National Electrical Installation Standards

Standards as High as Your Own

Monday, May 15, 2023


Hi Code Friends. Does the Code permit the installation of wires and breakers made and shipped from China/Overseas? Where can I find what listings are acceptable in the United States? Thank you, C. Michaels


Hello C. Michaels, thank you for participating in the CQD. The NEC® does not limit the use of electrical equipment to specific manufacturers or certain Countries of origin. Electrical equipment, regardless of who, or where it is made, must be approved in accordance with Section 110.2, and listing has a large role in that approval process at times. Additonally, certain equipment must be listed when required by a specific Code Section. The 3rd party performing the certification and listing of electrical equipment/components are Nationally Recognized Testing Labs or NRTLs. OSHA has an NRTL program, recognizing qualified electrical testing labs performing product certification. A current list of NRTLs in OSHA’s program can be found here.

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. 

UPDATE YOUR SUBSCRIPTION PREFERENCES: Subscribe or Unsubscribe from this list.