Standards as High as Your Own
NECA Online Help Desk Please leave a message
Re: CQD answer published Monday, September 11, 2017 -Multiwire Grounded Conductor
Comment on: CQD answer published Thursday, September 10, 2017
In all honestly, the answer to the question did it no justice. Also, it was incomplete in my estimation since it didn't cover single wire (ungrounded) circuits.
First of all, the reference has a typo, it's Art 300, not 30.
Second, there was no mention of a "multiwire branch circuit" in the question. The jumper requirement only applies to that circuit which is defined:
Branch Circuit, Multiwire. A branch circuit that consists of two or more ungrounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system.
In a single wire (ungrounded) circuit, it's permissible to use the receptacle (device) to maintain grounded conductor continuity. From what I read of the question, that's what the submitter was trying to get an answer on.
Regards, Nick Abbatiello
Hey Nick thanks for your comment. You are correct the answer could have been better. Section "30.13(B)" was meant to be "300.13(B)" and I hope the "0" doesn't get poorly misplaced in my paycheck.
Although the question didn't mention a multiwire branch circuit the answer did, meaning that if it is not a multiwire branch circuit (2 wire) then device connections can be used for providing the continuity of grounded conductors as you mentioned.
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: firstname.lastname@example.org.
© 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.