Standards as High as Your Own
NECA Online Help Desk Please leave a message
Re: CQD answer published Tuesday, November 21, 2017 -
Here is the answer to today's question: Excluding any specific local requirements which may have been lawfully enacted, the Colorado State Electrical Board follows the requirements of the 2017 National Electrical Code without exception. Whether dealing with a service conductor or feeder, the rules found in 230.70 and 225.32 are quite similar. The disconnect must be located either 1) outside or 2) inside nearest the point of entrance of the conductors. There are some widely-scattered local requirements, imposed either by local fire authorities, building departments, or power companies, where an exterior disconnect may be necessary. As always, if in doubt, check with your local AHJ.
J Grant Hammett
Hey J Grant thanks for your comment and checking with the AHJ before doing an installation is always better. The wording in 225.32 and 230.70 is similar but there is a significant difference. A branch circuit or feeder disconnecting means has to be nearest the point of conductor entrance whether the disconnecting means is inside or outside as stated in the second sentence of 225.32. Service disconnecting means only need to be nearest the point of conductor entrance if inside as stated in 230.70(A)(1).
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. NEISÃ” 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: email@example.com.
© 1999 – 2014 National Electrical Installation Standards. All rights reserved.
Brought to you by NECA. NECA is the voice of the electrical contracting industry NATIONAL ELECTRICAL INSTALLATION STANDARDS, NEIS and the NEIS logo are registered trademarks of the National Electrical Contractors Association.
Created by Matrix Group International, Inc.