Question 1: What is the maximum 3 phase load that can be connected on a 220 ft 8 THWN , 480 volts conductor without exceeding the NEC recommended voltage drop?
- 40 KVA
- 45 KVA
- 48 KVA
- 44 KVA
NEC Reference: NEC 14.4
NEC_PRACTICE
NEC 2023
NEC Code Questions Practice Test-19
Take a Practice test on NEC Code Practice quiz questions - 19
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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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You have 14 min for 9 questions. Skip tough ones and come back.
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How to Use This Practice Test
This NEC Code Questions Practice Test-19 has 9 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: 9 multiple-choice, one correct answer each
9
Questions
14 min
Time
70%
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TimeNEC Code Questions Practice Test-19 — Question List
Question 2: What is the minimum general lighting load required for a 1500 square feet ware house as permitted by NEC?
- 375 VA
- 1500 VA
- 585 VA
- 1245 VA
Question 3: A 240 volts single phase room air-conditioner rating not more than ............. can be consider as a single motor unit?
- 30 amperes
- 40 amperes
- 50 amperes
- 60 amperes
NEC Reference: NEC 440.62(A)(2)
Question 4: If a replacement motor compressor draws 48 amperes , what s the minimum rating of disconnect means?
- 46 amperes
- 40 amperes
- 50 amperes
- 44 amperes
NEC Reference: NEC 440.12(A)(1)
Question 5: The single phase switches can be used to control the motors when they are rated at ......... horse power or less.
- 1/2
- 1/4
- 3/4
- 1
Question 6: What should be the maximum percentage cross sectional area of a conduit that should be occupied when three or more THW conductors are placed in a conduit?
- 40 %
- 25 %
- 30 %
- 45 %
Question 7: What is the resistance offered by electric heater rated 1800 watts at 120 volts?
- 8 ohms
- 15 ohms
- 6 ohms
- 12 ohms
Question 8: Intrinsically safe conductors are identified by ..............
- red
- black
- blue
- brown
NEC Reference: NEC 504.80(C)
Question 9: Which of the following is the smallest conductor permitted for pool equipment is :
- 8 AWG
- 12 AWG
- 10 AWG
- 6 AWG
NEC Reference: NEC 680.26(B)
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