According to NEC, what is the recommended maximum fill percentage for conduits with more than two conductors?

The recommended maximum fill percentage for conduits with more than two conductors, according to the National Electrical Code (NEC), is 40%. This guideline is established to ensure safe and efficient installation of electrical conduits. When the conduit is more than 40% filled, it can lead to increased heat dissipation issues, as the conductors have less space for air circulation, which is essential for cooling. Overheating can pose a risk of insulation degradation and potential failure of the conductors, ultimately leading to safety hazards such as fire risks. Therefore, adhering to the 40% fill limit helps maintain the integrity of the electrical system and promotes longevity and safety. It's essential for professionals in the field to understand and apply this recommendation correctly to ensure compliance with safety standards.