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NFPA 499: Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas
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The next edition of this standard is now open for Public Input.

Revision cycle information
Revision Cycle: Annual 2020
Next Edition: 2021
First Draft
Public Input Closing Date: 6/27/2018 Submit Public Input online  
First Draft Report Posting Date: 2/27/2019
Second Draft
Public Comment Closing Date: 5/8/2019
Second Draft Report Posting Date: 1/22/2020
Motions Committee Report (NITMAM)
Motions Committee Report (NITMAM)
NITMAM Closing Date: 2/19/2020
NITMAM Posting Date: 4/1/2020
Additional Committee Information

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