What is a requirement for the cover depth of a rigid metal conduit installed underground?

The requirement for the cover depth of a rigid metal conduit installed underground is at least 24 inches. This specification is important because it ensures adequate protection of the conduit from physical damage, as well as from mechanical excavation activities that might occur in the vicinity. Different installations demand varying depths based on factors like the environment, potential for physical interference, and specific conditions outlined by electrical codes and regulations.

The choice of 24 inches as a minimum depth balances safety and practicality, providing enough coverage to protect the conduit while allowing for maintenance access when necessary. Above this depth, the risk of damage due to surface activities, such as digging or construction, increases, making the 24-inch requirement a critical standard for underground installations of rigid metal conduit. Adhering to this standard helps ensure that electrical systems remain safe and operational in the long term.