Try five free Arizona electrical practice questions with answers and 2017 NEC references. This set uses the 2017 NEC for Arizona’s R-11 and C-11 trade-exam paths. The CR-11 dual classification uses the C-11 trade test. The separate Statutes and Rules Exam also needs preparation. Work with your code book open, record your answers, then open the explanations below.
Start with the Arizona exam guide for the official bulletin, approved books, exam format and registration steps.
Booked for R-11 or C-11? PSI grades Arizona code questions on the 2017 NEC only, and JCR's 2017 NEC package is built on that edition.
What you get for $495: step-by-step video lessons, JCR's study manual (2017 NEC edition) with a six-week plan, a printed mock exam booklet, digital practice exams and permanent code tabs, which the ROC outlines allow.
Which Arizona exam are you preparing for?
| Quick facts | Arizona electrical contractor exams |
|---|---|
| Test company | PSI, at a test center or online with a remote proctor (bulletin, February 18, 2026) |
| R-11 Residential | 110 questions, 240 minutes, 70% to pass (R-11 outline) |
| C-11 Commercial and CR-11 Dual | 110 questions, 240 minutes, 70% to pass (C-11/CR-11 outline) |
| Books | 2017 NEC, NFPA 72 (2016) and OSHA 29 CFR 1926. Permanent tabs only. |
| Statutes and Rules Exam | Open-book online course and exam through Gmetrix, $61 |
| PSI fees | $66 for one exam, $116 for two |
| Who tests | The qualifying party: the person who answers to the ROC for the company's license |
Confirm your ROC classification and PSI reference list. Arizona’s NASCLA alternative has a different reference list; this set follows the state trade-test edition.
Arizona electrical practice test: 5 questions
Use 15 minutes as a practice target. This is a short NEC lookup drill, not a full-length exam or a prediction of your score. Questions are selected from JCR’s practice bank and may also appear in other JCR state guides.
Question 1: GFCI in dwellings
A house has a finished basement family room and an unfinished storage area in the same basement. No other GFCI location rule or exception applies. Under the 2017 NEC, which general-purpose 125-volt, 15- and 20-amp basement receptacles need GFCI protection?
- Every receptacle in the basement
- Only the receptacles in the unfinished storage area
- Only receptacles within 6 feet of a sink
- None, if the basement is below grade
Question 2: Equipment grounding conductors
A 40-amp branch circuit uses 8 AWG copper, the smallest size with enough ampacity. For voltage drop, you upsize the circuit conductors to 6 AWG copper. What is the smallest copper equipment grounding conductor allowed?
- 12 AWG
- 10 AWG
- 8 AWG
- 6 AWG
Question 3: Dwelling services
A one-family house has a 200-amp, 120/240-volt, single-phase service. Using the 2017 NEC dwelling allowance and the 75°C column, what is the smallest copper service conductor allowed?
- 1/0 AWG
- 2/0 AWG
- 3/0 AWG
- 4/0 AWG
Question 4: Finding the ampacity table
In the 2017 NEC, which table gives allowable ampacities for not more than three current-carrying conductors in a raceway at a 30°C ambient?
- Table 310.16
- Table 310.15(B)(16)
- Table 310.15(B)(17)
- Table 310.104(A)
Question 5: AFCI in dwellings
Under the 2017 NEC, AFCI protection is required for 120-volt, 15- and 20-amp branch circuits supplying outlets in all of these dwelling areas EXCEPT:
- Laundry areas
- Kitchens
- Bathrooms
- Hallways
Answer key with 2017 NEC sections
Finish all five before opening the answers. Give yourself one point for each correct choice, then look up every missed section.
Show the answer to question 1Hide the answer to question 1
1. B, only the unfinished storage area (2017 NEC 210.8(A)(5))
The 2017 NEC requires GFCI protection in unfinished portions or areas of the basement not intended as habitable rooms. The finished family room is not covered by the basement rule; another location rule, such as proximity to a sink, could still require GFCI protection. One exception: a receptacle supplying only a permanently installed fire alarm or burglar alarm system.
The 2020 NEC changed this rule to cover all basements. Answer A is right in 2020 and wrong in 2017.
Show the answer to question 2Hide the answer to question 2
2. C, 8 AWG (2017 NEC 250.122(B))
Table 250.122 gives 10 AWG copper for a circuit up to 60 amps. When the circuit conductors are upsized, 250.122(B) requires the grounding conductor to grow by the same circular mil ratio.
- 6 AWG is 26,240 circular mils and 8 AWG is 16,510 (Chapter 9, Table 8).
- 10 AWG is 10,380 circular mils. 10,380 × 26,240 ÷ 16,510 = 16,497 circular mils.
- The smallest wire with at least 16,497 circular mils is 8 AWG.
Answer B forgets the upsizing rule.
Show the answer to question 3Hide the answer to question 3
3. B, 2/0 AWG copper (2017 NEC 310.15(B)(7)(1))
For a dwelling service rated 100 to 400 amps, the service conductors may have an ampacity of 83% of the service rating: 200 × 0.83 = 166 amps. In the 75°C copper column of Table 310.15(B)(16), 1/0 carries 150 amps, too little, and 2/0 carries 175.
The 2020 NEC moved this rule to 310.12. See the 2020 version of this calculation.
Show the answer to question 4Hide the answer to question 4
4. B, Table 310.15(B)(16)
The 2017 NEC labels it “Table 310.15(B)(16) (formerly Table 310.16).” Table 310.15(B)(17) covers single conductors in free air, and Table 310.104(A) covers conductor applications and insulations.
The 2020 NEC renumbered it back to Table 310.16. If your exam uses the 2017, learn the 2017 table numbers.
Show the answer to question 5Hide the answer to question 5
5. C, bathrooms (2017 NEC 210.12(A))
The 2017 list covers kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas and similar rooms or areas. Bathrooms are not on it.
How to study after this practice test
- Log the lookup. Write down the article, section or table you used and how long it took to find.
- Work the calculation again. Keep the units and intermediate steps so you can find an arithmetic error.
- Use your exam’s edition. A newer installation code is not automatically the edition used for your license test.
- Cover the full outline. Confirm your ROC classification and PSI reference list. Arizona’s NASCLA alternative has a different reference list; this set follows the state trade-test edition.
Arizona electrical practice test FAQ
Are these actual licensing exam questions?
No. These are JCR practice questions selected to help you study NEC rules. They are not supplied or endorsed by the exam vendor or licensing board.
Does getting all five right mean I am ready?
Five questions are too small a sample to judge readiness. Use a full practice exam, review the official content outline and practice every required subject.
Which NEC edition does this practice test use?
This set uses the 2017 NEC. This set uses the 2017 NEC for Arizona’s R-11 and C-11 trade-exam paths. The CR-11 dual classification uses the C-11 trade test. The separate Statutes and Rules Exam also needs preparation.
Keep practicing for your Arizona exam
Use the course links above for the exam and edition you are taking. Review the complete Arizona exam guide before you order.
Try JCR’s free NEC practice app. Check the edition shown in the app before using its questions for your exam.
More Arizona guides
Sources and answer references
- PSI Arizona contractor bulletin (February 18, 2026)
- PSI R-11 Electrical (Residential) outline
- PSI C-11/CR-11 Electrical (Commercial) outline
- PSI NASCLA electrical outline (Arizona)
- PSI CR-67 outline
- PSI A-17 outline
- Arizona ROC: Applying for a license
- Arizona ROC: License and exam fees
- Arizona ROC: Classification requirements
- A.R.S. 32-1122: Qualifications
- A.R.S. 32-1121: Who is exempt
- NFPA 70, 2017 edition: see the section citations in each answer.
- JCR 2017 nec practice test questions: source practice-bank questions.
Reviewed October 22, 2026. NEC answers and section references checked against the stated edition in NFPA LiNK. Exam information follows the linked official bulletins. Questions are selected from JCR’s shared practice bank, with clarifications where needed.