Question 1: What is the minimum working space that should be provided for switch boards and panel boards?
- 6 1/2 feet
- 8 1/2 feet
- 4 1/2 feet
- 2 1/2 feet
NEC Reference: NEC 110.26(A)(3)
NEC_PRACTICE
NEC 2023
NEC Code Questions Practice Test-17
Take a Practice test on NEC Code Practice quiz questions - 17
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How to Use This Practice Test
This NEC Code Questions Practice Test-17 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
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TimeNEC Code Questions Practice Test-17 — Question List
Question 2: Which of the following equation is suitable to find the voltage drop in the circuit?
- VD = IR
- VD = I / R
- VD = P / I
- VD = I <sup>2</sup> R
Question 3: What is the wattage of the 120 volts single phase motor with a resistance of 20 ohms?
- 720 Watts
- 520 Watts
- 2400 watts
- 6 watts
Question 4: Over current devices must not be located on ..............
- Over the steps of stairway
- Above the panel board
- Bath Rooms
- Wet areas
Question 5: The primary current rating of a motor generator arc welder is 30 A with a duty cycle of 30 %? what is the minimum size branch circuit conductor for welder?
- 12 AWG
- 10 AWG
- 14 AWG
- 8 AWG
Question 6: The maximum over current protection used for resistance type heating elements in electric space-heating equipment?
- 60 amperes
- 40 amperes
- 70 amperes
- 20 amperes
NEC Reference: NEC 424.22(B)
Question 7: For a single family dwelling unit , what is the minimum allowable rating of a 3 wire service entrance conductors?
- 100 amperes
- 150 amperes
- 200 amperes
- 180 amperes
NEC Reference: NEC 230.42(B)
Question 8: An electric heater with a resistance of 18 ohms which draws a current of 7 amps. what is the minimum wattage of electric heater?
- 882 watts.
- 126 watts
- 723 watts
- 184 watts
Question 9: What is the maximum branch circuit load for a 10 kW single electric range in a dwelling unit?
- 8 kW
- 10 KW
- 7 KW
- 6 KW
NEC Reference: NEC 220.555
Question 10: Which of the following must be provided near electronic equipment which are exposed to physical damage?
- warning signs
- working space
- enclosures or gaurds
- sufficient head room
NEC Reference: NEC 110.27(B)
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