What is NFPA 750?

NFPA 750 is the Standard on Watermist Fire Protection Systems and establishes minimum requirements for water mist technology based on sound engineering principles, test data and field experience. The 2023 edition recognises electronically operated water mist nozzles as a subcategory of automatic water mist nozzles:

3.3.25.2 Electronically-Operated Automatic Water Mist Nozzle. Nozzles that are normally closed and operated by electrical energy that is initiated and supplied by fire detection and control equipment.

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NFPA 750 places reliance on the procurement and installation of listed watermist equipment or systems that have demonstrated performance in fire tests as part of a listing process, and the manufacturer’s system design and installation manual.

8.1.1 Listing. Listed materials and devices shall be installed in accordance with their listing.
8.1.2 Design and Installation Manual. Materials and devices shall be installed in accordance with the manufacturer’s system design and installation manual.

Disclaimer: Users of NFPA Standards should be aware that these documents may be superseded at any time by issuance of a new edition, may be amended with the insurance of Tentative Interim Amendment (TIAs), or be corrected by Errata. Therefore, any previous edition of any NFPA Standard no longer represents the current NFPA Standard on the subject matter addressed, and users should refer to the latest edition, including any issued TIAs and Errata then in effect using the National Fire Code Subscription Service or the "List of NFPA Codes & Standards" at www.nfpa.org/docinfo.

Learn more - What is a watermist fire suppression system?