The conductors, including splices and taps in metal surface raceway shall not fill the raceway to more than what percent of its area at that point?

The correct answer is that the conductors, splices, and taps in metal surface raceway should not fill the raceway to more than 50% of its area at that point. This percentage is established to ensure proper heat dissipation and to minimize the risk of overheating. Conductors generate heat during operation, and if the raceway is overfilled, it can lead to insufficient airflow and cooling, which may result in an unsafe operating temperature. Adhering to this guideline maintains safety and performance standards in electrical installations. This regulation reflects best practices in electrical design to ensure the longevity of the conductors and the safety of the electrical system as a whole.