How deep must RMC be buried when covered with 2 inches of concrete?

When it comes to the burial depth of rigid metal conduit (RMC) under concrete, the National Electrical Code (NEC) provides specific guidance. For RMC placed under concrete, it must be buried to a depth that ensures proper protection and functionality. If the conduit is covered with at least 2 inches of concrete, the required burial depth is 6 inches.

This requirement serves to protect the conduit from physical damage while ensuring compliance with safety standards. The 6-inch depth along with the 2 inches of concrete provides adequate coverage to shield the conduit from impact and other potential hazards that might be present at ground level or due to surface activity.

It's important to note that the depth requirements can vary based on different installation conditions, such as whether the conduit is buried in earth, covered with concrete, or located in other environments. However, when specifically looking at the provided scenario of RMC covered by 2 inches of concrete, the regulation explicitly states that a 6-inch burial depth is sufficient for proper protection.