Guide to Hazardous Locations - FM Approvals

1 Guide to Hazardous LocationsExplosive Gas AtmospheresFirst Characteristic NumeralSecond Characteristic NumeralProtection against solid bodiesProtection against liquid0No protectionNo protection1 Objects greater than 50mmVertical (90 ) dripping water2 Objects greater than 12mm75 to 90 dripping water3 Objects greater than water4 Objects greater than 1mmSplashed water5 Dust-protectedWater jets6 Dust-tightHeavy seas7 Temporary immersion8 Continuous immersion9 High pressure/temperature water jetApproximate US enclosure type equivalent to IPXXType IPType IPType IP1103S546 and 6P672114 and 4X5512 and 12K5235455213543R14 Ingress Protection (IP) CodesATEXA tmosph re explosibleCACanadaCE CodeCanadian Electrical Code (CSA )EPLE quipment Protection LevelEUEuropean UnionIECI nternational Electrotechnical SafetyMSHAMine Safety and Health AdministrationNFPAN ational Fire Protection AssociationNEC National Electrical Code (NFPA 70)USUnited States of AmericaAcronymsType of ProtectionCodeMarketApplicationStandardP rotection PrincipleGeneral RequirementsUSClass I, Division 1 & 2FM 3600 CAClass I, Division 1 & 2 CSA No.

2 0 AExUSClass I, Zone 0, 1 & 2 ANSI/UL 60079-0 ExCAZone 0, 1, & 2 CSA No. 60079-0 ExEUCategory 1G, 2G, & 3 GEN IEC 60079-0 ExIECEPL Ga, Gb, Gc IEC 60079-0 Increased SafetyAEx eb (or AEx e)USClass I, Zone 1 ANSI/UL 60079-7No arcs, sparks or hot surfaces Ex eb (or Ex e)CAZone 1 CSA No. 60079-7Ex ebEUEPL GbEN IEC 60079-7Ex ebIECEPL GbIEC 60079-7 AEx ecUSClass I, Zone 2 ANSI/UL 60079-7Ex ecCAZone 2 CSA No. 60079-7Ex ecEUCategory 3 GEN IEC 60079-7Ex ecIECEPL GcIEC 60079-7 Non-Incendive(NI)USClass I, Division 2FM 3611(NI)CAClass I, Division 2 CSA No. 213 Explosionproof(XP)USClass I, Division 1FM 3615 Contain the explosion and extinguish the flame(XP)CAClass I, Division 1 CSA No. 30 FlameproofAEx daUSClass I, Zone 0 ANSI/UL 60079-1Ex daCAZone 0 CSA No. 60079-1Ex daEUCategory 1 GEN 60079-1Ex daIECEPL GaIEC 60079-1 AEx db (or AEx d)USClass I, Zone 1 ANSI/UL 60079-1Ex db (or Ex d)CAZone 1 CSA No.

3 60079-1Ex dbENCategory 2 GEN 60079-1Ex dbIECEPL GbIEC 60079-1 AEx dcUSClass I, Zone 2 ANSI/UL 60079-1Ex dcCAZone 2 CSA No. 60079-1Ex dcEUCategory 3 GEN 60079-1Ex dcIECEPL GcIEC 60079-1 Powder-FilledAEx qb (or AEx q)USClass I, Zone 1 ANSI/UL 60079-5Ex qb (or Ex q)CAZone 1 CSA No. 60079-5Ex qbEUCategory 2 GEN 60079-5Ex qbIECEPL GbIEC 60079-5NI ComponentAEx nCUSC lass I, Zone 2 ANSI/UL 60079-15Ex nCCAZone 2 CSA No. 60079-15Ex nCEUC ategory 3 GEN IEC 60079-15Ex nCIECEPL GcIEC 60079-15 Intrinsic Safety( )USClass I, Division 1FM 3610 Limit energy of sparks and surface temperature( )CAClass I, Division No. 60079-11 or CSA No. 157 AEx iaUSClass I, Zone 0 ANSI/UL 60079-11Ex iaCAZone 0 CSA No. 60079-11Ex iaEUCategory 1 GEN 60079-11Ex iaIECEPL GaIEC 60079-11 AEx ibUSClass I, Zone 1 ANSI/UL 60079-11Ex ibCAZone 1 CSA No. 60079-11Ex ibEUCategory 2 GEN 60079-11Ex ibIECEPL GbIEC 60079-11 AEx ic USClass I, Zone 2 ANSI/UL 60079-11Ex icCAZone 2 CSA No.

4 60079-11Ex icEUCategory 3 GEN 60079-11Ex icIECEPL GcIEC 60079-11 Note 1: For associated intrinsically safe apparatus suitable for installation in a Hazardous location, the symbols for the type of protection ia or ib are enclosed within square brackets ( , Class I, Zone 1 AEx db [ia Ga] IIC T4 Gb).Note 2: For associated intrinsically safe apparatus not suitable for installation in a Hazardous location, both the symbol Ex or AEx and the symbol for the type of protection ia , ib or ic are enclosed within the same square brackets ( , [AEx ia Ga]); in this case, a temperature class is not XUSC lass I, Division 1FM 3620 (NFPA 496)Keepflammablegas outType XCAC lass I, Division 1 NFPA 496 Type YUSC lass I, Division 1FM 3620 (NFPA 496)Type YCAC lass I, Division 1 NFPA 496 Type ZUSC lass I, Division 2FM 3620 (NFPA 496)Type ZCAC lass I, Division 2 NFPA 496 AEx pxb (or AEx px)USClass I, Zone 1 ANSI/UL 60079-2Ex pxb (or Ex px)CAZone 1 CSA No.

5 60079-2Ex pxbEUCategory 2 GEN 60079-2Ex pxbIECEPL GbIEC 60079-2 AEx pyb (or AEx py)USClass I, Zone 1 ANSI/UL 60079-2Ex pyb (or Ex py)CAZone 1 CSA No. 60079-2Ex pybEUCategory 2 GEN 60079-2Ex pybIECEPL GbIEC 60079-2 AEx pzc (or AEx pz)USClass I, Zone 2 ANSI/UL 60079-2Ex pzc (or Ex pz)CAZone 2 CSA No. 60079-2Ex pzcEUCategory 3 GEN 60079-2Ex pzcIECEPL GcIEC 60079-2 Note 3: For associated equipment used with pressurized equipment, such as a pressurization control system installed within the Hazardous location, the symbol for the Type of Protection is enclosed within brackets ( , Ex db [pxb] IIC T4 Gb).Note 4: The associated equipment not suitable for installation in a Hazardous location, both the symbol Ex or AEx and the symbol pxb are enclosed within the same square brackets ( , [AEx pxb Gb]). In this case, a temperature class is not BreathingAEx nRUSC lass I, Zone 2 ANSI/UL 60079-15Ex nRCAZone 2 CSA No.

6 60079-15Ex nREUC ategory 3 GEN IEC 60079-15Ex nRIECEPL GcIEC 60079-15 EncapsulationAEx maUSClass I, Zone 0 ANSI/UL 60079-18Ex maCAZone 0 CSA No. 60079-18Ex maEUCategory 1 GEN 60079-18Ex maIECEPL GaIEC 60079-18 AEx mb (or AEx m)USClass I, Zone 1 ANSI/UL 60079-18Ex mbCAZone 1 CSA No. 60079-18Ex mbIECEPL GbIEC 60079-18Ex mbEUCategory 2 GEN 60079-18 AEx mcUSClass I, Zone 2 ANSI/UL 60079-18Ex mcCAZone 2 CSA No. 60079-18Ex mc EUCategory 3 GEN 60079-18Ex mcIECEPL GcIEC 60079-18 Sealed DeviceAEx nCUSC lass I, Zone 2 ANSI/UL 60079-15Ex nCCAZone 2 CSA No. 60079-15Ex nCEUC ategory 3 GEN IEC 60079-15Ex nCIECEPL GcIEC 60079-15 Liquid ImmersionAEx ob (or AEx o)USClass I, Zone 1 ANSI/UL 60079-6Ex obCAZone 1 CSA No. 60079-6Ex obEUCategory 2 GEN 60079-6Ex obIECEPL GbIEC 60079-6 AEx ocUSClass I, Zone 2 ANSI/UL No. 60079-6Ex ocCAZone 2 CSA No. 60079-6Ex ocENCategory 3 GEN 60079-6Ex ocIECEPL GcIEC 60079-6 Note 5.

7 For the US, the marking of Class I for Zones 0, 1, or 2 is ConceptsFlammable Material Present ContinuouslyFlammable Material Present IntermittentlyFlammable Material Present AbnormallyIEC / EUZone 0 Zone 1 Zone 2US (NEC 505) US (NEC 500)Zone 0 Zone 1 Zone 2 Division 1 Division 2CA (CE Code Section 18) CA (CE Code Annex J18)Zone 0 Zone 1 Zone 2 Division 1 Division 2 IEC classification per IEC 60079-10-1 EU classification per EN 60079-10-1US classification per ANSI/NFPA 70 National Electrical Code (NEC ) Article 500 or Article 505CA classification per CSA Canadian Electrical Code (CE Code) Section 18 or Annex JArea ClassificationTypical gasUS (NEC 505) CA (CE Code Section 18) EU IECUS (NEC 500)CA (CE Code Annex J18)AcetyleneGroup IICC lass I/Group AHydrogen(Group IIB + H2)Class I/Group BEthyleneGroup IIBC lass I/Group CPropaneGroup IIAC lass I/Group DMethaneGroup I*Mining**Not within scope of NEC.

8 Under jurisdiction of MSHA. Not within scope of CE GroupingMarkingUS (NEC 505) CA (CE Code) Section 18) EU IEC US (NEC 500)CA (CE Code Annex J18)450 CT1T1300 CT2T2280 CT2A260 CT2B230 CT2C215 CT2D200 CT3T3180 CT3A165 CT3B160 CT3C135 CT4T4120 CT4A100 CT5T585 CT6T6 Temperature ClassDefinitionIECEU (ATEX)Typical Zone of ApplicationEPLG roupCategoryGroupMines, very high level of protectionMaIM1IN/AMines, high level of protectionMbM2 Gas atmospheres, very high level of protectionGaII1 GII0 Gas atmospheres, high level of protectionGb2G1 Gas atmospheres, enhanced level of protectionGc3G2 Level of protection assigned to equipment based on its likelihood of becoming a source of ignitionEPL/CategoryFM Approvals 1151 Boston-Providence Turnpike, Norwood, MA, US 02062-9102 Phone: +1 (1)781 255 4851 Fax: +1 (1)781 762 9375 E-mail: Europe, FM Approvals Europe LimitedOne Georges Quay Plaza, Dublin 2, D02 E440, IrelandP0296 2013 FM Approvals (Rev.

9 05/2020) All rights reserved. Ex MarkingUS (NEC 500) and CA (CE Code Annex J18)Type of Protection(optional except for )Permitted ClassExplosionproof for Class I, Division 1, Groups A, B, C, D T5 Permitted Division (optional except for Division 2) Permitted Group Temperature Class(T5 and T6 optional)Ambient temperature ranges other than standard (-25 C Ta +40 C) must be marked. US (NEC 505) Class I, Zone 1, AEx db [ia Ga] IIC T5 GbPermitted OutputExplosion-ProtectedGas GroupAmerican National StandardTemperature ClassType of ProtectionPermitted Class (optional)Ambient temperature ranges other than standard (-20 C Ta +40 C) must be (CE Code Section 18), EU and IECEx db [ia Ga] IIC T5 OutputGas GroupTemperature ClassType of ProtectionEquipment Protection LevelEquipment Protection LevelAmbient temperature ranges other than standard (-20 C < Ta < +40 C) must be Protection Level (optional)Additional EU marking per 2014/34/EU (ATEX) 2809II 2(1) GIdentification Number of Notified BodyInvolved in Production Control Stage Explosion Protection MarkingCE Conformity MarkingEquipment Group I (for mines) II (for other than mines)Category 1 (for Zone 0) 2 (for Zone 1) 3 (for Zone 2)

10 Type of Exposive Atmosphere: G (for gas, vapor, mist)Category for OutputMarketRecognized product certification marksUSCanadaEU (ATEX)FM Approvals can also issue IECEx Test Reports, Quality Assessment Reports and Certificates of Approvals is your global conformity assessment solutio