In what class are areas with flammable gases classified under the NEC?

The classification of areas with flammable gases under the National Electrical Code (NEC) is indeed Class I. This classification is specifically designated for locations where flammable gases or vapors may be present in sufficient quantities to create an explosive or ignitable atmosphere.

In Class I, Division 1, the presence of ignitable concentrations of flammable gases or vapors can occur under normal operating conditions. This means that the environment is at a higher risk because these substances can be continuously present or may be present frequently, particularly in facilities such as refineries, chemical plants, or places that handle natural gas.

Understanding this classification is crucial for ensuring that proper safety measures, including equipment and installation practices, are implemented to minimize the risk of ignition and explosions in these hazardous areas.