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SAFETY. EVERYWHERE. Non-electrical equipment IECEx (dust) IECEx: International Explosion protection NEC: Explosion protection for USA ATEX: Explosion protection for Europe Equipment category and Equipment protection level (EPL) Types of protection for electrical equipment in explosive atmospheres Ex labelling also available as an app: Main application Sufﬁcient security general requirements increased safety junction boxes, control stations for installing Ex-components (with a different type of protection), squirrel-cage motors, light ﬁttings ﬂameproof enclosures switchgears, control stations, indicating equipment, control systems, motors, transformers, heating equipment, light ﬁttings pressurized enclosures switchgear and control cabinets, analysers, large motors intrinsic safety instrumentation technology, ﬁeldbus technology, sensors, actuators [Ex ib] = associated electrical apparatus – installation in the safe area: iaD = Einsatz in Zone 20, 21, 22 ibD = Einsatz in Zone 21, 22 intrinsically safe systems Equipment category Mines susceptible to ﬁredamp during rare malfunctions until de-energizing of the equipment during rare malfunctions during expected malfunctions Explosive dust atmosphere during rare malfunctions during expected malfunctions (1)G associated apparatus – installation in non-hazardous area liquid immersion IEC/CENELEC/NEC 505/NEC 506 Mines susceptible to ﬁredamp switchgear with small capacity, control and signalling units, display units, sensors: maD = Einsatz in Zone 20, 21, 22 mbD = Einsatz in Zone 21, 22 all electrical equipment for Zone 2 op is = inherently safe optical radiation op pr = protected optical radiation op sh = optical radiation interlock switchgear, control stations, junction boxes, control boxes, motors, light ﬁttings nA = non-sparking device nC = sparking devices and components nR = restricted breathing enclosures Hydrogen Acetylene old identiﬁcation: tD A21 = under procedure A for Zone 21 tD B21 = under procedure B for Zone 21 Explosive dust atmosphere Class II, Class III Subdivisions Typical dust Types of protection for non-electrical equipment in explosive atmospheres Type of protection combustible ﬂyings non-conductive dust non-conductive dust conductive dust carbonaceous dust combustible metal dust Main application basics method and requirements Gas Temperature Classes Equipment marking NEC 500 Maximum surface temperature Gas Temperature Classes Equipment marking NEC 500 constructional safety couplings, pumps, gear drives, chain drives, belt drives brakes, couplings pressurisation pumps control of ignition sources pumps, beld drives Temperature classification Maximum surface temperature ﬂameproof enclosures submerged pumps, gears equipment only for Zone 2 or Zone 22 Dust: indication of the max. surface temperature in °C. LIGHTING AND SIGNALLING ID 103061 | 2016-02 / EN-07 | printed in Germany Methane Group sensors, display units, electronic ballasts, transmitters optical radiation Not likely to occur and for short period only transformers, starting resistors powder ﬁlling Continously, longterm Occasionally or frequently Dangerous explosive atmosphere SYSTEM AND INTEGRATED SOLUTIONS R. STAHL, Am Bahnhof 30, 74638 Waldenburg, Germany, T +49 7942 943-0, F +49 7942 943-4333, r-stahl.com MARINE OFFSHORE Explosion protection by R. STAHL is always state-of-the-art – and guarantees the safety of people, machines

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