National Electrical Installation Standards

Standards as High as Your Own

Monday, December 2, 2019


Re: CQD answer published Monday, November 11, 2019 -Service Conductors in Building

I know, I am mostly retired but still love the Code Question of the Day and still miss Charlie at the Western Section IAEI meetings. We have has some of the best conversations about the Code (what else?) and I loved to win an argument (that didn’t happen often).

RE: the Code Question of the Day for Friday, November 8, 2019 It is interesting to me that Mr. Tucker referenced an electric utility actually entering a building. Most electric utilities DO NOT permit their conductors to enter a building since we normally do not use conductors that are tested by a NRTL and they have not passed the vertical flame test. Most of the secondary conductors we use are polyethylene covered for overhead and cross-linked polyethylene for direct burial. For entry into a building, the cross-linked polyethylene URD (normally USE) cable has to be marked USE/XHHW or similar to meet the Code requirements.

Take care, Charlie Eldridge




Hey Charlie thanks for your follow up comment, the complement and the additional information about why the conductors entering a building are customer owned.

ABOUT CQD: NECA’s Code Question of the Day (CQD) is a leading National Electrical Code® forum for NECA and the industry. The CQD generates a lively dialogue and relative practical and Code-based responses to an ever-increasing and interactive audience.

IMPORTANT NOTICE: All answers are based on the latest edition of the National Electrical Code®, unless the question requests a response based on a specific edition. This correspondence is not a formal interpretation of the NEC®. Any responses expressed to the questions are opinions and do not necessarily represent the official position of NECA, NFPA, or any technical committee. In addition, this correspondence is neither intended, nor should it be relied upon, to provide professional consultation or services.

ABOUT CHARLIE: 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. Charlie was also a member of NECA’s Academy of Electrical Contracting. Charlie’s experienced team of industry experts keep the CQD dialogue and discussions active and informative in the spirit of the man himself, as he wanted.

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