National Electrical Installation Standards

Standards as High as Your Own

Friday, December 1, 2017


Re: CQD answer published Friday, November 17 and 24, 2017 -Electric Rooms

(1) Since the question specifically referenced the NYC code, the answer was not 100% correct. NYC uses a modified version of the 2008 NEC. Among the modifications made are: To define a electric closet as " a room designed for or dedicated to the purpose of containing electrical distribution equipment such as vertical risers, bus ducts, transformers, or panel boards". In addition, section 800.133 has been modified to state " Communication wires inside of buildings shall not be installed in electric closets and shall comply with 800.133(A) through (D); new 800.133 (D) reads "Electric Closets. Communications equipment and cabling shall not be installed in Electric Closets. Similar modifications have been made in Article 770, 810, 820 and 830. Since the question indicated it was a IT closet and not a room which would need to comply with 645.4, I believe the answer is No, you may not locate a Electric closet and a IT closet in the same space in NYC.Thanks. Ken

(2)New York City has adopted the 2008 NEC however they have over 80 pages of amendments. The AHJ in NYC is the Electrical Division of the NYC Building Department. Requests for Code clarifications can be sent to

NYC Questions can also be addressed to:

Jeff Glanstein



Hey Ken and Jeff thanks for the additional information about NYC. I'm sure our readers that do work there appreciate it. Our answers are based on the NEC and this is a good reminder that local amendments or requirements can change the answer.

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 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 to view or purchase NECA safety products.

 CONTACT US: To submit a Code question, subscribe, or unsubscribe from this list, please e-mail: