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NEC_PRACTICE NEC 2023

NEC Code Questions Practice Test-13

Take a Practice test on NEC Code Practice quiz questions - 13

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Read each question carefully

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How to Use This Practice Test

This NEC Code Questions Practice Test-13 has 10 questions with detailed answers and NEC references. Take the full test, review every wrong answer, and look up the NEC article it references before moving on.

Tip: Mixed-format test — questions jump between topics just like the real exam. Don't spend more than 90 seconds on any one question.

Topics covered: All NEC chapters — branch circuits, grounding, conductors, wiring methods, motors, and more.
Passing score: Aim for 80%+ consistently before scheduling your exam.
Questions: 10 multiple-choice, one correct answer each

10

Questions

15 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

NEC Code Questions Practice Test-13 — Question List

Question 1: Which of the following following locations , easily ignitable fibers / flyings are stored?

Class I Division I
Class III Division I
Class III Division 2
Class I Division 2

NEC Reference: NEC 500.5(D)(2)

Question 2: What is the minimum size electrical service is required for a single family dwelling unit?

100 amperes
50 amperes
150 amperes
175 amperes

NEC Reference: NEC 230.79(C)

Question 3: What must be the electrical fuse rating to protect 12 AWG Branch conductor?

20 amperes
35 amperes
25 amperes
40 amperes

NEC Reference: NEC 240.4(D)

Question 4: A sign outlet of an commercial occupancy accessible to pedestrians is a .......................... load

continuous
non continuous

Question 5: What is the minimum feeder/service conductor calculated load for an electrical sign?

15000 VA
12000 VA
18000 VA
10000 VA

NEC Reference: NEC 220.14(F)

Question 6: What is the minimum ampere rating of short circuit ground fault protective device that can be used for individual motor-compressor?

12 amperes
15 amperes
20 amperes
18 amperes

NEC Reference: NEC 440.22(A)

Question 7: An industrial heating appliances rated at 40 A is supplied by a tap conductor. what should be the minimum tap conductor ampacity?

20 amperes
10 amperes
30 amperes
25 amperes

NEC Reference: NEC 210.19(A)(4)

Question 8: If a single dwelling family unit consists of one air conditioning unit rated at 4 KW and fixed heating equipment rated at 3 KW. What is the total dwelling unit calculated load?

4 KW
7 KW
3.5 KW
3 KW

NEC Reference: NEC 220.60

Question 9: A 4000 watts electric oven is connected to 480 volts electric circuit. what is the resistance of heating element?

57.6 ohms
8.33 ohms
0.12 ohms
38.4 ohms

NEC Reference: NEC 57.6

Question 10: What is the maximum rating of panel boards containing 30 ampere or less snap switches?

30 amperes
120 amperes
45 amperes
200 amperes

NEC Reference: NEC 408.36(A)

EXAM CARD NEC_PRACTICE

Questions10

Time limit15 min

Pass score70%

Code editionNEC 2023

DifficultyIntermediate

Last reviewedJun 2026

Timer starts immediately. Progress is auto-saved.

Source: NEC 2026 (NFPA 70)