How Well Do You Know Chapter 4?

This quiz tests your knowledge on Article 430, Motors, Motor Circuits and Controllers, and adjacent articles.

1. Which NEC article is applied for a hermetic motor refrigerant compressor?

430

406

450

440

Correct Answer: 440

2. Section 430.8 requires using the tables in Article 430 for sizing circuit conductors.

True

False

Correct Answer: False

3. Three important elements to achieving a proper motor installation include branch-circuit sizing, overload protection and a branch-circuit short-circuit ground-fault protective device.

True

False

Correct Answer: True

4. The information on a motor nameplate is important because the nameplate voltage and horsepower ratings are needed to use the table in Article 450.

True

False

Correct Answer: False

5. What part of Article 430 covers the requirements for sizing the branch-circuit conductors for single and groups of motors?

III

Correct Answer: II

6. Conductors supplying a single motor used in a continuous-duty application shall have an ampacity of not less than ______% of the motor’s full-load current rating.

150

125

Correct Answer: 125

7. Requirements for motor branch-circuit short-circuit and ground-fault protection are found in part ______ of Article 430.

III

Correct Answer: IV

8. Part IV of Article 430 indicates the requirements of Article 240 do not apply to motor installations.

True

False

Correct Answer: False

9. Overload protection also provides protection against short-circuits and ground-faults.

True

False

Correct Answer: False

10. Example included in Appendix provides information to assist in the understanding and application of the overcurrent protection requirements of motors and motor circuits.

R7, R

D8, D

D6, D

L9, L

Correct Answer: D8, D

Email me the Quiz results

Score:

How Well Do You Know Chapter 4?

1. Which NEC article is applied for a hermetic motor refrigerant compressor?

2. Section 430.8 requires using the tables in Article 430 for sizing circuit conductors.

3. Three important elements to achieving a proper motor installation include branch-circuit sizing, overload protection and a branch-circuit short-circuit ground-fault protective device.

4. The information on a motor nameplate is important because the nameplate voltage and horsepower ratings are needed to use the table in Article 450.

5. What part of Article 430 covers the requirements for sizing the branch-circuit conductors for single and groups of motors?

6. Conductors supplying a single motor used in a continuous-duty application shall have an ampacity of not less than ______% of the motor’s full-load current rating.

7. Requirements for motor branch-circuit short-circuit and ground-fault protection are found in part ______ of Article 430.

8. Part IV of Article 430 indicates the requirements of Article 240 do not apply to motor installations.

9. Overload protection also provides protection against short-circuits and ground-faults.

10. Example ______ included in Appendix ______ provides information to assist in the understanding and application of the overcurrent protection requirements of motors and motor circuits.

10. Example included in Appendix provides information to assist in the understanding and application of the overcurrent protection requirements of motors and motor circuits.