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I NTRODUCT I ON HAZARDOUS LOCATION DATA

North American Zone Equipment Marking NEC Zone Equipment Marking The US marking requirements for equipment approved for Zone equipment are unique. Much like the Class/Division system, equipment approved to Zone Standards (UL 60079 Series) must be marked with the Zone in which they are suitable to be used as well as the Type of Protection. The “Ex” marking required in the IEC/CSA 60079 Standards is prefaced with the letter “A” or “AEx” to indicate the equipment is certified to US Standards. Prior to 2020, the NEC it was mandatory to include the applicable “Class” and Zone” on equipment. This changed in the NEC 2020 Edition to remove the “Class” marking with only the Zone marking being required. The US deviations to the IEC Standards permit the inclusion of “additional marking” for convenience (for example, Class/Division marking). NOTE: The CE Code does not recognize the “AEx” marking, However the CE Code recognize the use of “(A)Ex” where products are approved to both the CSA and UL versions of IEC 60079 Standards. Class I, Zone 1 l T5 G b A Ex e b II C Zone l US approval m Explosion Protection Type of Protection

CE Code Marking for Zone Equipment The CE Code uses the same marking system identified in the IEC 60079 Series of Standard. The Canadian deviations to the IEC Standards permit the inclusion of “additional marking” for convenience (for example, Class/Division and Zone location marking and (A)Ex, etc.). Users need to confirm the Type of Protection and Level of Protection is suitable for the location where the equipment is installed. The CE Code contains notes in Appendix B to recommend the used of the Equipment Protection Level (EPL) to determine the appropriate location of use. T5 G b Ex e b II C

Type of Protection Explosion Protection

Material Type (Surface industries - II = Gas, III = Dust) Material Group Temperature Code EPL Material (G = Gas, D = Dust) EPL Level of Protection (a, b, or c) Level of Protecton

Material Type (Surface industries - II = Gas, III = Dust) Material Group Temperature Code EPL Material (G = Gas, D = Dust) EPL Level of Protection (a, b, or c) Level of Protecton n

l Prior to 2021, NEC required equipment to marked with both Class and Zone, the applicable Zone marking is still required. m “AEx” identifies to US Standards. n Level of Protection was not required on older products. For example, both AEx e and AEx eb identify the same Type of Protection

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