Test & Measurement
NEMA ADP 2-2013 on circuit breaker systems testing
By Alyssa Dalton
December 19, 2013 – The National Electrical Manufacturers Association (NEMA) has published a white paper, NEMA ADP 2-2013 Molded Case Circuit Breaker Systems Testing with Conductors.
Molded case circuit breakers are designed to protect rated conductors and in particular, insulated wire, says NEMA, adding that it is necessary to test circuit breakers with wire to demonstrate that protection. NEMA ADP 2 discusses the necessity to test circuit breakers with wire to demonstrate that protection. The standard tests (as defined in UL 489) include overload and thermal tests, endurance followed by low level short circuit interrupting tests, and standard low level short circuit interrupting tests.