USFA Coffee Break Training:Electrical ‘Classified Locations: Flammable Vapors and Gases’

Flammable vapors and gases emitted into the atmosphere create conditions that could result in a fire or explosion in the presence of electrical equipment. The below firefighter training vignette from the United States Fire Administration (USFA), “Electrical ‘Classified Locations: Flammable Vapors and Gases’ “ is part of a 10-part series on how electrical equipment and hazardous areas are classified to minimize the risk of fire or explosion.

USFA Coffee Break Training provides an overview of fire protection topics and does not include all details, requirements or exceptions to the topics that are described. Always refer to nationally recognized design and installation codes and standards, the product manufacturer, or listing details for specific information. Interpretations of codes and standards are the responsibility of the code official or authority having jurisdiction.  

Download the training as a PDF HERE.

The Coffee Break Training quarterly self-assessment exams have been moved to NFA Online.  There you will find links to the previous Coffee Break exams and other Fire Prevention: Technical training.


The National Fire Protection Association (NFPA) will be offering free live web updates on changes to NFPA sprinkler-related codes. The changes were brought about by Tentative Interim Amendments (TIAs) regarding the use of antifreeze in sprinkler systems.

“Based on recent full scale testing of various antifreeze concentrations in sprinkler systems, NFPA 13, NFPA 13R, NFPA 13D, and NFPA 25 have modified the requirements for antifreeze usage through recently approved TIA’s,” said Matthew Klaus, senior fire protection engineer, who will host the Web updates. “The purpose of these broadcasts is to provide a brief history on the use of antifreeze in sprinkler systems along with an explanation of the new requirements and a discussion of alternatives to antifreeze.

Participants will have an opportunity to ask questions following the presentation.

The update will be broadcast on June 28, July 7, and July 19. For more information and to register, visit


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