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Thursday, November 10, 2022

Question:

Good morning “Code Guru”, Do all electrical installations need to be Approved/Listed? All the Best, James Vollrath
A

Answer:

Hello James, thanks for the question. Yes, and maybe. Section 110.2 states: conductors and equipment required or permitted by the NEC® shall only be acceptable if “Approved”. Section 110.3 provides guidance to an AHJ on what methods can be utilized to comply with the approval required in Section 110.2. AHJ’s can use one or more of the following methods for determining approval:

  • Examination (Section 110.3(A)(1)-(8))
  • Installation and Use (Section 110.3(B))
  • Listing (Section 110.3(C))

     

Listing of equipment would also be required, where specifically mandated in the Code. For example: Section 242.8 requires SPDs to be listed devices.

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CHARLIE TROUT: Charles M. Trout, better known as Charlie, was a nationally known NEC® expert and author. He served on several NEC® technical committees and is past chairman of CMP-12. In 2006 Charlie was awarded the prestigious Coggeshall Award for outstanding contributions to the electrical contracting industry, codes and standards development, and technical training. Even though Charlie passed away in October of 2015, his work continues in spirit. NECA continues to maintain this question forum for its many subscribers in memory and recognition of all his significant contributions to making the NEC what it is today.

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IMPORTANT NOTICE: Unless the question requests a response based on a specific edition, all answers are based on the latest edition of NFPA 70® National Electrical Code®.

This correspondence is not a formal interpretation of the NEC® and any responses expressed to the questions are opinions and do not necessarily represent the official position of NECA, NFPA, the NEC Correlating Committee any Code-making panel or other electrical technical committee. In addition, this correspondence is neither intended, nor should it be relied upon, to provide professional consultation or services. 

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