Global Reference Guide for Potentially Explosive Atmospheres and Hazardous Locations
94/9/EC Product Markings
Typical IEC/CENELEC Product Markings
ATEX Required Markings
II
2
GAS
G / D
Ex
de
Dust
IIC
T6
1)
Gb / Ex
t
IIIC
Db
Electrical Type of Protection for Atmospheres made explosive by gases, vapors and mists
Explosion Protection Marking
Type of Protection
d
e
ia
ib
ic
Equipment Group
Equipment Category
Explosive Atmosphere Suitability
(G – Gas, vapor or mist)
ATEX / IEC Reference
Method of Explosion Protection
1)
T80°C
Explosive Atmosphere Suitability
(D – Dust)
Explosion Marking
Type of protection (Gas)
Explosion Group (Gas)
Temperature Class (Gas)
ma
mb
mc
nA
nC
nR
o
op is,
op pr, op sh
px, py
pz
q
Type of Protection
Zone
General Requirements
Flameproof Enclosure
Zone 1 or 2
Increased Safety
Zone 1 or 2
Intrinsic Safety
Zone 0, 1 or 2
Intrinsic Safety
Zone 1 or 2
Intrinsic Safety
Zone 2
Intrinsically Safe Systems
Zone 1 or 2
Intrinsically Safe Fieldbus Systems (FISCO) Zone 1 or 2
Non-sparking Fieldbus Systems (FNICO) Zone 1 or 2
Encapsulation
Zone 0, 1 or 2
Encapsulation
Zone 1 or 2
Encapsulation
Zone 2
Non-Sparking
Zone 2
Enclosed Break
Zone 2
Restricted Breathing
Zone 2
Oil Immersion
Zone 1 or 2
Optical Radiation
Zone 0, 1 or 2
Optical Radiation
Zone 1 or 2
Pressurized Enclosure
Zone 1 or 2
Pressurized Enclosure
Zone 2
Powder Filling
Zone 1 or 2
Type of Protection
ia
ib
ma
mb
mc
p
t
Description of Protection
General Requirements
Intrinsic Safety
Intrinsic Safety
Encapsulation
Encapsulation
Encapsulation
Pressurized
Protection by enclosure
/ ATEX Category/ EPL
CENELEC /IEC Standard
EN 60079-0 / IEC 60079-0
/2G
/ Gb
EN 60079-1 / IEC 60079-1
/2G
/ Gb
EN 60079-7 / IEC 60079-7
/ 1G
/ Ga
EN 60079-11 / IEC 60079-11
/2G
/ Gb
EN 60079-11 / IEC 60079-11
/3G
/ Gc
EN 60079-11 / IEC 60079-11
/2G
/ Gb
EN 60079-25 / IEC 60079-25
/2G
/ Gb
EN 60079-27 / IEC 60079-27
/3G
/ Gc
EN 60079-27 / IEC 60079-27
/1G
/ Ga
EN 60079-18 / IEC 60079-18
/2G
/ Gb
EN 60079-18 / IEC 60079-18
/3G
/ Gc
EN 60079-18 / IEC 60079-18
/3G
/ Gc
EN 60079-15 / IEC 60079-15
/3G
/ Gc
EN 60079-15 / IEC 60079-15
/3G
/ Gc
EN 60079-15 / IEC 60079-15
/2G
/ Gb
EN 60079-6 / IEC 60079-6
/ 1 G, 2 G or 3 G / Ga, Gb, Gc EN 60079-28 / IEC 60079-28
/ 2 G or 3 G
/ Gb, Gc
EN 60079-28 / IEC 60079-28
/2G
/ Gb
EN 60079-2 / IEC 60079-2
/3G
/ Gc
EN 60079-2 / IEC 60079-2
/2G
/ Gb
EN 60079-5 / IEC 60079-5
Protection Concept
Contain the explosion, prevent the flame propagation
No arcs, sparks or hot surfaces
Limit the energy of the spark and the surface temperature
Limit the energy of the spark and the surface temperature
Limit the energy of the spark and the surface temperature
Limit the energy of the spark and the surface temperature
Limit the energy of the spark and the surface temperature
Limit the energy of the spark and the surface temperature
Exclusion of Ex-atmosphere
Exclusion of Ex-atmosphere
Exclusion of Ex-atmosphere
No arcs, sparks or hot surfaces
Prevent the flame propagation
Protection by enclosure
Exclusion of Ex-atmosphere
Limit or prevent energy transmission from optical radiation
Limit or prevent energy transmission from optical radiation
Exclusion of Ex-atmosphere
Exclusion of Ex-atmosphere
Prevent the flame propagation
Equipment Protection Level (EPL-Gas)
Electrical Type of protection for Atmospheres made explosive by dusts
Explosion Protection Marking
Type of protection (Dust)
Explosion Group (Dust)
Max. Surface Temperature (Dust)
ATEX Zone
Zone 20, 21, 22
Zone 21, 22
Zone 20, 21, 22
Zone 21 or 22
Zone 20, 21, 22
Zone 22
Zone 20, 21, 22
/ ATEX Category/ EPL
CENELEC /IEC Standard
EN 60079-0 / IEC 60079-0
/1D
/ Da
EN 61241-11 / IEC 61241-11
/2D
/ Db
EN 61241-11 / IEC 61241-11
/1D
/ Da
EN 60079-18 / IEC 60079-18
/2D
/ Db
EN 60079-18 / IEC 60079-18
/1D
/ Da
EN 60079-18 / IEC 60079-18
/3D
/ Dc
EN 61241-4 / IEC 61241-4
/ 1 D, 2 D or 3 D / Da, Db, Dc EN 60079-31 / IEC 60079-31
Protection Concept
Limit the surface temperature
Limit the surface temperature
Exclusion of Ex-atmosphere
Exclusion of Ex-atmosphere
Exclusion of Ex-atmosphere
Exclusion of Ex-atmosphere
Keep the combustible dust out and avoid hot surfaces
Equipment Protection Level (EPL-Dust)
1) Standard marking - alternate marking possible e.g.: Ex db eb IIC T6 / Ex tb IIIC T80°C
ATEX (Atmosphères Explosibles) - The Directive 94/9/EC (ATEX) regulates within its scope for the European Market the Essential Health and Safety Requirements for apparatus for use in hazardous areas and conformity assessment procedures which must be applied to equipment.
Zone Classification / Equipment Protection Level
Hazardous
mixture
Gas
Mist
Vapor
Dust
Period of presence
of the flammable
substances
Zone
Classification
Continuously for long
Zone 0
periods or frequently
Occasional occurrence
Zone 1
Not likely, but if it does occur
only rarely and for a short period Zone 2
Continuously for long
Zone 20
periods or frequently
Occasional occurrence
Zone 21
Not likely, but if it does occur
only rarely and for a short period Zone 22
Methane
Coal dust
Mining
Mining
Necessary Marking for the Equipment
According 94/9/EC
According IEC 60079-0
Equipment Category
Protection
Equipment
Group
Group
Protection
Level EPL
II
1G
II
Ga
Typical Nameplate Marking
Explosion Groups
Protection
Level
very high
II
2G
II
Gb
high
II
3G
II
Gc
increased
III
1D
III
Da
very high
III
2D
III
Db
high
III
3D
III
Dc
increased
I
I
M1
M2
I
I
Ma
Mb
very high
high
Explosive
Atmospheres:
Typical
Hazardous Material
Explosion Group
Gases and
Vapors
Acetylene
Hydrogen
Ethylene
Propane
IIC
IIC or IIB+H2
IIB
IIA
Metal dust
Coal dust
Grain dust
IIIC
IIIC
IIIB
Wood, paper,
or cotton processing
IIIA
Dusts
Fibres
& Flyings
SECOND NUMERAL
Protection against liquid
0 - NO PROTECTION
0 - NO PROTECTION
1- OBJECTS EQUAL TO
OR GREATER THAN 50 mm
1 - VERTICALLY DRIPPING WATER
2 - 75 TO 105°-ANGLED DRIPPING WATER
3 - SPRAYING WATER
4 - SPLASHING WATER
3 - OBJECTS EQUAL TO
OR GREATER THAN 2.5 mm
5 - WATER JETS
4 - OBJECTS EQUAL TO
OR GREATER THAN 1.0 mm
6 - HEAVY SEAS, POWERFUL WATER JETS
IP56
5 - DUST-PROTECTED
7 - EFFECTS OF IMMERSION
6 - DUST-TIGHT
8 - INDEFINITE IMMERSION
eLLK 2010XYZ
Certificate number
May end with U – Component cert.
May end with X – Special conditions
for safe use
www.ceag.de Made in Germany
S.Nr.: D123456
Additional certificate (optional)
Explosion protection marking (ATEX):
Equipment Group (II) and Category (2)
Type of explosive atmosphere
G – gas, vapor or mist / D – dust
0102
2010
PTB 09 ATEX 12345
110 - 240 V 50 - 60 Hz
IECEx BVS 09.12345
110 - 240 V DC
II 2 G Ex de IIC T6 Gb
II 2 D Ex t IIIC T80°C Db
Ta= -25°C - +55°C
Lamp: G13 60081 IEC
CE marking and number of
Notified Body responsible for the
monitoring of the Quality System
(0102 = PTB Germany)
Electrical parameters
Ambient temperature
-25°C to +55°C
(if -20°C to + 40°C, marking is
not required - Standard for all
equipment)
Other essential information
required by the used Standards
Localisation of Gas and Dust Ex-Zones
NEMA Enclosure Types
FIRST NUMERAL
Protection against solid bodies
2 - OBJECTS EQUAL TO
OR GREATER THAN 12.5 mm
Equipment name/type
Serial number including year of
manufacture
Marking accd. IEC/CENELEC
Ingress Protection (IP) Codes and NEMA Enclosure Types
Ingress Protection Codes IP .. according IEC 60079
Name and address of manufacturer
Enclosure
Type
Intended Use
1
3
3R
3S
4
4X
5
6
6P
7**
8**
9**
10**
12
12K
13
Indoor use, limited amounts of falling dirt
Outdoor use, rain, sleet, windblown dust, external formation of ice
Outdoor use, rain, sleet, external formation of ice
Outdoor use, rain, sleet, windblown dust, external mechanisms operable when ice laden
Indoor or outdoor use, windblown dust and rain, splashing water, hose directed water, external formation of ice
Indoor or outdoor use, windblown dust and rain, splashing water, hose directed water, corrosion, external formation of ice
Indoor use, settling airborne dust, falling dirt, non-corrosive liquids
Indoor or outdoor use, hose directed water, temporary submersion, external formation of ice
Indoor or outdoor use, hose directed water, prolonged submersion, external formation of ice
Indoor use, Class I, Division 1, Groups A, B, C, and D hazardous locations, air-break equipment
Indoor or outdoor use, Class I, Division 1 Groups A, B, C, and D hazardous locations, oil-immersed equipment
Indoor use, Class II, Division 1, Groups E, F, and G hazardous locations, air-break equipment
Mining applications
Indoor use, circulating dust, falling dirt, dripping noncorrosive liquids
Indoor use, circulating dust, falling dirt, dripping noncorrosive liquids, provided with knockouts
Indoor use, lint, dust, spraying of water, oil and noncorrosive coolant
Temperature Classification
Maximum Surface
Temperature
Equivalent
IP Rating*
Zone 21
Zone
Zone11
Zone 20
Zone
Zone00
Tank
Tank
54
54
54
NEC 500 Table 500.8(C)
Zone 22
Zone
Zone22
20
55
54
55
56
56
53
67
68
IEC
NEC® 505
Flammable
brennbare
liquid
Flüssigkeit
brennbarer
Staub
Flammable Dust
450ºC (842ºF)
300ºC (572ºF)
280ºC (536ºF)
260ºC (500ºF)
230ºC (446ºF)
215ºC (419ºF)
200ºC (392ºF)
180ºC (356ºF)
165ºC (329ºF)
160ºC (320ºF)
135ºC (275ºF)
120ºC (248ºF)
100ºC (212ºF)
85ºC (185ºF)
T1
T2
T3
T4
T5
T6
T1
T2
T2A
T2B
T2C
T2D
T3
T3A
T3B
T3C
T4
T4A
T5
T6
* NEMA Enclosure Type can be converted to IP Code rating, but IP Codes cannot be converted to NEMA Enclosure Type (Ref. NEMA 250)
** Enclosure Types for U.S. only (Ref. NEMA 250)
Typical NEC/CEC Product Markings
NEC 500
NEC 505/ CEC 18
Class I Division 1 Groups A, B, C & D T6
Class I Zone 1 AEx e IIC T6
Hazard Category
Method of Explosion Protection
Type of
Protection
Description
of Protection
Permitted for use in
Protection
United States
Canada
Concept
NEC 500 NEC 505 CEC 18 CEC 18
Division Zone
Division Zone
e
n
Increased Safety
Non-Incendive
2
NEC / CEC Reference
Area Classification
Hazardous Atmosphere Category
(Gas or Dust Grouping)
1, 2
2
2
1, 2
2
No arcs, sparks
or hot surfaces
Temperature Classification
Hazard Category
Area Classification
Explosion Protection Standard
(EX-IEC/ATEX/CEC, AEx-NEC)
Method of Explosion Protection
d
q
Flameproof
Explosionproof
Powder Filled
1, 2
-
1, 2
1, 2
1, 2
-
1, 2
1, 2
ia
ib
Intrinsic Safety
Intrinsic Safety
1, 2
-
0, 1, 2
1, 2
1, 2
-
0, 1, 2 Limit the energy of
1, 2 the spark and the
surface temperature
p
Pressurized
(Purged)
Encapsulation
Oil Immersion
1, 2
2
1, 2
1, 2
1, 2
1, 2
2
1, 2
1, 2
1, 2
m
o
Hazardous Atmosphere Category
(Gas or Dust Grouping)
Contain the explosion,
prevent the flame
propagation
Keep the flammable
gas out
CENELEC (European Committee for Electro-technical Standardization) publishes standards covering the electrotechnical field for countries in
Europe.
INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC) global organization that prepares and
publishes international standards for electrical,
electronic and related technologies.
NEMA (National Electrical Manufacturers
Association) NEMA 250 series standards for enclosure types covers both hazardous areas (potentially explosive atmospheres) and non-hazardous
areas.
NEC – National Electrical Code (USA)
CEC – Canadian Electrical Code (Canada)
Temperature Classification
Hazardous Atmosphere Category (Gas or Dust Grouping)
Explosive
Atmosphere
Typical
Hazard Material
North America NEC 500-503 / CEC 18
Hazard Category
Grouping
NEC 505*/CEC 18
Gas Grouping
Gases and
Vapors
Acetylene
Hydrogen
Ethylene
Propane
Class I
Class I
Class I
Class I
Group A
Group B
Group C
Group D
IIC
IIC or IIB+H2
IIB
IIA
Dusts
Metal dust
Coal dust
Grain dust
Class II
Class II
Class II
Group E
Group F
Group G
-
Fibres
& Flyings
Wood, paper,
Class III
or cotton processing
-
-
Area Classification
North America/
NEC 500-503/CEC 18
NEC 505-506/CEC 18
Continuous
Hazard
Intermittent
Hazard
Hazard under
Abnormal Conditions
Division 1
Division 1
Division 2
Zone 0
(Zone 20 dust)
Zone 1
(Zone 21 dust)
Zone 2
(Zone 22 dust)
* NEC 505 covers explosive gases and vapors only.
Cooper Crouse-Hinds GmbH
Neuer Weg-Nord 49
D-69412 Eberbach/Germany
Phone:
+49 6271 806-500
Fax:
+49 6271 806 476
E-mail
sales.CCH.de@cooperindustries.com
For more information visit: www.ceag.de
www.crouse-hinds.com
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