TIA Proposed for 2023 NEC Regarding Artificially Ventilated Rooms

The National Fire Protection Association (NFPA) recently released a proposed Tentative Interim Amendment (TIA) to the 2023 Edition of the National Electrical Code (NEC). The TIA was submitted by William T. Fiske, Intertek Testing Services NA, Inc., and has a comment closing date of August 30, 2022.

TIA Log No.: 1670

Reference: Article 100-Artificially Ventilated Room(new), 505.8(R)(new), 505.16(B)(3), 505.16(B)(3) Informational Notes 1 through 3, 505.20(C) Exception No. 2, 505.20(C) Informational Note No. 3, and Chapter 9, Table 13

Substantiation: This proposed TIA is necessary to define a new Type of Protection “v” for artificially ventilated rooms under the Zone system in Article 100, and to reference this new Type of Protection in Article 505 and Table 13 of the 2023 NEC. These references acknowledge the use of this Type of Protection as a new means to mitigate the risk of explosion in hazardous (classified) locations. Type of Protection “v” is included in ANSI/UL 60079-13, and this ANSI standard is already included in the Second Draft of the 2023 NEC for the new Type of Protection “p” for pressurized rooms. Type of Protection “v” was not initially included in the Second Draft of the 2023 NEC due to changes that were underway, but not yet completed, to the requirements in ANSI/UL 60079-13 so as to improve the consistency of application of the requirements. These changes have now been successfully completed, and Type of Protection “v” can now be included in the 2023 NEC.     

View the full proposed TIA for more information.