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

The minimum cover requirement for rigid metal conduit that is directly buried outdoors is indeed 6 inches. This specification is based on the National Electrical Code (NEC) as well as local codes, which dictate that rigid metal conduit must be buried at a sufficient depth to protect it from physical damage and to avoid interference with other underground installations or activities.

When rigid metal conduit is used underground, it's critical to ensure that it is properly protected from environmental factors and soil movement. A cover of 6 inches provides a buffer against accidental disturbances, such as digging or ground settling, which could potentially damage the conduit. This standard helps in maintaining the integrity of the electrical system and ensuring the safety of both the electrical installation and any excavation activities that may occur in the surrounding area.

Understanding the importance of these depth requirements is essential for safe electrical installations and adhering to relevant codes. In cases where the conduit is subjected to possible physical damage, additional cover requirements may apply; however, standard direct burial typically mandates this 6-inch minimum for protection purposes.