the minimum amount of cover required?

The correct answer indicates that a minimum of 18 inches of cover is required for PVC conduit installed underground without concrete cover. This requirement is established to ensure that the conduit is adequately protected from physical damage caused by surface loads or disturbances. The 18-inch depth strikes a balance between accessibility for maintenance and installation while providing sufficient protection against the potential for mechanical impact and ground settling.

Choosing this depth recognizes common environmental factors and the practical realities of excavation activities. Above this depth, the risk of accidental damage from everyday activities like landscaping or construction is increased. By adhering to this standard, installers help ensure the integrity and longevity of the conduit system, preventing situations where the conduit might become exposed or damaged, which could lead to electrical faults or failures.