Equipment Certification Guide for Hazardous Areas
Comparison
ATEX and IEC Ex
North America
Division 2
Classification of Zones and Divisions
Zone 2
Type of Area
Zone 0
Zone 1
NEC
Continuous
hazard
Zone 0
CENELEC Classification
IEC Classification
ATEX Classification
US Classification
EN 60079Ǧ10
IEC 60 079Ǧ10
ATEX Directive 94/9/EC
ANSI/INFPA70 NEC Article 505
Division 1
ATEX and IEC
Definition
Zone 0 / Zone 20
explosive
atmosphere is
continually
present
Division 1
Division 1
Intermittent
hazard
Zone 1 / Zone 21
Division 1
nA
ia
ib
ic
ma
mb
mc
nC
nR
o
px
py
pz
q
OP sh
Op is
Op pr
Intrinsic Safety
Encapsulation
Sealed/Hermetic Sealing
Restricted Breathing
Oil Filled
Pressurised
Sand Filled
Optical Radiation
1, 2
II
2
0, 1, 2
1, 2
2
0, 1, 2
1, 2
2
2
2
1, 2
1, 2
1, 2
2
1, 2
0, 1, 2
0, 1, 2
1, 2
limit circuit energy
and hot surfaces
Exclude fuel
Quench the flame
Inherently safe
II
Gc
60079Ǧ7
Gb
60079Ǧ15
Gc
Ga
Gb
Gc
Ga
Gb
Gc
Gc
Gc
Gb
Gb
Gb
Gc
Gb
Ga
Ga
Gb
60079Ǧ11
60079Ǧ18
II
60079Ǧ15
60079Ǧ6
60079Ǧ2
II
II
60079Ǧ5
60079Ǧ28
Protection of Electrical Equipment for Combustible Dusts Ǧ D
ta
tb
tc
iaD
ibD
icD
ma
mb
mc
Enclosure
Intrinsic Safety
Encapsulation
General requirements
Exclude dusts by
use of enclosure
Use of enclosure
and energy
limitation
Exclude dust
20, 21, 22
21, 22
21, 22
20, 21, 22
21, 22
21, 22
20, 21, 22
21, 22
21, 22
III
III
Da
Db
Dc
Da
Db
Dc
Da
Db
Dc
60079Ǧ31
61241Ǧ11
60079Ǧ18
Covers application and testing related to above protection methods
Equipment intended for use in zone 1 areas cannot be used in Division 1 areas as this
covers zone 0 rated areas also.
Comparison of IP and NEMA Enclosure Ratings
Enclosure
Type
IP23
1
Ɣ
IP30
IP32
IP55
II
2
G
Ex
e
IIC
T4
4X
IP66
IP67
Ɣ
6
Ɣ
12
Ɣ
Ɣ
13
This comparison is for guidance only. It is the responsibility of the user to ensure the
enclosure rating is suitable for the given application.
Temperature Classification
Max Surface
Temperature
ATEX/IEC*
NEC 505
NEC 500
Max Surface
Temperature
450ºC
T1
T1
T1
450ºC
300ºC
T2
T2
T2
300ºC
T2A
280 ºC
T2B
260 ºC
T2C
230 ºC
T2D
215 ºC
T3
200ºC
T3A
180 ºC
T3B
165 ºC
T3C
160 ºC
T4
135ºC
Gb
Equipment Protection
Level
Temperature Class
Gas Group
Type of Protection
Explosion Protection
Environment*
Equipment Category*
Equipment Group*
Specific marking for
explosion protection*
Intrinsic Safety
Ɣ
Ɣ
4
200ºC
T3
AEx d
XP
AEx nC
AEx e
AEx nA
NI
AEx q
AEx ia
AEx ib
IS
AEx nC
AEx m
AEx ma
AEx mb
AEx o
Type X
Type Y
Type Z
AEx px
AEx px
AEx px
Limited Energy
Oil Filled
Ɣ
3
Typical ATEX and IEC Ex Equipment Marking
Ex
IP65
Flameproof
Explosion proof
Enclosed Break
Increased Safety
Non Sparking
Non Incendive
Sand Filled
Encapsulation
Ɣ
2
IP64
Protection of Electrical Equipment for Gases and Vapours – Class I
T3
135ºC
T4
T4
T4A
120 ºC
100ºC
T5
T5
T5
100ºC
85º
T6
T6
T6
85º
*For ATEX/IEC applications applies to Group II gases only. Group 1 applications have different classifications
For ATEX certified equipment, the CE mark should be shown, along with the relevant Notified Body number, where applicable.
*Required for ATEX only
Pressurised
Restricted
Breathing
Contain the
explosion
No arcs, sparks or
hot surfaces
Quench the flame
Limit circuit
energy and hot
surfaces
Exclude fuel
AEx nR
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Zone 1, 2
Division 1
Zone 2
Zone 1, 2
Zone 2
Division 2
Zone 1, 2
Zone 0, 1, 2
Zone 1, 2
Division 1
Zone 2
Zone 1, 2
Zone 0, 1, 2
Zone 1, 2
Zone 1, 2
Division 1
Division 1
Division 2
Zone 1
Zone 1
Zone 2
ISA 60079Ǧ1
UL1203
ISA 60079Ǧ15
ISA 60079Ǧ7
ISA 60079Ǧ15
ISA 12.12.01 / FM3611
ISA 60079Ǧ5
Class 1
Zone 2
ISA 60079Ǧ15
ISA 60079Ǧ11
UL913 / FM3610
ISA 60079Ǧ15
ISA 60079Ǧ18
ISA 60079Ǧ6
NFPA 496 / FM3620
ISA 60079Ǧ2
Protection of Electrical Equipment for Combustible Dust – Class II & III
Dust Ignition
Proof
Dust Protected
Protection by
Enclosure
DIP
NI
AEx tD
Encapsulation
Exclude
combustible dust
Division 1 & 2
UL1203
Class II
Class II
Division 2
Zone 2
ISA 12.12.01 / FM3611
ISA 60079Ǧ31
AEx maD
Zone 20, 21, 22
AEx mbD
AEx iaD
Zone 21, 22
Zone 20, 21, 22
Limit circuit
energy and hot
surfaces
AEX ibD
IS
IS
Intrinsic Safety
Class II
Class II
Class III
Zone 21, 22
Division 1
Division 1
ISA 61241Ǧ18
ISA 61241Ǧ11
UL 913 / FM3610
Typical NEC Equipment Marking
NEC 505
NEC 500
Class 1
Division 1
Group
A,B,C
T3
Class 1
Zone 1
AEx
d
IIC
T3
Temperature Class
Non Sparking
No arcs, sparks or
hotsurfaces.
Enclosure εIP54
60079Ǧ15
Applicable
Standard
Gas Group
e
Gb
Typical
Division / Zone
Class
Protection Concept
Increased Safety
II
2
60079Ǧ1
Basic concept of
protection
American Standard
nC
1,2
Code
Permitted Zone
Enclosed Break
Contain the
explosion
Zone 2 / Zone 22
Division 2
Type of
Protection
Permitted Class
d
Hazard under
abnormal
conditions
explosive
atmosphere is
unlikely to occur
but if it does, will
exist only for a
short period
Temperature Class
Typical
IEC EPL
Gas Group
IEC/EN
Standard
Permitted Division
Gas
Group
Permitted Class
Typical
Zone(s)
Protection of Electrical Equipment for Gases and Vapours Ǧ G
Flameproof
ANSI/INFPA70 NEC Article 500
Explosion Protection Concepts
Basic Concept of
Protection
Symbol
US Classification
explosive
atmosphere is
likely to occur in
normal operation
Explosion Protection Concepts
Type of Protection
Division 1
Ingress Protection Ratings (EN60529/IEC529)
First Numeral
Protection from Solid Bodies
0
No special protection
Second Numeral
Protection from Liquids
0
No special protection
1
Large foreign bodies, diam.
>50mm
2
0
No special protection
1
Water dripping/falling
vertically
1
Protected against 0.225J
impact
MediumǦsized foreign
bodies, diam. >12mm
2
Water dripping/falling at an
angle (up to 15º degrees from
the vertical)
2
Protected against 0.375J
impact
Small foreign bodies, diam.
>2.5mm
3
Spray water (any direction up
to 60º degrees from the
vertical)
3
4
Granular foreign bodies,
diam. >1mm
4
Spray/splashing water from all
directions, (limited ingress
permitted)
4
5
Dust protected; dust
deposits are permitted, but
their volume must not affect
the function of the unit.
5
Low pressure water jets from
all directions, (limited ingress
permitted)
5
Complete protection
6
3
6
7
8
About Abtech
Third Numeral*
Protection from Impact
High pressure jets from all
directions
Temporary immersion, 1m for
30 minutes
Permanent Immersion or
defined pressure**
Protected against 0.5J impact
Protected against 2.0J impact
Protected against 6.0J impact
Abtech is a leading manufacturer of enclosures, electrical
connection products, lighting and associated equipment.
Our product range consists of;
x Hazardous Area enclosures and junction boxes
manufactured from stainless and mild Steel, GRP and
dieǦcast aluminium.
x High voltage junction boxes up to 35kV.
x Cable glands and adaptors.
x The Ablux range of hazardous area lighting.
Contact us for further details…
NEMA Enclosure Type Ratings
Type
1
2
3
3R
3S
4
4X
5
6
6P
6
Protected against 20.0J
impact
www.abtech.eu
sales@abtech.eu
* Third numeral ‘impact’ is optional and need not be shown.
** Second numeral ‘8’ is defined as ‘submersion at a depth and length of time to be agreed between manufacturer and user’
12
12K
13
Area of Use
Description
Indoor
Indoor
Indoor/Outdoor
General Purpose
Drip Proof ǦProtection against falling water and dirt
Dust & Rain Tight –Protection against windblown dust, rain, and sleet &
damage from formation of ice
Rain Proof & Ice/Sleet Proof Ǧ protection against falling rain & damage from
formation of ice
Dust Tight, Rain Tight, & Ice/Sleet Proof – Protection against sleet and
damage from formation of ice
Water Tight & Dust Tight –
Water Tight, Dust Tight, & Corrosion Resistant Ǧ Protection from corrosion,
hose directed water and damage from formation of ice
Outdoor
Outdoor
Indoors/Outdoors
Indoors/Outdoors
Indoor
Indoors/Outdoors
Indoors/Outdoors
Indoor
Dust Tight & Drip Tight Ǧ protection against dust, fibres, falling dirt, and
dripping nonǦcorrosive liquids
Temporary Submersion – protection against falling dirt, dust, fibres, hose
directed water and temporary submersion in water.
Prolonged Submersion – protection against falling dirt, dust, fibres, hose
directed water and prolonged submersion in water.
Dust Tight & Drip Tight Ǧ protection against dust, fibres, falling dirt, and
dripping nonǦcorrosive liquids (enclosure without knockouts)
Indoor
Dust Tight & Drip Tight Ǧ protection against dust, fibres, falling dirt, and
dripping nonǦcorrosive liquids (enclosure with knockouts)
Indoor
Dust Tight & Oil Tight Ǧ protection against dust, spraying of water, oil, and
noncorrosive coolant.
Gas/Atmosphere Groups IEC Ex and ATEX
Group
Environment
I
Typical Location
Underground Mining
IIA
Gases
And
Vapours
IIB
Typical Gas/Substance
Underground Methane (Firedamp)
Above Ground
Ethylene, Hydrogen Sulphide
IIC
Hydrogen, Acetylene, Carbon Disulphide
IIIA
Combustible fibres & flyings
IIIB
Combustible
Dusts
Worldwide Sales and Service Network
Acetone, Methane, propane
Above Ground
IIIC
Combustible dusts – non conductive
Combustible dusts Ǧ conductive
Equipment
ATEX &
Ex
Equipment Categories/Levels
Categories/Levels of
of Protection
Protection ATEX
& IEC
IEC Ex
Equipment
Equipment
Category ATEX
Category ATEX
94/9/EC
94/9/EC
Category 1
Category 1
Category 2
Category 2
Category 3
Category 3
ABTHXǦ2011
Category
Category
Equipment Protection
Equipment Protection
Level
Level
1G
1G
1D
1D
2G
2G
2D
2D
3G
3G
3D
3D
Ga
Ga
Da
Da
Gb
Gb
Db
Db
Gc
Gc
Dc
Dc
North America
Europe
Asia
A.B Controls & Technology Inc.
1813 Rotary Drive
Humble
Texas
USA
TX77338
Tel:
+001 281 5483424
Fax:
+001 281 5483624
Email:
sales@abtechǦinc.net
Abtech Limited
Sanderson Street
Lower Don Valley
Sheffield,
South Yorkshire
S9 2UA
United Kingdom
Tel:
+44 (0) 114 244 2424
Fax:
+44 (0) 114 243 4312
Email:
sales@abtech.eu
Abtech S.E Asia Pte Ltd
7 International Business Park
#04Ǧ08
TechQuest Building
Singapore
609919
Tel:
+65 656 79020
Fax:
+65 656 70446
Email:
sales@abtechasia.com
Worldwide Agents
Abtech Scotland
46 Telford Road
Lenziemill
Cumbernauld
G67 2AX
Abtech Korea
Astar Apt #101Ǧ2801
DongǦRae Gu
OnǦChen Dong, Busan
South Korea
Tel:
+82 708807 2137
Fax:
+82 51553 2137
Email:
sales@abtechǦkorea.com
Located in the following countries;
Zone of Use
Zone of Use
Suitable for use in Zone 0, 1, 2
Suitable for use in Zone 0, 1, 2
Suitable for use in Zone 20, 21, 22
Suitable for use in Zone 20, 21, 22
Suitable for use in Zone 1, 2
Suitable for use in Zone 1, 2
Suitable for use in Zone 21, 22
Suitable for use in Zone 21, 22
Suitable for use in Zone 2
Suitable for use in Zone 2
Suitable for use in Zone 22
Suitable for use in Zone 22
Approvals
Belgium
Denmark
Finland
France
Italy
Russia
Sweden
Oman
Qatar
Saudi Arabia
UAE
Australia
China
Hong Kong
Indonesia
Malaysia
Taiwan
Thailand
Vietnam
Abtech GmBH
Dünner Kirchweg 11
32257, Bünde, Germany
Tel:
+49 (0) 522 375016
Fax:
+49 (0) 522 375019
Email:
sales@abtech.de
Abtech Nederland BV
Glasblazerstraat 1 2984 BL Ridderkerk,
Nederland
Tel:
+31 (0) 180 428417
Fax:
+31 (0) 180 431668
Email:
sales@abtech.nl