Question 1: If the conduit is placed in hazardous locations , it must be made .................... to prevent sparking when fault current flow through it.
- wrentch tight
- sealed
- bonded
- rugged plastic
NEC Reference: NEC 500.8(E)
NEC_PRACTICE
NEC 2023
NEC Code Questions Practice Test-14
Take a Practice test on NEC Code Practice quiz questions - 14
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This NEC Code Questions Practice Test-14 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-14 — Question List
Question 2: What are the maximum allowable service dis connectors consist for each service?
- 4
- 2
- 6
- 8
NEC Reference: NEC 230.71(A)
Question 3: What is the smallest rating plug fuse that is used for residential 120 volts branch circuit?
- 15 amperes
- 20 amperes
- 12 amperes
- 18 amperes
NEC Reference: NEC 240.6(A)
Question 4: What is the voltage drop of two 10 AWG THWN conductors that supply 16 amperes 115 volts load located 50 feet from the source?
- 1.92 volts
- 0.96 volts
- 2.4 volts
- 1.8 volts
Question 5: What is the minimum volt ampere rating of a 110,000 square foot school?
- 330 KVA
- 220 KVA
- 165 KVA
- 440 KVA
NEC Reference: NEC 220.12
Question 6: A disconnecting means should be visibly located from a motor not more than .............. distance.
- 50 feet
- 40 feet
- 55 feet
- 60 feet
Question 7: A 4800 watts electric motor is connected to 240 volts single phase supply, 2 wire circuit. what is the minimum size THW conductor that is required to supply the load?
- 14 AWG
- 12 AWG
- 10 AWG
- 8 AWG
NEC Reference: NEC 424.3(B)
Question 8: What is the minimum allowable 3 wire service entrance conductor rating for a single family dwelling unit?
- 100 amperes
- 125 amperes
- 150 amperes
- 75 amperes
NEC Reference: NEC 230.42(B)
Question 9: An electric heater with a resistance of 18 ohms draws a current of 7 amperes. what is the minimum wattage of electric heater?
- 882 watts.
- 764 watts
- 126 watts
- 922 watts
Question 10: what is the maximum over current device rating that is allowed to placed to protect panel board instrumentation circuit?
- 30 amperes
- 15 amperes
- 20 amperes
- 10 amperes
NEC Reference: NEC 408.52
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