Try five free Connecticut electrical practice questions with answers and 2020 NEC references. This set uses the 2020 NEC. PSI lists both the 2020 and 2023 NEC for E-1 and E-2; use one edition consistently while you practice. The E-1 contractor route also needs Business and Law. Work with your code book open, record your answers, then open the explanations below.
Start with the Connecticut exam guide for the official bulletin, approved books, exam format and registration steps.
Taking the E-2 or E-1 trade exam? JCR's Connecticut package is built on the 2020 NEC, one of the two editions PSI allows. The $495 price covers 21 hours of video in 100 lessons, a six-week plan inside JCR's 152-page workbook, a mock exam bank of 500+ questions you can take on screen or on paper, and permanent tabs for your NEC.
Which Connecticut exam are you preparing for?
| Quick facts | Connecticut electrical exams |
|---|---|
| Test company | PSI, at test centers in West Hartford and Milford or other PSI centers. Rules are in the PSI Connecticut bulletin (February 4, 2026). |
| E-2 Unlimited Journeyperson | 80 questions, 3.5 hours, 70% to pass, $59 |
| E-1 Unlimited Contractor | 100 questions, 4 hours, 70% to pass, $59 |
| Business and Law (E-1 only) | 50 questions, 2 hours, 70% to pass, $59 |
| NEC edition | 2020 or 2023 NEC, or the NEC Handbook of either edition. Open book. |
| Before you book | DCP must approve your application first. The application fee is $90 for a journeyperson and $150 for a contractor (DCP electrical license page). |
Do not write these practice questions or answers into your exam references. PSI prohibits question-and-answer material in the books.
Connecticut 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: Box fill
A metal box has four 12 AWG insulated conductors, two 12 AWG equipment grounding conductors and one receptacle on a single yoke. It has no internal clamps or fittings. What minimum box volume do these require?
- 13.5 cubic inches
- 15.75 cubic inches
- 18 cubic inches
- 20.25 cubic inches
Question 2: Services
Overhead 120/240-volt service conductors cross a residential driveway. What is the minimum clearance above final grade?
- 10 feet
- 12 feet
- 15 feet
- 18 feet
Question 3: Grounding electrodes
A dwelling service uses two ground rods because one rod alone doesn't meet the code. What is the minimum distance between the rods?
- 4 feet
- 6 feet
- 8 feet
- 10 feet
Question 4: Kitchen receptacles
Along a kitchen countertop wall in a dwelling, how far can any point on the wall line be, measured horizontally, from a receptacle outlet?
- 12 inches
- 18 inches
- 24 inches
- 48 inches
Question 5: Branch circuits
In a dwelling, the receptacle outlets in the bathrooms must be supplied by at least one branch circuit of what rating?
- 15 amps
- 20 amps
- 30 amps
- 15 or 20 amps
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. B, 15.75 cubic inches (NEC 314.16(B))
Count 4 for the insulated conductors. All the equipment grounding conductors count as 1 when there are four or fewer. The yoke counts as 2. That's 7 × 2.25 cubic inches (the 12 AWG allowance) = 15.75. Walk through more box fill examples.
Show the answer to question 2Hide the answer to question 2
2. B, 12 feet (NEC 230.24(B)(2))
Overhead service conductors need 12 feet over residential property and driveways when the voltage is 300 volts or less to ground. A 120/240-volt service is 120 volts to ground. Over public streets, alleys and parking areas with truck traffic, it's 18 feet.
Show the answer to question 3Hide the answer to question 3
3. B, 6 feet (NEC 250.53(A)(3))
When more than one rod, pipe or plate electrode is used, they must be at least 6 feet apart. A single rod needs a supplemental electrode unless it has 25 ohms or less resistance to earth (250.53(A)(2)).
Show the answer to question 4Hide the answer to question 4
4. C, 24 inches (NEC 210.52(C)(1))
No point along a countertop wall line can be more than 24 inches from a receptacle outlet, measured horizontally. That works out to receptacles no more than 4 feet apart, which is where the 48-inch choice comes from.
Show the answer to question 5Hide the answer to question 5
5. B, 20 amps (NEC 210.11(C)(3))
At least one 120-volt, 20-amp branch circuit must supply the bathroom receptacle outlets, and that circuit can have no other outlets. If it serves a single bathroom, it may also supply other equipment in that same bathroom.
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. Do not write these practice questions or answers into your exam references. PSI prohibits question-and-answer material in the books.
Connecticut 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. This set uses the 2020 NEC. PSI lists both the 2020 and 2023 NEC for E-1 and E-2; use one edition consistently while you practice. The E-1 contractor route also needs Business and Law.
Keep practicing for your Connecticut exam
Use the course links above for the exam and edition you are taking. Review the complete Connecticut 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 Connecticut guides
Sources and answer references
- PSI Connecticut Electrical Trades Candidate Information Bulletin (updated 2/4/2026)
- PSI: Connecticut occupational exams
- DCP: electrical license applications and fees
- DCP: electrical license types and scope of work
- DCP: E-2 equivalent experience and training
- DCP: E-1 equivalent experience and training
- DCP: Electrical Work Examining Board
- 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.