Explosive atmospherecombustible material explosion hazard

permanent occasional short-termclass Igas NEC 500 division 1 division 2

ATEX/IECEx/NEC 505 zone 0 zone 1 zone 2class IIdust NEC 500 division 1 Division 2

ATEX/IECEx/NEC 505 zone 20 zone 21 zone 22class IIIfi bers and lint NEC 500 division 1 division 22D Db in case of predictable faults 21

Classifi cation of explosive atmosphereATEX/IECEx/NEC 505 NEC 500

mining group Imethane I mininggas group II class Ipropane IIA CI I, Group Dethylene IIB CI I, Group Chydrogen IIC CI I, Group Bacetylene IID CI I, Group Adust/fi bers group III class II, IIIfi bers and lint IIIA CI IInon-conductive dust IIIB CI II, Group F, Gconductive dust IIIC CI II, Group E

Beckhoff_Explosionsschutz_052018_druck_e.indd 1 27.07.2018 11:01:32