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Tuesday, March 3, 2015

Question:

Re: CQD answer published Friday, February 20, 2015 - Gas Line Separation 1

Charlie,

The NEC might not require a separation but the NESC does.  The NESC requires that “Radial separation of supply and communications cables or conductors from steam lines, gas, and other lines that transport flammable material shall be not less than 300 mm (12 inches) …” There is an exception to this but only if the supply conductors are less than 300 V between conductors “provided supplemental mechanical protection is used to limit the likelihood of detrimental heat transfer …” and also that there is “agreement to the reduced separation by all utilities involved …” I know that the NESC is NOT the NEC and probably would not apply in this case but it is worth noting.

Tom Adams

A

Answer:

Hey Tom good to hear from you and thanks for your comment. That is good information to know and it might be convincing enough to persuade the customer to follow 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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