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UL 489 vs UL 1077 Circuit Breaker Standards Guide
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This document explains the critical differences between UL 489 (Branch Circuit Protection) and UL 1077 (Supplementary Protection) standards for circuit breakers, detailing their functions, applications, and features. It also provides specifications for Gladiator miniature circuit breakers, including trip characteristics (B, C, D curves), ratings, and proper usage according to NEC and CEC codes.
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