NEMA SPECIFICAITONS

National Electrical Manufacturers Association Publication #250 The following NEMA specifications are met by Texas Industrial Peripherals' industrial keyboard and pointing device products:

DESCRIPTIONS, APPLICATIONS AND FEATURES OF ENCLOSURES FOR NONHAZARDOUS LOCATIONS

TYPE 4 ENCLOSURES
Type 4 enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure. They are not intended to provide protection against conditions such as internal condensation or internal icing.

TYPE 4X ENCLOSURES
Type 4X enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure. they are not intended to provide protection against conditions such as internal condensation or internal icing.

TYPE 12 ENCLOSURES
Type 12 enclosures are intended for indoor use primarily to provide a degree of protection against circulating dust, falling dirt, and dripping noncorrosive liquids. They are not intended to provide protection against such conditions as internal condensation. COMPARISON BETWEEN NEMA ENCLOSURE TYPE NUMBERS AND IEC ENCLOSURE CLASSIFICATION DESIGNATIONS

TABLE A-1 CONVERSION OF NEMA TYPE NUMBERS TO IEC CLASSIFICATION DESIGNATIONS (CANNOT BE USED TO CONVERT IEC CLASSIFICATION DESIGNATIONS TO NEMA TYPE NUMBERS)