National Electrical Installation Standards

Standards as High as Your Own

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,” Sponsored by Eaton.


  • ?
    Thursday, March 21, 2019

    Question:

    Under sec 400.10 (A) (11) is it permissible to power a wall mountable receptacle with flexible?

    Michael Gaudette

  • ?
    Wednesday, March 20, 2019

    Question:

    I watched 2 guys working on a pump that was powered from an MCC two flights down. The first three times they went down and put on locks before working on the pump, after that it was "Don't hit the start button". Should there have been a local disconnect at the pump for lock out?

    Michael Casey

    A

    Answer:

    Hey Michael thanks for your question. Maybe, depending on when the pump motor was installed and where it is located. Why didn't you stop them from doing a dangerous task? What about the site-specific lockout procedures? The rules for locating motor disconnecting means changed in the 2002 NEC after many comments and lots of discussion. Even today, in industrial installations with written safety procedures that allow only qualified persons to service the equipment, a disconnecting means is not required in sight of the motor - if the controller disconnecting means is lockable as stated in 430.102(B) Exception(b). But having one there makes it easier for the worker to lock out the equipment.

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.