What is the maximum vertical distance for cables or raceways to the top of metal-corrugated decking?

The maximum vertical distance for cables or raceways to the top of metal-corrugated decking is set to ensure safety and proper installation practices. A vertical clearance of 2 inches provides adequate spacing that helps prevent damage to the cables or raceways caused by physical contact with the decking, while also accommodating any necessary ventilation or potential thermal expansion.

This standard is critical in maintaining the performance and longevity of the electrical systems, as insufficient clearance may lead to wear, overheating, or even electrical faults due to restricted airflow or physical pressure. Recognizing the need for an appropriate distance helps electrical professionals meet safety codes and maintain the integrity of wiring installations in various environments.