Which type of fire does NFPA 17 primarily address?

The NFPA 17 Standard specifically addresses the use of dry chemical extinguishing systems, which are primarily designed for fires involving flammable liquids and gases, as well as electrical equipment. This is because dry chemical agents are effective against Class B fires (those involving flammable liquids and gases) and Class C fires (those involving energized electrical equipment). The standard outlines the requirements for the design, installation, maintenance, and testing of these systems to ensure they can effectively suppress such fires.

In contrast, the other options do not accurately reflect the primary focus of NFPA 17. While fires involving wood and paper fall under Class A, those caused by cooking oils are typically Class K, and fires related to solid combustible materials also belong to Class A. Although these categories are important in fire protection, they do not fall under the guidelines set by NFPA 17 for dry chemical systems, which are explicitly aimed at combating Class B and C fires.