Zone _ _ Gas Dust Element 0 = gas 2 = dust Risk 0 = high 1 = medium 2 = low

Zone 00 Zone 20 High 1 Zone 01 Zone 21 Medium 2 Zone 02 Zone 22 Low 3 Gas Dust Risk Admitted fixture cathegory

Zone 00 Zone 20 Zone 01 Zone 21 Zone 02 Zone 22 Gas Dust Cathegory 3

Zone 00 Zone 20 Zone 01 Zone 21 Zone 02 Zone 22 Gas Dust Manufacturers certificate Third party certificate

Zone 02 Zone 22 Wood Industry Chemical Ind. Pharmaceutical Food Industry Paint plants

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Group II Cat 3G Ex nA IIB T4 Group II Cat 3D Ex tD A22 T6 ZONE 02 ZONE 22

Group II Cat 3G Ex nA IIB T4 Group II Cat 3D Ex tD A22 T6 ZONE 02 ZONE 22 Group I = mines Group II = all the rest Cathegory 3 fixture G=Gas D=Dust Protection type nA=gas tD=dust Test method (IIB gas) (tD dust) Temperature Class