National Electrical Installation Standards

Standards as High as Your Own

?
Wednesday, March 31, 2021

Question:

Greetings and thank you for a great forum.

I would like to inquire if NEC Article 430.32(A), (B), or (D) applies to commercial kitchen hood exhaust fan motors or if 430.44 is an option to exclude exhaust hood motor overload protection. Does NFPA 96 exclude commercial kitchen hood fan motors from this overload device requirement? I would suggest that a kitchen exhaust fan motor may be called upon to run indefinitely much as 695.6(C) requires of fire pump circuits to not have overload protection.

Thank you much.

Kelly Stockwill

A

Answer:

Hi Kelly,

You have a few questions here and we'll try to address each of them. Section 430.32(A), (B), and (C)  are general motor overload requirements. Section 430.44 appears to relax the requirement for overload protection with alternatives to address hazards to persons or equipment. These types of alternatives are often utilized in industrial and manufacturing assembly line operations. Check with the local AHJ on application of 430.44 to your specific application. NFPA 96 is titled  Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations. Chapters 8 and 9 of NFPA 96 refer to the NEC for electrical wiring requirements. Listed exhaust systems may have requirements for interlocks and other extended motor run time considerations, but those would have to meet the system manufacturer's installation instructions. There may be initial test and commissioning requirements as well.

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 codequestion@necanet.org

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.