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Monday, December 17, 2018

Question:

Re: CQD answer published Thursday, November 29, 2018 -External Equipment Bonding Jumper

Hi Charlie,

The answer you gave about the external bonding jumper not having to be run straight with the liquid tight flex doesn't appear to match the code words "routed with the raceway". Wrapping the bonding jumper around the flex would not be following the raceway or the wires inside

Thank you,

Jennifer

A

Answer:

Hey Jennifer thanks for your follow up question. I understand your point but proposal 5-191 for the 2005 NEC, which suggested the practice of spiraling equipment bonding jumpers be prohibited, was rejected. The panel statement was "Spiraling a conductor does not add significant impedance if limited to 6 ft." Even when spiraled around the raceway the equipment bonding jumper is essentially still routed with it.

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CHARLIE TROUT: 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. Even though Charlie passed away in October of 2015, his work continues in spirit. NECA continues to maintain this question forum for its many subscribers in memory and recognition of all his significant contributions to making the NEC what it is today.

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