Conductors and equipment covered by the NEC are acceptable only if the authority having jurisdiction (AHJ) approves them. Certified (listed) electrical products and equipment often serve as the AHJ’s basis for approval. A product must be listed where the NEC includes a requirement that equipment be listed. Are you familiar with other installation factors that the AHJ will verify in the approval process?
Created by: Michael Johnston
1. Based on NEC requirements, which of the following entities is responsible for approval of electrical equipment and installations?
A. The owner
B. The engineer
C. The AHJ
D. The contractor
2. Which of the following is not responsible for interpreting the rules of the NEC as it relates to applying the Code to installations and systems?
A. The AHJ
B. The contractor
C. The engineer
D. B and C
3. The phrase “acceptable to the authority having jurisdiction” best defines which of the following?
4. The NEC requires all conductors and equipment to be certified (listed).
5. Which organization publishes a list of nationally recognized testing laboratories?
6. If special permission is granted by the AHJ, it must be in writing.
7. All electrical metallic tubing covered by the NEC is not required to be listed.
8. The NEC’s mandatory requirements are characterized by using which of the following phrases?
A. Shall not
B. Shall be permitted
C. Shall not be required
D. May be permitted
9. Listed or labeled electrical equipment is required to be installed and used in accordance with any installation instructions included in the listing.
10. In judging equipment, consideration shall be given to which of the following?
A. Suitability for installation and use
B. Mechanical strength and durability
C. Wire bending space
D. Arcing effects
E. Any of the above