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811TECHNICAL DATADATA SUBJECT TO CHANGE WITHOUT NOTICE.Notes: 1) Group 1 of the IEC & Cenelec Codes is for mining ( underground locations ) This application does not fall within thescope of the NEC & CEC.2) The NEC has 14 levels for surface temperature whereby the IEC & Cenelec has only 6.CLASSIFICATION IEC, CENELEC NEC 505, NEW CEC INSTALLATION CODESNEC 500, OLDER EXISTING CEC INSTALLATIONS CODESMATERIAL PRESENCEContinuously Present Zone 0 Division 1Intermittently present Zone 1 Division 1Abnormally Present Zone 2 Division 2APPARATUS GAS & VAPORSAcetylene Group II C Class I / Group AHydrogen Group II B Class I / Group BEthylene Group II B Class I / Group CPropane Group II A Class I / Group DMethane Group I N/AMAX SURFACE TEMPERATURE450 C T 1 T 1300 C T 2 T 2280 C %u2014 T 2A 260 C %u2014 T 2B230 C %u2014 T 2C215 C %u2014 T 2D200 C T 3 T 3180 C %u2014 T 3A 165 C %u2014 T 3B160 C %u2014 T 3C135 C T 4 T 4120 C %u2014 T 4A100 C T 5 T 585 C T 6 T 6The Hazardous Location for Gases and Vapors can be summarized as per Table 1Table 1 : HAZARDOUS LOCATION CLASSIFICATIONSHazardous Locations due to flammable substances such as dust or powders ( Class I I ) and fibers. ( Class I I I ) is handled the same way in both Canada and the U.S. by using the Class and Division method. The type of dust is also a factor. The IEC uses the zone method, which is based on how often the hazard is present. The type of dust or powder is not a consideration nor are fibers treated as a separate hazard. The Hazardous Location for Dust, Powders and Fibers can be summarized as per Table 2 Table 2 : HAZARDOUS LOCATION CLASSIFICATIONSCLASSIFICATION IEC, CENELEC CODES NEC 500, CEC CODESMATERIAL PRESENCEContinuously Present Zone 20 Division 1Intermittently present Zone 21 Division 1Abnormally Present Zone 22 Division 2APPARATUS DUST & POWDERSMetal %u2014 Class I I / Group ECoal Group I I Class I I / Group FGrain Zones 20,21,22 Class I I / Group GFibers ( all ) %u2014 Class I I I Class I I & Class I I ICLASSIFICATION OF HAZARDOUS LOCATIONS