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Do Schneider circuit breakers conform to NEMA AB1?

Published date: 18 May 2020

Issue:
Do Square D circuit breakers meet the requirements of NEMA AB-1?

Product Line:
Molded Case Circuit Breakers

Environment:
Electrical Distribution Systems

Cause:
Standards

Resolution:
Yes, Schneider Electric thermal magnetic circuit breakers conform to the requirements of NEMA AB1.

In 1999, NEMA AB1 was harmonized with UL 489.  At that time, it effectively superceded NEMA AB1, and NEMA AB1 is no longer an active standard.
 

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