National Electrical Installation Standards

Standards as High as Your Own

Thursday, April 9, 2020


SAFETY REMINDER: Today the Code Question of the Day offers an important safety reminder: Check the operation of all ground-fault circuit interrupter protective devices at least once per month. Replace any GFCI devices that are inoperative. If you are not trained to perform this work, hire a qualified contractor or person to perform these tasks. 


Related Code Sections: There are multiple rules throughout the NEC that require GFCI protection. Test and reset buttons are provided on the GFCI devices. GFCI protection is listed to UL 943. Article 100 provides a detailed definition of the term Ground-Fault Circuit Interrupter (GFCI). The requirement to performance test them is provided by the manufacturers and is contained in the use and installation instructions that are provided with the device. Section 110.3(B) indicates that listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling.

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.

SUBMIT YOUR CODE QUESTION: Click here to submit a question to for inclusion in an upcoming edition of the Code Question of the Day, or email

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.

NECA STANDARDS: NECA publishes the National Electrical Installation Standards™ (NEIS™), a series of ANSI-approved performance and quality standards for electrical construction. NEIS can be purchased in the NECA Store in three formats: a printed or PDF download of a standard or, as an annual subscription service.

NECA SAFETY PRODUCTS & PUBLICATIONS: NECA produces electrical safety publications and products for the industry including jobsite safety guides, handbooks and resource kits. View a full listing of available resources and products »

IMPORTANT NOTICE: Unless the question requests a response based on a specific edition, all answers are based on the latest edition of NFPA 70® National Electrical Code®.

This correspondence is not a formal interpretation of the NEC® and any responses expressed to the questions are opinions and do not necessarily represent the official position of NECA, NFPA, the NEC Correlating Committee any Code-making panel or other electrical technical committee. In addition, this correspondence is neither intended, nor should it be relied upon, to provide professional consultation or services. 

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