Question 1: Flexible cord or cable cannot be used in place of permanent wiring.
- True
- False
NEC CODE
NEC 2023
Flexible Cords and Fixture Wires (NEC 400)
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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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TimeFlexible Cords and Fixture Wires (NEC 400) — Question List
Question 2: When eight 16A current carrying conductors are grouped in to a flexible cord. What is the allowable ampacity of each conductor?
- 11.2 amperes
- 16 amperes
- 12.8 amperes
- 14.4
NEC Reference: NEC 400.5(A)(3)
Question 3: Which of the following places the flexible cords cannot be used?
- Wiring of cranes and hoists
- Connection of moving parts
- Elevator cables
- Attached to building surfaces
Question 4: The over current devices for flexible cords or cables must not be rated …………………………..
- Higher than the cord’s ampacity
- Lower than the cord’s ampacity
- 125% lower than cord’s ampacity
- 125% higher than cords ampacity
Question 5: Which of the following is the minimum size of fixture size that can use for wiring control circuits?
- 18 AWG
- 16 AWG
- 10 AWG
- 12 AWG
NEC Reference: NEC 402.6
Question 6: What is the allowable ampacity of a 10 AWG Fixture wire?
- 28
- 23
- 17
- 32
NEC Reference: NEC 402.5
Question 7: Unless it is permitted the conductors cannot be used for the following wiring?
- Branch circuit wiring
- Elevators and escalator control circuits
- To connect luminaries
- Fire alarm circuits
Question 8: When 5 current carrying conductors are equipped in the flexible cord, which percentage of rated ampacity is allowed for each conductor?
- 80
- 60
- 70
- 90
NEC Reference: NEC 400.5(A)(3)
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