482 Parker Hannifin Corporation Fluid Control Division Europe General Catalogue FCDE/0110/UK/V2.0 Fluid Control Solutions Europe General Catalogue FCSE/0112/UK V2.2 07/2022 DEFINITIONS HAZARDOUS LOCATION CLASSIFICATION ¹ (CEC): Code Canadien d’Electricité / ² (NEC): National Electrical Code Explosive Environment Continuous Presence Intermittent Presence (normal operation conditions) Occasional Presence (abnormal operation) IEC Zone 0 (gas) Zone 20 (dust) Zone 1 (gas) Zone 21 (dust) Zone 2 (gas) Zone 22 (dust) Europe Zone 0 (gas) Zone 20 (dust) Zone 1 (gas) Zone 21 (dust) Zone 2 (gas) Zone 22 (dust) Canada (CEC)¹ USA (NEC) ² Cl. I Div. 1 (gas) Cl. II Div. 1 (dust) Cl.III Div. 1 (fibres) Cl. I Div. 1 (gas) Cl. II Div. 1 (dust) Cl.III Div. 1 (fibres) Cl. I Div. 2 (gas) Cl. II Div. 2 (dust) Cl.III Div. 2 (fibres) ZONES The hazardous areas are classified in zones based on the frequency of the occurrence and the duration of an explosive gas environment as follows: Zone 0 (20) Zone 1 (21) Zone 2 (22) An area in wich an explosive gas (dust) atmosphere is present CONTINUOUSLY or is present for LONG PERIODS (~1000 h/y). Mode of protection: ia - ta … An area in wich an explosive gas (dust) atmosphere is present LIKELY TO OCCUR in normal operation (~10 to 999 h/y). Mode of protection: db - mb - eb - tb... An area in wich an explosive gas (dust) atmosphere is not LIKELY TO OCCUR and if it does occur it will exist for short period only (~1 to 10 h/y). Mode of protection: ec - tc... Example: EXPLOSIVE ENVIRONMENTS
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