Question 1: What is the maximum voltage drop that is recommended by NEC for branch conductor and feeder conductor?
- 3 %
- 5 %
- 8 %
- 4 %
NEC CODE
NEC 2023
NEC Code Questions Practice Test-20
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The National Electrical Code (NFPA 70) is the benchmark standard for safe electrical installation in the US. It is updated every 3 years by the NFPA.
Study the edition adopted by your state. As of 2025, most states use the 2020 or 2023 NEC. These tests are written to the 2023 edition.
The most tested articles are 100 (Definitions), 200–250 (Wiring & Grounding), 300–314 (Wiring Methods), 400–411 (Conductors), 430 (Motors), and 700–701 (Emergency Systems).
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TimeNEC Code Questions Practice Test-20 — Question List
Question 2: What is the minimum load that is required for exterior sign or outline lightening for a commercial occupancy as per NEC?
- 12000 VA
- 18000 VA
- 15000 VA
- 21000 VA
NEC Reference: NEC 220.14(F)
Question 3: A cord and plug device used as disconnecting means for a motor must be rated for ..................
- Horsepower
- voltage
- Resistance
- Current
NEC Reference: NEC 430.109(F)
Question 4: A 2400 volts motor disconnecting means must be capable of being locked in the .....................
- closed position
- Open position
- ON position
- Both open and close position
NEC Reference: NEC 430.227
Question 5: If the branch circuit rating more than ................., the lamp holders connected to it should be of the heavy duty type.
- 20 amperes
- 25 amperes
- 40 amperes
- 45 amperes
NEC Reference: NEC 210.21(A)
Question 6: All 15 or 20 amperes receptacle outlets installed in bathrooms of dwelling units must always require .............................
- Non ground recetacles
- water proof receptacles
- protective gaurds
- Ground fault circuit interceptor ( GFCI)
NEC Reference: NEC 210.8(A)(1)
Question 7: How much power consumed by 240 volts circuit that draws 30 amperes current?
- 7.2 KW
- 5.2 KW
- 8.5 KW
- 9.3 KW
Question 8: For conductors supplying portable signs in a dry location what is the maximum length in feet allowed?
- 16
- 12
- 15
- 8
NEC Reference: NEC 600.10(D)(2)
Question 9: For a commercial kitchen with two electrical equipment, what demand factor is allowed?
- 100 %
- 80 %
- 70 %
- 90 %
NEC Reference: NEC 220.56
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