The minimum bending radius for 3-inch rigid conduit is_________ inches.

The minimum bending radius for a 3-inch rigid conduit is 13 inches, as specified in the National Electrical Code (NEC) guidelines. This measurement is essential because it ensures the integrity of the conduit when it is bent, preventing damage to the conduit itself and ensuring that any conductors inside are not subjected to undue stress that could lead to insulation failure or other issues.

Maintaining the correct bending radius is crucial for safe and efficient electrical installations. When a conduit is bent too sharply, it can compromise its structural integrity and affect the conductors housed within. The 13-inch radius allows for a gentle curve that facilitates easier pulling of wires and reduces the risk of kinks or breaks.

Understanding these specifications helps electricians and installers comply with safety standards and ensures that electrical systems function correctly over their intended lifespan.