IEEE Guide for the Application of Electric Motors in Class I, Division 2 Hazardous (Classified) Locations

Abstract

This paper presents an overview of IEEE 1349- 2001. a Guide that assists individuals, organizations, and suppliers with the application of motors in Class I, Division 2 locations, where flammable gases and vapors may occasionally be present. (I) Three-phase and single-phase AC synchronous and induction electric motors in sizes from fractional horsepower and larger are covered in the Guide. Primary emphasis is on the use of general-purpose endosures and precautions against excessive sutface temperatures and sparking of rotor bars and enclosure joints. The Guide also provides guidance for maintaining the lie integnty of motors in Division 2 locations. Existing codes and standards, such as the National Eledrical Code (NEC). contain cautionary notes for general-purpose motor applications in Division 2 areas. This Guide dmments industry experience and established practices .for the application of general-purpose motors in Division 2 locations and provides guidance for applying motors in these locations. It is not a specification and is not intended to be used as a specification for purchasing motors installed in Division 2 locations. This paper does not replace the Guide, but should be used to supplement and understand the Guide. Significant motor temperature information is contained in the Guide including maximum recommended Division 2 exposed surface temperatures at full load. Manufacturers. users, and other industry experts worked about 8 years to develop this consensus standard. It was approved by the IEEE-SA Standards Board in December of 2001 and published in June Of 2002. Index Terms - Motors, Hazardous Locations, Amng. Sparking, Surface Temperature, Rotor, Stator, Heaters. Class I Division 2.