NEC Practice Exam Questions
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Avg score: 0% • Most missed: “In enclosures, Class 2 and 3 circuits are permitted to be installed in a raceway…”

Format: Most exams are open-book and consist of 80 to 100 multiple-choice questions.
Time Limit: You generally have between 3 to 5.5 hours depending on the specific license type.
Core Topics: Questions typically cover wiring methods, grounding and bonding, load calculations, and overcurrent protection. 

NEC Practice Exam Questions
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25 Questions

1. Raceways are to be provided with expansion fittings where necessary to compensate for thermal expansion and contraction
2. Underground minimum cover required for rigid conduit, except in certain specified locations, is
3. Compliance with the Code ensures a system that is efficient, convenient, and adequate for good service or future expansion of electrical use.
4. Conductors and optical fibers located in elevator hoistways may be installed in
5. Which of the following statements is true?
6. Extracted material from other sources
7. Branch circuits that supply neon tubing installations are not to be rated in excess of ____ amperes
8. Where the opening of a crane control circuit would create a hazard, such as, for example, the control circuit of a hot-metal crane, the control-circuit conductors are to be considered as being properly protected by the branch-circuit overcurrent devices.
9. Arc-flash hazard warning labels are required in nondwellings for
10. In enclosures, Class 2 and 3 circuits are permitted to be installed in a raceway to separate them from Class 1 non-power-limited fire alarm and medium-power network-powered broadband communication circuits.
11. Conductors that supply a single motor used in a continuous-duty application are to have an ampacity of not less than ____ percent of the motor full-load current rating.
12. In Class II locations, ventilating pipes for motors, generators, or other rotating electrical machinery or for enclosures for electrical equipment are to
13. Conductors for small motors are not to be smaller than ____ AWG.
14. Motors are to be located so that adequate ventilation is provided. An exception is
15. Vehicle-mounted generators always require a ground rod.
16. A nonincendive circuit is a protection technique not permitted for
17. Size 4 AWG or larger insulated grounded conductors are to be identified by
18. For a multispeed motor, the selection of branch-circuit conductors on the line side of the controller is to be based on the highest of the full-load current ratings shown on the motor nameplate.
19. A combustible dust is any finely divided solid material that is ____ microns or smaller in diameter and presents a fire or explosion hazard when dispersed and ignited in air.
20. The feeder demand factor for four elevators is
21. Motor markings are to include
22. In an elevator machine room, required lighting
23. Which of the following statements is true?
24. Equipment that is readily accessible includes
25. At least one 125-V, single-phase, 15- or 20-A duplex receptacle is to be provided in each

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