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NEC_PRACTICE NEC 2023

NEC Code Questions Practice Test-6

Free NEC code Questions Practice Test-6

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NEC Practice Tests

How this test works

Read each question carefully

Look for absolute words like always / never — they often distinguish the right answer.

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How to Use This Practice Test

This NEC Code Questions Practice Test-6 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-6 — Question List

Question 1: What is the minimum size of aluminium conductor used for surge protective devices?

12 AWG
14 AWG
10 AWG
8 AWG

Question 2: Which of the following is the standard fuse rating of an electrical fuse as per NEC?

45
50
55
60

Question 3: Without applying any de-rating factor for conductor current carrying capacity, how many conductors can run parallel in raceway or cable?

4
3
5
6

NEC Reference: NEC 310.15(B)(3)(a)

Question 4: A 120 volts panel has a rating of 50A. What is its maximum over current device rating?

50 A
62.5 A
57.5 A
75 A

Question 5: Which of the following is maximum operating voltage of a low voltage lighting system?

30 volts
25 volts
40 volts
35 volts

NEC Reference: NEC 411.2

Question 6: The standby power shall be available not more than ……………..

30 seconds
75 seconds
1 minute
2 minute

NEC Reference: NEC 701.11

Question 7: In class I division 2 location, unless it is specified the cross sectional area of the conductors permitted in a seal shall not exceed …………. percentage of a cross sectional area of RMC

25
30
40
50

NEC Reference: NEC 501.15(C)(6)

Question 8: Branch circuits for heating and air conditioning equipment located in the elevators shall not exceed which of the following voltage?

600 volts
480 volts
240 volts
900 volts

NEC Reference: NEC 620.3(C)

Question 9: What is the minimum volume allowance required per a No 14 AWG conductor?

1.50 in<sup>3</sup>
1.75 in<sup>3</sup>
2.0 in<sup>3</sup>
2.5 in<sup>3</sup>

NEC Reference: NEC 314.16(B)

Question 10: Mutli-wire branch circuits shall not be permitted in class I division I locations.

True
False

NEC Reference: NEC 501.40

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)