Standards as High as Your Own
NECA Online Help Desk Please leave a message
This question is about a single-family dwelling that has a 200-amp new panel with a 100 amp sub panel, the subpanel feeds all the branch circuits, and some of the branch circuits have an old two wire Romex 2 hots 1 bare ground for the oven and dryer and one hot one neutral for the other branch circuits, the city wants all the 220 volt Branch circuits to go all the way back to the main panel where it is bonded does this sound like a good correction?
Hey Victor thanks for your question. Maybe. The Word “Romex” is a registered trademark of Southwire Company. We have been asked to point that out, the correct term is Nonmetallic Sheathed Cable Type NM.
Using a grounded conductor for line to neutral loads while also using it as an effective ground fault current path is allowed for existing dryers and ranges as stated in 250.140 Exception. One of the exception conditions is that the conductor be insulated unless it is part of a Type SE cable and it terminates in service 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. 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.