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The National Electrical Code is the bedrock of the electrical construction business.

Do you know all the ins and outs of the Code? NECA and Electrical Contractor magazine are pleased to present their daily online feature, “Code Question of the Day.”


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  • ?
    Friday, September 22, 2017

    Question:

    Is a GFIC required in a garage when no water is present?

    Larry Jordan

  • ?
    Thursday, September 21, 2017

    Question:

    Extending an existing circuit with reduced equipment ground

    Hello Charlie, (and now your crew)

    Thank you for what you do! I am older than dirt and grew up (sort of) on a farm without the benefit of electricity. Makes you wonder how I became an electrical inspector – right?

    Question that I have not been asked before:  Can a 12/2G (with a 14 AWG equipment ground) be extended on a 20 amp circuit?

    Thank you, Ray Paulson

    A

    Answer:

    Hey Ray thanks for your question and the kind words. Many of us can probably be considered old but dirt has been around much longer. Several methods of providing equipment grounding connections are described in 250.130(C) as you know. No mention is made of requiring the existing portion of a circuit to be changed to meet the rules in 250.122 so it seems this is a judgment decision to be made by the AHJ. Depending on the specific installation 250.4(A)(5) could also be a consideration.

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.

NECA STANDARDS: NECA publishes the National Electrical Installation Standards™ (NEIS™), a series of ANSI-approved performance and quality standards for electrical construction. Visit NECA-NEIS.org for more information. NEISÔ can be purchased in three formats: as paper books, on CD, or as electronic downloads.

NECA SAFETY PRODUCTS: NECA publishes valuable electrical safety books and CDs for the industry. Visit necanet.org/store to view or purchase NECA safety products.

CONTACT US: To submit a Code question, subscribe, or unsubscribe from this list, please e-mail: codequestion@necanet.org.

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