Which statement regarding rigid conduit is correct?

Rigid conduit must be supported at regular intervals to ensure it remains secure and stable in its installation. The National Electrical Code (NEC) specifies the spacing requirements for supporting rigid conduit to prevent sagging or displacement over time. This stability is crucial for protecting the conductors within the conduit and maintaining the integrity of the electrical system.

In contrast, cutting rigid conduit at a 45-degree angle is unsuitable because cuts are typically made straight to ensure proper fittings and connections. Reaming the cut ends is necessary to remove sharp edges and burrs to prevent damage to the wires and ease the installation of fittings. Rigid conduit is designed to be strong and capable of withstanding various stresses, but it is not flexible; flexibility is a characteristic of other types of conduit, such as flexible metal conduit or EMT (Electrical Metallic Tubing). Thus, proper support of rigid conduit is essential for a safe and compliant electrical installation.