Perform accurate hazardous (classified) area classification in chemical manufacturing facilities!

Determine the need for, and extent of, Class I (flammable liquids, gases, and vapors), Division and Zone area classification using NFPA 497. This document contains detailed guidelines and diagrams that assist in Class I hazardous (classified) area classification for the purpose of properly selecting and installing electrical equipment that will not be an ignition source in environments where flammable or combustible liquids, gases, or vapors are processed or handled.

NFPA 497 also provides extensive data on physical properties of selected materials, including specific Class I, Division and Zone gas group information. The 2004 edition includes definitions of hazardous (classified) locations parallel with the National Electrical Code®. Revised per NFPA's Manual of Style.