At what intervals must vertical runs of a metal wireway be securely supported?

Vertical runs of a metal wireway must be securely supported at regular intervals to ensure safety and stability. The correct interval for support is 15 feet. This requirement is set to prevent excessive strain and movement on the wireway, which can lead to damage or misalignment. Proper support ensures that the wireway maintains its structural integrity, reduces the risk of electrical hazards, and complies with electrical codes and standards. Additionally, following these guidelines helps in maintaining a neat and organized installation, which is vital for maintenance and future modifications.