Try five free Alaska electrical practice questions with answers and 2020 NEC references. These questions practice the NEC portion of the Unlimited Commercial Wiring and Residential Wiring administrator exams. Alaska also tests its statutes and regulations. An administrator license and a journeyman certificate are different credentials; use the license guide below to choose your route. Work with your code book open, record your answers, then open the explanations below.
Start with the Alaska exam guide for the official bulletin, approved books, exam format and registration steps.
Testing for UCW or RW? JCR's Alaska package is built on the 2020 NEC that PSI grades Alaska administrator code questions on.
What you get for $495: 100 video lessons (21 hours), JCR's 152-page workbook with a six-week plan, a 500+ question mock exam (digital and printed) and permanent code tabs, which PSI's Alaska rules allow.
Which Alaska exam are you preparing for?
| Quick facts | Alaska electrical exams |
|---|---|
| Administrator exams | PSI, online with a remote proctor or at a test site. Rules are in the Electrical Administrators bulletin (updated October 15, 2026). |
| Unlimited Commercial Wiring (UCW) | 100 questions, 240 minutes, 70% to pass, $150 |
| Residential Wiring (RW) | 75 questions, 180 minutes, 70% to pass, $150 |
| Code edition | 2020 NEC. Code questions are graded on that edition only. |
| Books | Open book. You bring your own. Permanent tabs allowed, Post-its not. |
| Before you book | CBPL approves your administrator application ($150 application fee plus $170 license fee) and sends an eligibility letter good for 1 year. |
| Journeyman COF exam | Given by Mechanical Inspection, not PSI. Open book on the 2020 NEC, 4 hours maximum, 70% to pass. |
Practice the Alaska law references separately. The Unlimited Linework categories also need references beyond the NEC.
Alaska 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: Working space
A 480Y/277-volt switchboard has exposed live parts on both sides of the aisle in front of it. What is the minimum depth of working space?
- 3 feet
- 3½ feet
- 4 feet
- 5 feet
Question 2: Motors
A 10 hp, 230-volt, single-phase motor runs in continuous duty. What is the minimum ampacity for its branch-circuit conductors?
- 50 amps
- 57.5 amps
- 62.5 amps
- 68.75 amps
Question 3: Grounding
A branch circuit is protected by a 60-amp breaker. What is the smallest copper equipment grounding conductor allowed for it?
- 12 AWG
- 10 AWG
- 8 AWG
- 6 AWG
Question 4: Wiring methods
Type NM cable runs exposed along the face of a joist. It is secured within 12 inches of each box. What is the most distance allowed between supports along the rest of the run?
- 3 feet
- 4½ feet
- 6 feet
- 10 feet
Question 5: GFCI protection
In a dwelling, which general-purpose 125-volt, 15- and 20-amp receptacles need GFCI protection? Assume no exception applies. (1) Receptacles in a laundry area. (2) Receptacles in a finished basement.
- One only
- Two only
- Both one and two
- Neither one nor two
Answer key with 2020 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. C, 4 feet (NEC Table 110.26(A)(1))
The switchboard is 277 volts to ground, which falls in the 151–600 volt row. Exposed live parts on both sides is Condition 3, so the minimum depth is 4 feet. Condition 2 (grounded parts across the aisle) would be 3½ feet. See all three conditions explained.
Show the answer to question 2Hide the answer to question 2
2. C, 62.5 amps (NEC Table 430.248 and 430.22)
Use the table current, not the nameplate. Table 430.248 lists 50 amps for a 10 hp, 230-volt single-phase motor. Section 430.22 requires 125% of that: 50 × 1.25 = 62.5 amps. The 57.5-amp choice is the table value for a 200-volt motor.
Show the answer to question 3Hide the answer to question 3
3. B, 10 AWG (NEC Table 250.122)
Table 250.122 sizes the equipment grounding conductor by the overcurrent device ahead of it. For a 60-amp device, the minimum is 10 AWG copper or 8 AWG aluminum. See more Table 250.122 examples.
Show the answer to question 4Hide the answer to question 4
4. B, 4½ feet (NEC 334.30)
NM cable must be secured at intervals of no more than 4½ feet and within 12 inches of every box, cabinet or fitting it enters. The 2020 NEC also caps the cable between the box entry and the first support at 18 inches.
Show the answer to question 5Hide the answer to question 5
5. C, both one and two (NEC 210.8(A)(5) and (10))
The 2020 NEC requires GFCI protection for these general-purpose receptacles in laundry areas and in basements, finished or not. The question excludes special exceptions. Older editions limited the basement rule to unfinished basements, which is why many people pick "one only." See every dwelling GFCI location.
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. Practice the Alaska law references separately. The Unlimited Linework categories also need references beyond the NEC.
Alaska 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 2020 NEC. These questions practice the NEC portion of the Unlimited Commercial Wiring and Residential Wiring administrator exams. Alaska also tests its statutes and regulations. An administrator license and a journeyman certificate are different credentials; use the license guide below to choose your route.
Keep practicing for your Alaska exam
Use the course links above for the exam and edition you are taking. Review the complete Alaska 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 Alaska guides
Sources and answer references
- PSI Alaska Electrical Administrators bulletin (updated October 15, 2026)
- PSI: Alaska electrical administrators
- CBPL: Electrical Administrators
- CBPL: exam information
- CBPL License by Examination application 08-4898
- AS 08.40 and 12 AAC 32
- Mechanical Inspection: testing information
- Mechanical Inspection: licenses and requirements
- Certificate of Fitness statutes and regulations (August 2025)
- Electrical and Plumbing COF application
- NFPA 70, 2020 edition: see the section citations in each answer.
- JCR washington electrical practice test: source practice-bank questions.
- JCR maryland electrical practice test: source practice-bank questions.
- JCR new mexico electrical practice test: 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.