Molded-Case Circuit Breakers, Molded Case Switches, and Circuit-Breaker Enclosures
This standard is no longer for sale on the NEMA website. NEMA AB 1 is equivalent to the current edition of UL 489.
To purchase this standard, click here or contact IHS at 800-854-7179 or 303-397-7956 (outside the U.S.)
NEMA AB 1