National Electrical Installation Standards

Standards as High as Your Own

Tuesday, November 7, 2023


Hello Charlie, I disagree with your answer to the question for September 29, 2023. A building under construction that did not exist prior to the adoption of the current code, would NOT be considered an existing buildings or structures per the definition in the International Existing Building Code.

As such, the provisions of the exception in Section 250.50 would not be applicable. Since 250.50 specifically requires all electrodes, present be used the AHJ would be correct to require the rebar be exposed for connection of the concrete encased electrode.

It is up to the builder to ensure that the electrician is involved prior to the pouring of the footing or otherwise making the connection accessible. Regards, Jeff Bower


Hi Jeff, thanks providing your opinion on the application of the Exception to Section 250.50. In general, the definition of an “Existing Building” found in the IEBC would not have any bearing on the application of the rules found in the NEC®. The exception found in Section 250.50 was specifically included by CMP 5 to provide relief for situations where the foundation/footings were completed before the electrical contractor was onsite, or in some cases before the electrical contractor was even hired. The exception provides latitude for the local AHJ to use discretion in the application of this requirement based on the circumstances. States and local Municipalities may enforce it differently based on statute or ordinances, which is why it is always important to check with the local AHJ.  

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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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