Try five free Delaware electrical practice questions with answers and 2020 NEC references. Use this 2020 NEC set for Delaware Master, Limited and Residential preparation. Delaware Journeyperson uses the 2023 NEC, so this set and JCR’s 2020 course do not match that exam edition. Work with your code book open, record your answers, then open the explanations below.
Start with the Delaware exam guide for the official bulletin, approved books, exam format and registration steps.
Taking the Master, Limited or Residential exam? JCR's Delaware package follows the 2020 NEC that Prov grades those three exams on. For $495 you get 100 video lessons (21 hours), the 152-page JCR workbook with a six-week plan, a 500+ question mock exam (digital and printed) and permanent code tabs.
Which Delaware exam are you preparing for?
| Quick facts | Delaware electrician exams |
|---|---|
| Test company | Prov, at test centers in Dover and Wilmington or online from home. Rules come from the Prov bulletin (DE CIB 2026.10.21). |
| Master Electrician | 80 questions, 180 minutes, 75% to pass, $100, 2020 NEC |
| Limited Electrician | 70 questions, 180 minutes, 75% to pass, $100, 2020 NEC |
| Residential Electrician | 60 questions, 180 minutes, 75% to pass, $100, 2020 NEC |
| Journeyperson Electrician | 70 questions, 180 minutes, 75% to pass, $100, 2023 NEC |
| Before you book | Approval from the Board of Electrical Examiners. You apply in DELPROS, Delaware's online licensing portal. |
Keep the Master, Limited, Residential and Journeyperson reference lists separate. Study the other books in your Prov outline too.
Delaware 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: 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 2: 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 3: Conduit fill
Five individual conductors are installed in a complete conduit run longer than 24 inches. No special fill allowance applies. What is the most of the conduit's cross-section they may fill?
- 31 percent
- 40 percent
- 53 percent
- 60 percent
Question 4: 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 5: Air-conditioning equipment
A hermetic motor-compressor has a branch-circuit selection current of 23 amps. Its short-circuit and ground-fault protective device will carry the starting current. What is the largest device rating allowed?
- 30 amps
- 35 amps
- 40 amps
- 45 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. 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 2Hide the answer to question 2
2. 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 3Hide the answer to question 3
3. B, 40 percent (NEC Chapter 9, Table 1)
Over 2 conductors may fill 40% of the conduit. One conductor may fill 53%, and two may fill 31%. See a full conduit fill example.
Show the answer to question 4Hide the answer to question 4
4. 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 5Hide the answer to question 5
5. C, 40 amps (NEC 440.22(A))
The first limit is 175% of the branch-circuit selection current: 23 × 1.75 = 40.25 amps. The device can't exceed that, so 40 amps is the largest rating. The rule allows up to 225% only when the device won't carry the motor's starting current, and this one does.
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. Keep the Master, Limited, Residential and Journeyperson reference lists separate. Study the other books in your Prov outline too.
Delaware 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. Use this 2020 NEC set for Delaware Master, Limited and Residential preparation. Delaware Journeyperson uses the 2023 NEC, so this set and JCR’s 2020 course do not match that exam edition.
Keep practicing for your Delaware exam
Use the course links above for the exam and edition you are taking. Review the complete Delaware 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 Delaware guides
Sources and answer references
- Prov Delaware Candidate Information Bulletin (DE CIB 2026.10.21)
- Prov: Delaware exam information
- Delaware Board of Electrical Examiners
- DE Board: exam information
- DE Board: Master and Limited licenses
- DE Board: Journeyperson
- DE Board: Residential
- 24 Del. C. §§ 1408–1409
- Delaware 2026 fire regulations update (2023 NEC)
- Examroom.ai system check
- NFPA 70, 2020 edition: see the section citations in each answer.
- JCR maryland electrical practice test: source practice-bank questions.
- JCR washington 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.