TM 9-4120-399-14
b. T e s t .
(1) AC circuit breaker.
(a) With breaker in ON position, check for continuity across terminals A1 and A2,
and B1 and B2.
(b) With circuit breaker in OFF position, check for discontinuity between A1 and
A2, and B1 and B2.
(c) If circuit breaker fails either test in steps (a) or (b), replace breaker.
