What is the minimum cover for rigid metal conduit that is directly buried outdoors?

The minimum cover for rigid metal conduit that is directly buried outdoors is 6 inches. This requirement is outlined in the National Electrical Code (NEC), which provides guidelines to ensure the safety and integrity of electrical installations.

When rigid metal conduit is buried directly underground, proper cover is critical to protect it from physical damage and environmental factors. If the coupling or conduit is not adequately covered, it can be susceptible to impacts from surface activities such as landscaping, vehicular traffic, or other disturbances.

The NEC standard allows for a minimum of 6 inches of cover as this depth offers a significant safeguard against accidental damage while still allowing for practical installation and maintenance. Deeper cover may be required in certain circumstances, particularly in areas where there may be frequent digging or other activities that could disturb the ground above the conduit. However, the established minimum is designed to balance safety with practicality.