Add More Items
View All Quick Selects
Those areas in which flammable gases or vapors are or may be present in the air in sufficient quantities to produce explosive or ignitable mixtures.
Those areas made hazardous by the presence of combustible dust.
Those areas that are hazardous because of the presence of easily ignitable fibers or flyings, but in which such fibers or flyers are not likely to be in suspension in the air in quantities sufficient to procure ignitable mixtures.
Division One in the normal situation, the hazard would be expected to be present in everyday production operations or during frequent repair and maintenance activity.
Division Two in the abnormal situation, material is expected to be confined within closed containers or closed systems and will be present only through accidental rupture, breakage, or unusual faulty operation.
The gases of vapors of Class I locations are broken into four groups by the code. A, B, C, and D. Theses materials are grouped according to the ignition temperature of the substance, its explosion pressure and other flammable characteristics.
These groups are classified according to the ignition temperature and the conductivity of the hazardous substance.
Special fittings that are required either to prevent the passage of hot gasses in the case of an explosion in a Class I area of the passage of combustible dust, fibers, or flyings in a Class II or III area.
Explains in detail the requirements for the installation of wiring of electrical equipment in hazardous locations. These articles along with other applicable regulations, local governing inspection authorities, insurance representatives, and qualified engineering/technical assistance should be your guides to the installation of wiring or electrical equipment in any hazardous or potentially hazardous location.
NOTE: fibers and flyings are not likely to be suspended in the air, but can collect around machinery or on lighting fixtures and where heat, a spark, or hot metal can ignite them.