Down to the (NEC) Wire
Test your National Electrical Code (NEC) knowledge with the following quiz.
All Answers relate to NFPA 70, 2017 Edition
1. A raceway consisting of a metal enclosure containing factory-mounted bare or insulated conductors, which are usually copper or aluminum bars, rods, or tubes is defined as:
A. a raceway
B. a gutter
C. a busway
D. a cablebus
Feedback: 268.2
2. Nonmetallic auxiliary gutters shall not be used to extend a greater distance than ______ meters beyond the equipment it supplements.
A. 2
B. 6
C. 9
D. 15
Feedback: 366.12(2)
3. Circuit integrity cables shall be permitted to be installed only in a raceway specifically ______ and marked as part of an electrical circuit protective system.
A. approved
B. listed
C. identified
D. any of the above
4. Surface metal raceway and associated fittings shall be:
A. approved
B. listed
C. identified
D. marked
Feedback: 386.2
5. Surface metal raceways shall not be permitted to be used under raised floors.
A. True
B. False
6. Look at the ‘What’s Wrong With This?’ photo below. Is the installation in accordance with the NEC?
A. Yes
B. No
Feedback: 400.12(2)
7. Surface metal raceways shall not be used where the voltage is ______ volts or more between conductors, unless the metal has a thickness of not less than that 0.04 inches.
A. 24
B. 48
C. 150
D. 300
8. Surface nonmetallic raceways shall be supported ______.
A. every 6 inches
B. every 3 feet
C. per the manufacturer’s instructions
D. at least one support every standard length
Feedback: 388.30
9. The maximum number of conductors in nonmetallic wireways shall not exceed ______ percent of the interior cross-sectional area of the nonmetallic wireway.
A. 10
B. 20
C. 30
D. 40
10. Dead ends of nonmetallic wireway shall be:
A. closed
B. open
C. terminated
D. sealed
Feedback: 378.58
11. Sheet metal auxiliary gutters are permitted to be installed in wet locations.
A. True
B. False
Feedback: 366.10(A)(2)
12. Busways shall be permitted to be installed in hoistways.
A. True
B. False
13. ENT shall be clearly and durably marked at least every ______ meters.
A. 3
B. 9
C. 10
D. 30
Feedback: 362.120
14. FMT shall be permitted to be used for branch circuits in which of the following? Select all that apply.
A. dry locations
B. where concealed
C. accessible locations
D. storage battery rooms
Feedback: 360.12
15. A cablebus is permitted to be used in a hoistway.
A. True
B. False
Feedback: 370.12
Post-Quiz Extra: Can you identify?
What is wrong with this installation? Can you identify what code section applies?
Click here to see the answer.
Flexible cables are not permitted to be run through holes in walls, structural ceilings, suspended ceilings, dropped ceilings, or floors. NEC code reference 400.12(2)
Looking for quick answers on security topics? Try Ask SDM, our new smart AI search tool. Ask SDM →
Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!
