Guide to Hazardous Locations

ATEX / IEC USA / Canada Marking

Example marking Example Zone scheme marking

ATEX certificate number

DEKRA 20 ATEX 0105 X Zone scheme gas*
Zone 0 AEx ia IIC T4 Ga
EU type-examination certificate Additional conditions
Zone scheme dust*
Zone 0 AEx ta IIIC T90°C Da
Class zone, (NEC505, NEC506)
ID no. Notified body Country IECEx-certified Year of ATEX-certified Certificate ID Conditions
Ex equipment certifi­ Ex equipment number
0539 UL International Demko A/S UL DK cation - guidelines of Suffix denotes special condition of use Permissible surface temperature Conditions in Ex areas Gas and dust groups
X
0102 PTB PTB DE the European contained in the certificate.
Ignition
Union Temperature class Gas Typical Identification NEC Identification
temperature Explosive Presence of Equipment
0044 TÜV Nord TUN DE Suffix denotes Ex component ­approval. Zone gas / dust 505 NEC 500
atmo- explosive protection
U The equipment is not ­suitable for Ammonia 630°C classification
0080 INERIS INE FR
installation without further evaluation.
T1=450 T1=450 sphere atmosphere level
Methane l Mining
0344 DEKRA CERTIFICATIONS B.V. DEK NL T2=300 T2=300
Methane 595°C Continuous,
T2A=280 Propane ll A Class 1 / GP D
1180 BASEEFA BAS UK Zone 0 long periods, Ga
T2B=260 frequent
Hydrogen 560°C Gas Ethylene ll B Class 1 / GP C
T2C=230 Fog Zone 1 Occasional Gb

IECEx DEK 20.0062 X T2D=215 Propane 470°C Liquid Hydrogen ll B + H2 Class 1 / GP B

IECEx certificate number Normally not,
T3=200 T3=200 Zone 2 only for a short Gc Acetylene ll C Class 1 / GP A
T3A=180 Ethylene 425°C period
T3B=165 Fibers and flyings lll A Class lll
Continuous,
Butane 365°C
Zone 20 long periods, Da

ATEX / IECEx / UKEX Marking

T3C=160 Non-conductive dusts lll B Class ll / GP G
frequent
T4=135 T4=135 Acetylene 305°C
T4C=120 Dust Zone 21 Occasional Db Carbonaceous dusts lll B Class ll / GP F

T5=100 T5=100 Cyclohexane 259°C Normally not, Metal dusts lll C Class ll / GP E
Example marking
T6=85 T6=85 Zone 22 only for a short Dc

II 2 G Ex db IIC T4 Gb
* Diethyl ether 170°C period
Equipment marking
0344 ºC Carbon
95°C
disulfide
*Complies with UKCA requirements
Ex identification acc. to standard (example)
Conditions in potentially explosive areas ATEX 2014/34/EU Gas and dust groups
Associated
Dust temperature: apparatus. [ ]
Typical ANSI/ISA
EPL Identification Max. surface temperature is shown in full in the markings for dust, *RED text in markings above applies to US only. [AEx ia] IIC Transmits to or Associated
gas / dust 60079-0
e.g. T90°C. receives signal equipment
Explosive Presence of Zone Equipment
Equipment group from Ex area.
Atmosphere explosive atmoshere Classification category Methane I Note:
Equipment
US installations may use the zone or division marking scheme.
protection level Propane II A
New installations in Canada must use the zone marking ANSI/ISA Installation
scheme, while existing installations may use either scheme. AEx ia IIC T6 Equipment
Ethylene II B 60079-0 in Ex area.
I M1 Ma System 9000
Parts at coal mines endangered by Hydrogen II C
Coal Mines 9106B - AI HART transparent
firedamp and / or combustible dust
I M2 Mb Combustible flyings III A 9107B - AO HART transparent
9113B - AI temperature converter Protection types - Zone Scheme
Non-conducting dust III B 9116B - AI universal w/ limit switch
Continuous, long
Zone 0 II 1G, (1)G Ga 9202B - DI pulse isolator
periods, frequent Conducting dust III C Protection method Type Zones Hazard type Standard ISA / UL / CSA Concept
Gas 9203B - DO solenoid/alarm driver
Vapor Occasional Zone 1 II 2G, (2)G Gb General requirements All All 60079-0
Mist
Normally not, only for
Ex identification acc. to standard (example) ia
0, 1, 2 Gas
Zone 2 II 3G, (3)G Gc 20, 21, 22 Dust
a short period
Continuous, long EN / IEC Associated 1, 2 Gas
Zone 20 II 1D, (1)D Da [Ex ia Ga] IIC Intrinsic safety ib 60079-11 Limiting ignition energy
periods, frequent 60079-0 apparatus. [ ] 21, 22 Dust
Dust Transmits to or Associated
Fibers Occasional Zone 21 II 2D, (2)D Db receives signal equipment 2 Gas
EN / IEC ic
Flyings [Ex ia] IIC from Ex area.
60079-0 22 Dust
Normally not, only for
Zone 22 II 3D, (3)D Dc
a short period eb 1, 2 Gas
EN / IEC Increased safety 60079-7 Prevention of sparks
Ex ia IIC T6 Ga
60079-0 Installation ec 2 Gas
Continuous operation in Equipment
Use in the defined Ex area 1G category M1 in Ex area
explosive atmosphere EN / IEC da 0, 1, 2 Gas
Ex ia IIC T6 System 7900
60079-0
Associated apparatus. Transmits to No operation in 7908 - 8 module backplane Flameproof enclosures db 1, 2 Gas 60079-1
(1)G category M2 Propogation ­prevention
or receives signal from Ex area. explosive atmosphere 7916 - 16 module backplane
dc 2 Gas
Powder filling q 1, 2 Gas 60079-5
Restricted breathing nR 2 Gas 60079-15
Protection types (ATEX / IECEx / UKEx) System 7500
7501 - F
 ield mounted HART Sealed device nC 2 Gas 60079-15
Protection temperature transmitter pxb 1, 2 Gas
Type Zones Hazard type IEC / EN standard Concept
method
1, 2 Gas
pyb
General System 5300 / 5400 Pressurization 21, 22 Dust 60079-2
All All 60079-0
requirements 5331D - Universal temperature isolated
2 Gas
0, 1, 2 Gas 5332D - RTD - Pt100 / Lin. R, 4-wire pzc
ia 5333D - RTD - Pt100 / Lin. R, 3-wire 22 Dust
20, 21, 22 Dust 5334B - TC isolated
5335D - Universal temperature HART 5 pb 1, 2 Gas
1, 2 Gas
Intrinsic safety X ib 60079-11 Limiting ignition energy 5337D - Universal temperature HART 7 Pressurized room pc 2 Gas 60079-13
21, 22 Dust 5343B - Level - Lin. R / Potentiometer
5437D - 2
 -wire HART 7 temperature vc 2 Gas
2 Gas Prevents ingress
ic transmitter 0, 1, 2 Gas of explosive
22 Dust ma atmopshere
20, 21, 22 Dust
eb 1, 2 Gas
Increased safety X ec 2 Gas
60079-7 Prevention of sparks 1, 2 Gas
Encapsulation mb 60079-18
21, 22 Dust
Non-sparking nA 2 Gas EN 60079-15 No arcs, sparks or hot surfaces System 5000
5104B - AI repeater / power supply 2 Gas
da 0, 1, 2 Gas 5105B - AO isolated driver mc
Flameproof 5106B - AI HART transparent 22 Dust
db 1, 2 Gas 60079-1
enclosures 5114B - AI universal converter ob 1, 2 Gas
dc 2 Gas Propogation prevention 5115B - AI universal calculator Liquid immersion 60079-6
5116B - AI universal w/ limit switch oc 2 Gas
Powder filling q 1, 2 Gas 60079-5 5131B - AI universal converter LP ta 20, 21, 22 Dust
5202B - DI NAMUR/contact input
5203B - DO solenoid/alarm driver Protection by enclosure tb 21, 22 Dust 60079-31
Restricted breathing nR 2 Gas 60079-15
5223B - DI frequency converter tc 22 Dust
Sealed device nC 2 Gas 60079-15
1, 2 Gas Prevention of optical
pxb 1, 2 Gas op pr
21, 22 Dust energy release
1, 2 Gas
pyb 0, 1, 2 Gas Limiting optical
Pressurization 21, 22 Dust 60079-2 Optical radiation op is 60079-28
20, 21, 22 Dust energy
2 Gas
pzc 0, 1, 2 Gas Interlocked with ­optical
22 Dust op sh
20, 21, 22 Dust breakage
pb 1, 2 Gas
Pres­surized room
pc 2 Gas 60079-13 5531B 4-digit LCD
Artificially ventilated vc 2 Gas Ex loop-powered display Example Division scheme marking

Class I Division 1 Group A,B,C,D T6

Prevent ingress of ­explosive
0, 1, 2 Gas
ma atmopshere System 3000 (zone 2 only)
20, 21, 22 Dust 3101 - TC converter
1, 2 Gas 3102 - Pt100 converter Class division
Encap­sulation mb 60079-18 3103 - Isolated repeater (NEC500)
21, 22 Dust 3104 - Isolated converter
2 Gas
3108 - Isolated repeater / splitter Conditions in potentially explosive areas
mc 3109 - Isolated converter / splitter
22 Dust 3111 - TC converter - isolated
3112 - Pt100 converter - isolated Explosive
Class Division Group Eqv. Zone Presence of explosive atmosphere
ob 1, 2 Gas Atmosphere
Liquid immersion 60079-6 3113 - H
 ART 7 temperature converter -
oc 2 Gas isolated
Continuous, long periods, frequent
3114 - Isolated universal converter Gas 1 A, B, C, D 0 or 1
ta 20, 21, 22 Dust 3117 - Bipolar isolated converter Vapor Class I Occasional
Protection by enclosure tb 21, 22 Dust 60079-31 3118 - Bipolar isolated converter / splitter Liquid
2 A, B, C, D 2 Normally not, only for short periods
3185 - Loop powered isolator
tc 22 Dust 3186 - 2
 -wire transmitter isolator / current Continuous, long periods, frequent
isolator 1 E, F, G 20 or 21
1, 2 Gas Dust Class II Occasional
op pr Prevention of optical ­energy release 3202 - P
 ulse isolator / switch amplifier
21, 22 Dust 3225 - Universal frequency converter 2 F, G 22 Normally not, only for short periods
0, 1, 2 Gas 3331 - T
 emperature converter, loop-powered -
isolated Constant
Optical radiation op is 60079-28 Limiting optical energy 1 20 or 21
20, 21, 22 Dust 3333 - Pt100 converter, loop-powered Fibers Class III Occasional
3337 - H
 ART 7 temperature converter, loop-
0, 1, 2 Gas Interlocked with optical 2 22 Normally not, only for short periods
op sh powered
20, 21, 22 Dust breakage 3405 - Power connector unit

Environmental protection code / class Protection Types - Division system

IP protection codes (IEC 60529) NEMA types (NEMA 250) General
Gas Dust FM / UL (NEC 500) Canada (CEC) CSA
requirements
First numeral: Protection against solids Second numeral: Protection against water Type Application Protection against Equivalent ­guideline IP rating
Class II, Div 1
1 Indoor General purpose 10 Class I, Div 1
0 No protection 0 No protection Class II, Div 2 UL913 / FM3610
2 Indoor Dripping water, falling dust 11 Intrinsic safety IS C22.2 No.157
1 Greater than 50 mm 1 Vertical dripping Class III, Div 1 UL698
3, 3R, 3S Outdoor Rain, snow, windblown dust 54 Class I, Div 2
Class III, Div 2
2 Greater than 12.5 mm 2 Angled dripping (15˚) 4, 4X Indoor / outdoor Hose-directed water, corrosion (X) 55, 56
Explosion proof / Class I, Div 1 Class II, Div 1 UL1203
3 Greater than 2.5 mm 3 Spraying water 5 Indoor Angled dripping water, settling dust 52 XP C22.2 No.30
Dust ignition proof Class I, Div 2 Class II, Div 2 FM3615
6 Indoor /outdoor Temporary submersion 67
4 Greater than 1 mm 4 Splashing water Class II, Div 2
6P Indoor / outdoor Prolonged submersion 67
5 Dust protected 5 Water jets Non-incendive NI Class I, Div 2 Class III, Div 1
7 Indoor Hazardous Location Class I
Class III, Div 2
6 Dust tight 6 Powerful water jets 8 Indoor / outdoor Hazardous Location Class I
9 Indoor Hazardous Location Class II Type X Class I , Div 1 Class II, Div 1
7 Immersion up to 1 m Pressurized /
12, 12K Indoor Dripping non-corrosive liquid, dust 52 Type Y Class I, Div 1 Class II, Div 1 FM3620 C22.2 No, 60079-2
Purged
8 Immersion beyond 1 m 13 Indoor Water, oil, dust, seepage 54 Type Z Class I , Div 2 Class II, Div 2

www.prelectronics.com
1016UK (2418)