WAGO 750-306 Technical Description
Also see for DeviceNet 750-306: Manual
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Contents
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144 ï Application in Explosive EnvironmentsClassifications Meeting the NEC 500WAGO-I/O-SYSTEM 750DeviceNet6.4 Classifications Meeting the NEC 500The following classifications according to NEC 500 (National ElectricCode) are valid for North America.6.4.1 DivisionsThe "Divisions" describe the degree of probability of whatever type ofdangerous situation occurring. Here the following assignments apply:Explosion endangered areas due to combustible gases, fumes, mist and dust:Division 1 Encompasses areas in which explosive atmospheres are to be expectedoccasionally (> 10 h ≤ 1000 h /year) as well as continuously and long-term(> 1000 h /year).Division 2 Encompasses areas in which explosive atmospheres can be expected rarelyand short-term (>0 h ≤ 10 h /year).6.4.2 Explosion Protection GroupsElectrical components for explosion endangered areas are subdivided inthree danger categories:Class I (gases and fumes): Group A (Acetylene)Group B (Hydrogen)Group C (Ethylene)Group D (Methane)Class II (dust): Group E (Metal dust)Group F (Coal dust)Group G (Flour, starch and cereal dust)Class III (fibers): No sub-groups |
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