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Friday, September 7, 2018

Question:

Hi Charlie, what are your thoughts on residential grade devices installed at other than a dwelling? Another example: A Home Version load center at a commercial installation? Let's say 110.10, 110.28, etc have been met. I think the answer might lie in 110.3 and it's about researching all components.

Thanks for your great forum!

Norm Feck

A

Answer:

Hey Norm thanks for your question and the compliment. I substituted A Home Version for the specific manufacturer. In certain situations, the NEC specifies a grade of product such as "hospital grade" as stated in 517.18(B). In general receptacles must be listed as stated in 406.3(A) - but no specific grade is given. Similarly, panelboards (loadcenters) do not have a specific grade requirement in Article 408.

You are correct, researching the manufactures information, following any instructions for listed equipment and using equipment as intended by the manufacturer are important.

ABOUT CQD: The Code Question of the Day (CQD) is NECA and ELECTRICAL CONTRACTOR Magazine’s flagship National Electrical Code (NEC®) public forum for the industry, sponsored by EATON. The daily distribution of Q&A generates a lively dialogue and shares relative Code-based practical responses.

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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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