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NEC Code 430: Motor Circuit Conductors Quiz Questions Answers
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Question 1 of 10
1. Question
1 pointsIn case of wound rotor motor where the secondary resistor is separate from the controller, the ampacity of the conductors between controller and heavy starting duty resistor type shall not be less than ____ of percentage full load secondary current
Correct
Please Refer: NEC Code 430.23(C)
Incorrect
Please Refer: NEC Code 430.23(C)
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Question 2 of 10
2. Question
1 pointsConductors that supply a single motor used in a continuous duty application shall have an ampacity of not less than _____ of the motor full-load current rating:
Correct
Please Refer NEC Code 430.22
Incorrect
Please Refer NEC Code 430.22
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Question 3 of 10
3. Question
1 pointsThe conductors between the field wiring output terminals of the single phase half wave type rectifier and the motor shall have an ampacity of not less than the _____ of the motor full load current rating:
Correct
Please Refer: NEC Code 430.22(A)(1)
Incorrect
Please Refer: NEC Code 430.22(A)(1)
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Question 4 of 10
4. Question
1 points_____ % is the nameplate current rating of 15 minutes rated motor used in Intermittent duty freight and passenger elevators
Correct
Please Refer :NEC Code Table 430.22(E)
Incorrect
Please Refer :NEC Code Table 430.22(E)
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Question 5 of 10
5. Question
1 points_____ % will be the nameplate current rating of 5 minutes rated motor used in short time duty operating valves and rising and lowering rolls applications:
Correct
Please Refer: NEC Code Table 430.22(E)
Incorrect
Please Refer: NEC Code Table 430.22(E)
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Question 6 of 10
6. Question
1 pointsFor a part-winding connected motor, the ampacity of the branch-circuit conductors on the
line side of the controller shall not be less than _____of the motor full-load current:Correct
Please Refer: NEC Code 430.22(D)
Incorrect
Please Refer: NEC Code 430.22(D)
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Question 7 of 10
7. Question
1 pointsFor a wye start, delta connected motor the ampacity of the conductors between the controller and the motor shall not be less than ____ of the motor full-load current rating
Correct
Please Refer: NEC Code 430.22(C)
Incorrect
Please Refer: NEC Code 430.22(C)
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Question 8 of 10
8. Question
1 pointsThe reduced-size feeder tap conductors are protected from overload by the terminal overcurrent device but protected from short-circuit (and ground-fault) only from the feeder overcurrent device.
Correct
Please Refer NEC Code 430.28 Exp -2
Incorrect
Please Refer NEC Code 430.28 Exp -2
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Question 9 of 10
9. Question
1 pointsWhere the tap conductors supply a motor load and do not exceed 25 ft, the ampacity of the tap conductors must be at least ___ that of the feeder conductor.
Correct
Please Refer: NEC Code 430.28 Exp
Incorrect
Please Refer: NEC Code 430.28 Exp
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Question 10 of 10
10. Question
1 pointsIn case of the conductors supplying several motor and other loads, the conductors ampacity shall not be less than ____ of the continuous non motor load:
Correct
Please Refer: NEC Code 430.24 (4)
Incorrect
Please Refer: NEC Code 430.24 (4)