What does Non-incendive: Class 1 Division 2, Grade A-D, T4 mean?

Nonincendive, Class I, Division 2, Group A-D, T4 is a special certification that qualifies the Cat S48c for use in hazardous work environments where concentrations of flammable gasses or mists are not normally present in an explosive concentration (but may accidentally exist). Devices certified Nonincendive, Class I, Division 2 are specially engineered so they do not produce arcs, sparks or hot surfaces during their operation.

The rating makes it an ideal solution in delivering safety, confidence and protection to work crews for industries such as petroleum refineries, and gasoline storage and dispensing areas; dry cleaning plants where vapors from cleaning fluids can be present; spray finishing areas; aircraft hangers and fuel servicing areas; and utility gas plants and operations involving storage and handling of liquefied petroleum gas or natural gas and pharmaceuticals.