Question 1: If a 115 volts load is connected to 120 v source. what is the minimum voltage that should be supplied to load as recommended by NEC?
- 114 volts
- 120 volts
- 115 volts
- 118 volts
NEC_PRACTICE
NEC 2023
NEC Code Questions Practice Test-12
Take a Practice test on NEC Code Practice quiz questions - 12
TOPICS COVERED
NEC Practice Tests
How this test works
Read each question carefully
Look for absolute words like always / never — they often distinguish the right answer.
Manage your time
You have 14 min for 9 questions. Skip tough ones and come back.
Progress is auto-saved
Your answers are saved locally — a page refresh won't lose your work.
Review your answers
After submitting you'll see every explanation and your NEC references.
How to Use This Practice Test
This NEC Code Questions Practice Test-12 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%
Pass
Timer starts immediately. Progress is auto-saved.
0
Correct0
Wrong0s
TimeNEC Code Questions Practice Test-12 — Question List
Question 2: What is the receptacle calculated load for a 18000 square feet commercial property which contains one hundred twenty 15 A and 20 A 120 receptacles?
- 15800 VA
- 18000 VA
- 16800 VA
- 21500 VA
NEC Reference: NEC 220.14(1)
Question 3: In no case the rating of short circuit ground fault protective device for a single motor compressor should not exceed ..... percentage of the motor.
- 175 %
- 225 %
- 220 %
- 150 %
NEC Reference: NEC 440.22(A)
Question 4: The service disconnect for a mobile home should be located not less than ............. feet above platform.
- 1
- 2
- 1/2
- 3
NEC Reference: NEC 550.32(F)
Question 5: What is the minimum feeder or service load for cloth dryers in a dwelling unit?
- 5000 watts
- 2800 watts
- 4500 watts
- 6500 watts
NEC Reference: NEC 220.54
Question 6: A 4000 watts electric oven is connected to a 480 volts circuit. What is the resistance of heating element?
- 57.6 ohms
- 78.6 ohms
- 82 ohms
- 48
NEC Reference: NEC 57.6
Question 7: In a three phase balanced 4-wire system, the current in the neutral conductor ...............................
- is same as un-grounded conductors
- is higher than other conductors
- is lower than other conductors
- will not flow as the circuit is balanced
Question 8: Which of the following conductors need over current protection on a residential electric service?
- un-grounded conductor
- grounded conductor
- neutral conductor
- equipment grounding conductor
NEC Reference: NEC 240.15
Question 9: In class I Division 1 location, All fixed boxes and joints should be made ..............
- explosion proof
- water proof
- dust proof
- fire proof
NEC Reference: NEC 500.7(A)
Student Reviews
No reviews yet — be the first to share your experience!
Leave a Review