HAZARDOUS (Classified) LOCATIONS GUIDE for NORTH AMERICA
Typical Equipment Marking for Divisions
Enclosure Ingress Rating Comparisons
Class
Division
Gas/Dust Groups
Temperature Class
Enclosure Type Rating
Class I
Div 1
Gas Groups A, B, C, D
T4
Type 4X
Class II
Div 2
Dust Groups E*, F, G
T135C
——
North America Enclosure Type
Ratings
IEC 60529 Degree of Protection
(IP)
2014/34/EU (ATEX)
IEC
NEC 500/505/506
Type 1
IP20
Group I (mining)
Group I (mining)
n/a
Type 2
IP22
Group II (surface)
Group II
(surface, gas)
Class I
(gas + vapour)
Type 3, 3X, 3S, 3SX
IP55
Type 4, 4X
IP66
“
Type 5
IP53
Group III
(surface, dust)
Class II (dust)
——
Class III
Type 6
IP67
Type 6P
IP68
Type 12, 12K
IP54
Type 13
IP54
*Group E Dust automatically indicates Division 1
Typical Equipment Marking for Zones
Zone
Standard: Ex (Canada) / AEx (US)
Type of Protection
Equipment Group
Temperature Class
Zone 21
AEx
tb
IIC
T4
Protection Concept Comparisons
Europe/IEC
North American Zones
North American Divisions
(not exclusive)
Flameproof (db)
EN/IEC 60079-1
Flameproof
UL/C22.2 60079-1
Explosion proof
UL1203 / FM 3615 / C22.2 No.30
Intrinsic Safety (ia, ib)
EN/IEC 60079-11
Intrinsic Safety
UL/C22.2 60079-11
Intrinsic Safety
UL913 / FM 3610 / C22.2 No. 60079-11
Purged + Pressurised
EN/IEC 60079-2
Purged + Pressurised
UL/C22.2 60079-2
Purged + Pressurised
NFPA 496 / FM 3620 / ISA 12.04.01
Increased Safety (eb)
EN/IEC 60079-7
Increased Safety
UL/C22.2 60079-7
Increased Safety
ISA 12.12.01 / C22.2 No.213
Encapsulation (ma, mb)
EN/IEC 60079-18
Encapsulation
UL/C22.2 60079-18
Encapsulation
ISA 12.12.01 / C22.2 No.213
Powder Filling (qb)
EN/IEC 60079-5
Powder Fillings
UL/C22.2 60079-5
——
Oil Filled (ob)
EN/IEC 60079-6
Oil Filled
UL/C22.2 60079-6
——
Flameproof (dc)
EN/IEC 60079-1
Flameproof
UL/C22.2 60079-1
Enclosed Break
ISA 12.12.01 / C22.2 No.213
Hermetically Sealed (nC)
EN/IEC 60079-15
Hermetically Sealed
UL/C22.2 60079-15
Non-incendive
UL 12.12.01 / C22.2 No.213
Non-incendive (nC)
EN/IEC 60079-15
Non-incendive
UL/C22.2 60079-15
Non-incendive
UL 12.12.01 / C22.2 No.213
Non-sparking (nA)
EN/IEC 60079-15
Non-sparking
UL/C22.2 60079-15
Non-incendive
UL 12.12.01 / C22.2 No.213
Oil Filled (oc)
EN/IEC 60079-6
Oil Filled
UL/C22.2 60079-6
Restricted Breathing
EN/IEC 60079-15
Restricted Breathing
UL/C22.2 60079-15
——
Optical Radiation (op is)
EN/IEC 60079-28
Optical Radiation
UL/C22.2 60079-28
——
Trace Heating
EN/IEC/IEEE 60079-30-1
Trace Heating
IEC/IEEE 60079-30-1
Trace Heating
IEC/IEEE (515) 60079-30-1 / C22.2 60079-30-1
Process Sealing
EN/IEC 60079-40
Process Sealing
UL/C22.2 60079-40
——
Special Protection (s)
EN/IEC 60079-33
——
——
Flame Arrester
EN/ISO 16852
Flame Arrester
UL 525
——
Diesel Engines
EN1834 (Part 41)
Diesel Engines
UL 122001
——
Caplights
EN/IEC 60079-35
Caplights
C22.2 60079-35
——
Dust Protection by Enclosure
EN/IEC 60079-31
Dust Protection by Enclosure
UL/C22.2 60079-31
Dust Protection by Enclosure
UL 1203/3611/3616 / ISA 12.12.01 / C22.2 No.25
Non-electrical
EN/IEC 80079-36/37
Hazardous (Classified) Locations Guide for North America v1.1 OTC 2022
Eurofins E&E NA Hazloc Poster v1.1 with address to print for OTC ONLY.indd 1
Temperature Class Comparisons
(Gas & Vapours)
NEC/CEC Divisions
IEC / 2014/34/EU
NEC/CEC Zones
Temperature
T1
T1
≤450°C
T2
T2
≤300°C
T2A
“
≤280°C
T2B
“
≤260°C
T2C
“
≤230°C
T2D
“
≤215°C
T3
T3
≤200°C
T3A
“
≤180°C
T3B
“
≤165°C
T3C
“
≤160°C
T4
T4
≤135°C
T4A
“
≤120°C
T5
T5
≤100°C
T6
T6
≤85°C
Note: This is a general comparison, where the type rating exceeds
the equivalent IP rating. Type and IP rating are generally not
interchangeable due to the differences in testing.
Dust Group Comparisons
2014/34/EU
(ATEX)
IEC & NEC/CEC
Zones
IIIC
IIIC
IIIB
IIIB
IIIA
IIIA
NEC/CEC
(ignitable
fibres &
flyings)
NEC/CEC
(combustible
dusts)
E
n/a
F
——
G
n/a
n/a
Class III
Gas Group Comparisons
2014/34/EU (ATEX)
IEC & NEC/CEC Zones
NEC/CEC Divisions
IIC
IIC
A/B
IIB
IIB
C
IIA
IIA
D
——
——
Equipment Groups
Category / Zones / Division Comparisons
2014/34/EU ATEX
Category
IEC Zones
Equipment Protection Level
(EPL)
NEC/CEC Divisions
NEC/CEC Zones
1G
Zone 0
Ga
Class I / Division 1
Class I / Zone 0
2G
Zone 1
Gb
Class I / Division 2
Class I / Zone 1
3G
Zone 2
Gc
Class I / Division 2
Class I / Zone 2
1D
Zone 20
Da
Class II / Division 1
——
Class III / Division 1
Class II / Zone 20
2D
Zone 21
Db
Class II / Division 2
——
Class III / Division 2
Class II / Zone 21
3D
Zone 22
Dc
Class II / Division 2
——
Class III / Division 2
Class II / Zone 22
——
Eurofins E&E North America (Austin)
13501 McCallen Pas
TX 78753
Austin
Eurofins E&E CML
New Port Road
Ellesmere Port,
CH65 4LZ, UK
+1 512.287.2500
info@metlabs.com
www.metlabs.com
+44 151 559 1160
sales@cmlex.com
www.eurofins.co.uk/cml
12/04/2022 09:51:26