In a vertical raceway, 1/0 AWG copper conductors must be supported at intervals not exceeding how many feet?

In a vertical raceway, 1/0 AWG copper conductors must be supported at intervals not exceeding how many feet?

• A. 100 feet
• B. 75 feet
• C. 125 feet
• D. 50 feet

Answer: (A)

In vertical raceways, the distance between supports is set to keep the raceway and conductors secure while allowing a practical, code-compliant installation. For 1/0 AWG copper conductors, the maximum interval is 100 feet. This spacing reflects the mechanical strength and stiffness of large conductors being run vertically, which allows longer spans between supports without excessive sag or stress on fittings. Shorter spacings like 50 or 75 feet would be more conservative than required, while 125 feet would go beyond the allowed limit for this conductor size in a vertical run. So, the allowed maximum between supports is 100 feet.

In vertical raceways, the distance between supports is set to keep the raceway and conductors secure while allowing a practical, code-compliant installation. For 1/0 AWG copper conductors, the maximum interval is 100 feet. This spacing reflects the mechanical strength and stiffness of large conductors being run vertically, which allows longer spans between supports without excessive sag or stress on fittings. Shorter spacings like 50 or 75 feet would be more conservative than required, while 125 feet would go beyond the allowed limit for this conductor size in a vertical run. So, the allowed maximum between supports is 100 feet.