2-42
A36. In emergency or essential circuits.
A37. Instantaneous, short time delay, and long time delay.
A38. It is the use of time delay ratings to cause the circuit breaker closest to the faulty circuit to trip.
This isolates the faulty circuit without affecting other circuits.
A39. CB1-long time delay; CB2, CB3-short time delay; CB4 through CB10-instantaneous.
A40. The power requirements of the circuit and the physical space available.
A41. A push button or push-pull circuit breaker (small size, low power).
A42. Check the applicable technical manual, obtain the approval of the electrical or engineering officer
(for shipboard circuit breakers), remove power from the circuit breaker, and tag the switch that
supplies power to the circuit breaker.
A43. Check the operating mechanism for smooth operation, check the contacts for pitting, check the
terminals for tightness and corrosion, check the mounting hardware for tightness and wear, check
all components for wear, and check the entire circuit breaker for cleanliness.
