National Electrical Installation Standards

Standards as High as Your Own

The Code Question of the Day (CQD) is NECA and ELECTRICAL CONTRACTOR Magazine’s flagship National Electrical Code (NEC®) public forum for the industry, sponsored by EATON.

The daily distribution of Q&A generates a lively dialogue and shares relative Code-based practical responses.

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    Thursday, April 2, 2020

    Question:

    Hi Code People, Can 12-2 NM cable be installed in a length of 3/4 EMT from outlet to outlet?  Thanks for your opinion.

    Thomas Simpson

  • ?
    Wednesday, April 1, 2020

    Question:

    Thank you for taking my question. I follow this daily and have for many years. I also am an a electrician and electrical instructor. My question is if I were to rewire an existing apartment on the 19th floor in a type one construction. The floors and above the ceilings are concrete and all metal studs. The existing wiring method is type NMC. Building is 60 yrs old. Every floor has 4 apartments. Customer wants new lighting and receptacle outlets added. I believe NMC is allowed per NEC because of the type of construction. Please give me your thoughts. I know the AHJ has final say.

    Randy Adams

    A

    Answer:

    Hi Randy, thanks for the question. Based on the information provided, we will provide a response. Your last sentence in this inquiry is an important one, which acknowledges the AHJ in the decision process, especially with existing and remodeling installations. At face value, without know all of the parameters, the NMC would be acceptable is it meets the requirements in Section 334.10(B)(3) of the Code.  On an older installation like this it is best to meet with the AHJ and get their input on hoe they will apply the NEC in this specific installation. 

ABOUT CQD: The Code Question of the Day (CQD) is NECA and ELECTRICAL CONTRACTOR Magazine’s flagship National Electrical Code (NEC®) public forum for the industry, sponsored by EATON. The daily distribution of Q&A generates a lively dialogue and shares relative Code-based practical responses.

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CHARLIE TROUT: Charles M. Trout, better known as Charlie, was a nationally recognized NEC® expert and author. He served on several NEC technical committees and is past chairman of CMP-12. In 2006, Charlie was awarded NECA’s prestigious Coggeshall Award for outstanding contributions to the electrical contracting industry, codes and standards development and technical training. NECA continues to provide this public forum in memory and recognition of all his fine contributions that has made the NEC what it is today. 

NECA STANDARDS: NECA publishes the National Electrical Installation Standards™ (NEIS™), a series of ANSI-approved performance and quality standards for electrical construction. NEIS can be purchased in the NECA Store in three formats: a printed or PDF download of a standard or, as an annual subscription service.

NECA SAFETY PRODUCTS & PUBLICATIONS: NECA produces electrical safety publications and products for the industry including jobsite safety guides, handbooks and resource kits. View a full listing of available resources and products »

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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