module 5 NCCER level 3 2023 Questions Solved 100% Correct

Where are the overcurrent protective devices normally installed in a branch circuit? - ANSWER-Where the branch circuit receives its supply What sit he maximum number of circuit breakers or sets of fuses that may be used as the service disconnecting means in a main service panel without a main switch - ANSWER-6 To prevent the normal motor starting current from affecting the fuse operation, non-time delay fuses can be sized at ____ - ANSWER-300% For 480V circuits, the available arc current seldom exceeds ____ percentage - ANSWER-60 The recommended method of detecting short circuit currents is the _____ method - ANSWER-point to point Types of fault current include overloads, short circuits, ground faults, and ____ - ANSWER-arc faults UL Class R fuses have a short circuit interrupting rating of up to _____ - ANSWER-200,000 amps A feeder circuit with no motor load has a continuous load of 5 amps. and a noncontinuous load of 5 amps. The feeder overcurrent protective device should be sized at ____ - ANSWER-(11.25) 15 True of False. The voltage rating of a fuse can be lower than the circuit voltage but never higher - ANSWER-False (The voltage rating can be higher but never lower) True of False. The magnetic portion of a standard circuit breaker prevents the device from tripping due to a short circuit - ANSWER-False (It allows the device to trip due to short circuit) A feeder circuit with no motor load has a continuous of 10 amps and a noncontinuous load of 10 amps. The feeder overcurrent protective device should be sized at ____ amps - ANSWER-(22.5) 30 True or False. Reliability is within the basic scope of Underwriters Laboratories work - ANSWER-False (Safety is the primary consideration of UL)