EATON · CROUSE-HINDS SERIES · CEAG

Global Reference Guide on the Marking of Electrical Equipment for Use in Explosive Atmospheres

ATEX (EU) / IECEx / UKCA and NEC / CEC (North America): how to read Ex marking, zones, gas and dust groups, temperature classes, types of protection, IP and NEMA ratings – from the Eaton wall chart, presented by VTL TECH, Eaton Crouse-Hinds distributor in Vietnam.

ATEX / IECEx / UKCA NEC / CEC Ask about explosion-proof equipment Download the original chart (PDF)

Part 1 – Marking according to ATEX (EU) / IECEx / UKCA

Information relating to explosive gas atmospheresInformation relating to explosive dust atmospheresInformation relating to mines endangered by firedampInformation relating to all areas

Typical marking – explosive gas atmospheres

Directive 2014/34/EU · IEC/EN 60079 seriesCE 0158 ⟨Ex⟩ II 2 G Ex db eb IIC T4 Gb

UK Regulations 2016 No 1107 (UKCA)UKCA 8505 ⟨Ex⟩ II 2 G Ex db eb IIC T4 Gb

CE / UKCA marking and number of the notified body (0158 = DEKRA EXAM GmbH; 8505 = DEKRA UK) – not for category 3Ex ⬡Explosion protection symbolIIEquipment group – hazardous areas other than mines susceptible to firedamp2Equipment category (category 2)GExplosive atmosphere: gas, vapour or mistExExplosion protection markingdbType of protection: flameproof enclosure, level “db”ebType of protection: increased safety, level “eb”IICEquipment group II, subgroup IIC (typical gas: hydrogen)T4Temperature class (max. surface temperature 135 °C)GbEquipment protection level EPL Gb – high protection level

Typical marking – explosive dust atmospheres

Directive 2014/34/EU · IEC/EN 60079 seriesCE 0158 ⟨Ex⟩ II 2 D Ex tb IIIC T80 °C Db

UK Regulations 2016 No 1107 (UKCA)UKCA 8505 ⟨Ex⟩ II 2 D Ex tb IIIC T80 °C Db

IIEquipment group – hazardous areas other than mines susceptible to firedamp2Equipment category (category 2)DExplosive atmosphere: dusttbType of protection: protection by enclosure “tb”IIICEquipment group III, subgroup IIIC (conductive dust)T80 °CSurface temperature max. 80 °CDbEquipment protection level EPL Db – high protection level

Example of classification of explosive gas atmospheres into zones (IEC/EN 60079-10-1)

Zone 0, 1 and 2 around a tank of combustible liquid

Zone 0 inside the tank; Zone 1 around openings; Zone 2 surrounding the area.

Example of classification of explosive dust atmospheres into zones (IEC/EN 60079-10-2)

Zone 20 inside the hopper; Zone 21 around the filling opening; Zone 22 surrounding area.

Explosion group

Explosive atmosphere	Typical combustible material	Group
Gas, vapour or mist	Acetylene	IIC
	Hydrogen	IIC / IIB+H2
	Ethylene/Formaldehyde	IIB
	Methane/Octane	IIA
Dust – conductive	Metal dust, coal dust	IIIC
Dust – non-conductive	Grain dust	IIIB
Fibres & Flyings	Wood, paper or cotton processing	IIIA

Temperature class

Temperature class (IEC/EN 60079-0)	Maximum surface temperature
T1	450 °C
T2	300 °C
T3	200 °C
T4	135 °C
T5	100 °C
T6	85 °C

IP degree of protection to IEC 60529

First digit – solid foreign objects		Second digit – ingress of water
0	No protection	0	No protection
1	≥ 50 mm diameter	1	Vertically dripping water
2	≥ 12 mm diameter	2	15° angled dripping water
3	≥ 2.5 mm diameter	3	Spraying water
4	≥ 1.0 mm diameter	4	Splashing water
5	Dust protected	5	Water jets
6	Dust tight	6	Strong water jets
		7	Temporary submersion
		8	Permanent submersion
		9	High pressure, high temperature spray downs

Electrical types of protection for explosive atmospheres due to flammable gases, vapours and mists

Type	Protection level	Type of protection	Group	Equipment category	EPL	CENELEC / IEC standard	Protection concept
d	da	Flameproof enclosure	II	1 G	Ga	EN/IEC 60079-1	Explosion containment, prevention of flame transmission
d	db	Flameproof enclosure	II	2 G	Gb	EN/IEC 60079-1	Explosion containment, prevention of flame transmission
d	dc	Flameproof enclosure	II	3 G	Gc	EN/IEC 60079-1	Explosion containment, prevention of flame transmission
p	pxb, pyb	Pressurized enclosure	II	2 G	Gb	EN/IEC 60079-2	Exclusion of Ex-atmosphere
p	pzc	Pressurized enclosure	II	3 G	Gc	EN/IEC 60079-2	Exclusion of Ex-atmosphere
q	–	Powder filling	II	2 G	Gb	EN/IEC 60079-5	Prevention of explosion diffusion
o	ob	Liquid immersion	II	2 G	Gb	EN/IEC 60079-6	Exclusion of Ex-atmosphere
o	oc	Liquid immersion	II	3 G	Gc	EN/IEC 60079-6	Exclusion of Ex-atmosphere
e	eb	Increased safety	II	2 G	Gb	EN/IEC 60079-7	No arcs, sparks or hot surfaces
e	ec	Increased safety	II	3 G	Gc	EN/IEC 60079-7	No arcs, sparks or hot surfaces
i	ia	Intrinsic safety	II	1 G	Ga	EN/IEC 60079-11	Limitation of spark energy and surface temperature
i	ib	Intrinsic safety	II	2 G	Gb	EN/IEC 60079-11	Limitation of spark energy and surface temperature
i	ic	Intrinsic safety	II	3 G	Gc	EN/IEC 60079-11	Limitation of spark energy and surface temperature
p/v	–	Pressurized enclosure/ ventilation	II	2 G	Gb	EN/IEC 60079-13	Exclusion of Ex-atmosphere / dilution
nA	–	Non-sparking equipment	II	3 G	Gc	EN/IEC 60079-15	No arcs, sparks or hot surfaces
nC	–	Enclosed equipment	II	3 G	Gc	EN/IEC 60079-15	Explosion containment, prevention of flame transmission
nR	–	Restricted breathing enclosure	II	3 G	Gc	EN/IEC 60079-15	Exclusion of Ex-atmosphere for a limited period
m	ma	Encapsulation	II	1 G	Ga	EN/IEC 60079-18	Exclusion of Ex-atmosphere
m	mb	Encapsulation	II	2 G	Gb	EN/IEC 60079-18	Exclusion of Ex-atmosphere
m	mc	Encapsulation	II	3 G	Gc	EN/IEC 60079-18	Exclusion of Ex-atmosphere
i	–	Intrinsic system	II	2 G	Gb	EN/IEC 60079-25	Limitation of spark energy and surface temperature
–	–	Equipment with protection level (EPL) Ga	II	1 G · 1 G/2 G	Ga · Ga/Gb	EN/IEC 60079-26	Double protection concept
op is	–	Inherent safe optical radiation	II	1 G	Ga	EN/IEC 60079-28	Limitation of radiation energy
op is	–	Inherent safe optical radiation	II	2 G	Gb	EN/IEC 60079-28	Limitation of radiation energy
op is	–	Inherent safe optical radiation	II	3 G	Gc	EN/IEC 60079-28	Limitation of radiation energy
op pr · op sh	–	Safe/interlocked optical radiation	II	2 G	Gb	EN/IEC 60079-28	Limitation or containment of radiation energy
op pr · op sh	–	Safe/interlocked optical radiation	II	3 G	Gc	EN/IEC 60079-28	Limitation or containment of radiation energy
s	sa	Special protection	n.a.	n.a.	Ga	IEC 60079-33	Special measures
s	sb	Special protection	n.a.	n.a.	Gb	IEC 60079-33	Special measures
s	sc	Special protection	n.a.	n.a.	Gc	IEC 60079-33	Special measures

Electrical types of protection for explosive atmospheres due to combustible dust

Type	Protection level	Type of protection	Group (Directive)	Group (Standard)	Equipment category	EPL	CENELEC / IEC standard	Protection concept
p	pxb	Pressurized enclosure	II	III	2 D	Db	EN/IEC 60079-2	Exclusion of Ex-atmosphere
p	pzc	Pressurized enclosure	II	III	3 D	Dc	EN/IEC 60079-2	Exclusion of Ex-atmosphere
i	ia	Intrinsic safety	II	III	1 D	Da	EN/IEC 60079-11	Limitation of spark energy and surface temperature
i	ib	Intrinsic safety	II	III	2 D	Db	EN/IEC 60079-11	Limitation of spark energy and surface temperature
i	ic	Intrinsic safety	II	III	3 D	Dc	EN/IEC 60079-11	Limitation of spark energy and surface temperature
m	ma	Encapsulation	II	III	1 D	Da	EN/IEC 60079-18	Exclusion of Ex-atmosphere
m	mb	Encapsulation	II	III	2 D	Db	EN/IEC 60079-18	Exclusion of Ex-atmosphere
m	mc	Encapsulation	II	III	3 D	Dc	EN/IEC 60079-18	Exclusion of Ex-atmosphere
op is	–	Inherent safe optical radiation	II	III	1 D	Da	EN/IEC 60079-28	Limit of radiation energy
op is	–	Inherent safe optical radiation	II	III	2 D	Db	EN/IEC 60079-28	Limit of radiation energy
op is	–	Inherent safe optical radiation	II	III	3 D	Dc	EN/IEC 60079-28	Limit of radiation energy
op pr · op sh	–	Safe/interlocked optical radiation	II	III	2 D	Db	EN/IEC 60079-28	Limitation or containment of radiation energy
op pr · op sh	–	Safe/interlocked optical radiation	II	III	3 D	Dc	EN/IEC 60079-28	Limitation or containment of radiation energy
t	ta	Protection by enclosure	II	III	1 D	Da	EN/IEC 60079-31	Exclusion of dust
t	tb	Protection by enclosure	II	III	2 D	Db	EN/IEC 60079-31	Exclusion of dust
t	tc	Protection by enclosure	II	III	3 D	Dc	EN/IEC 60079-31	Exclusion of dust
s	sa	Special protection	–	III	n.a.	Da	IEC 60079-33	Special measures
s	sb	Special protection	–	III	n.a.	Db	IEC 60079-33	Special measures
s	sc	Special protection	–	III	n.a.	Dc	IEC 60079-33	Special measures

Zone classification / Equipment protection level

Substance	Period of presence of the combustible substances	Zone	Equipment group (Directive 2014/34/EU)	Equipment category	Group (IEC/EN 60079-0)	EPL	Protection level
Gas, mist, vapour	Continuously for long periods or frequently	Zone 0	II	1 G	II	Ga	very high
	Occasional occurrence	Zone 1	II	2 G	II	Gb	high
	Not likely, but if it occurs only rarely and for a short period	Zone 2	II	3 G	II	Gc	enhanced
Dust	Continuously for long periods or frequently	Zone 20	II	1 D	III	Da	very high
	Occasional occurrence	Zone 21	II	2 D	III	Db	high
	Not likely, but if it occurs only rarely and for a short period	Zone 22	II	3 D	III	Dc	enhanced
Methane, coal dust		Mining	I	M1	I	Ma	very high
		Mining	I	M2	I	Mb	high

Minimum requirements for equipment according to Directive 2014/34/EU and standard IEC/EN 60079-0.

Classification into equipment groups and categories (Directive 2014/34/EU)

Equipment Group I – mines endangered by firedamp: categories M1 and M2

For use in underground parts of mines and surface installations endangered by firedamp and/or combustible dust. The equipment shall remain functional even in the event of rare incidents with an explosive atmosphere present: if one means of protection fails, an independent second means provides the requisite level of protection, or protection is assured with two independent faults.

For use in underground parts of mines and surface installations endangered by firedamp and/or combustible dust. If an explosive atmosphere occurs, it must be possible to switch off the equipment. Constructional measures ensure safety in normal operation, even under severe conditions, rough handling and changing environmental influences.

Equipment Group II – all other hazardous areas: categories 1, 2 and 3

For areas where an explosive atmosphere is present continuously, for long periods or frequently. Even with infrequent equipment failures it must remain safe: if one protective measure fails, an independent one ensures safety, or safety is ensured with two independent faults in combination.

For areas where an explosive atmosphere occurs occasionally. Even with frequent equipment failures or normally expected faults, constructional measures ensure the required safety.

For areas where no explosive atmosphere from gases, vapours, mists or whirled-up dust is expected; if it occurs, only rarely and briefly. Safety is ensured in normal operation.

Example of type label: CEAG product

CEAG type label with items 1–13 numbered

Name or registered trade mark (CEAG) and address of the manufacturer
Serial number including year of manufacture
Certificate number, may end with “X” (special conditions for safe use apply) or “U” (component certificate)
Additional IECEx certification
Marking according to directive: equipment group (II), category (2), atmosphere G (gas, vapour or mist) – D (dust)
Marking according to standard IEC/EN
Equipment name/type
CE marking and number of the notified body monitoring the quality system (0158 = EXAM Germany)
Electrical parameters
Other essential information (depends on the standard, e.g. lamp)
Other optional information (e.g. degree of protection)
Permissible ambient temperature (−25 °C to +55 °C); no marking required for −20 °C to +40 °C (standard values)
Marking according to EU directive 2002/96/EC (WEEE)

Part 2 – NEC / CEC reference (USA and Canada)

Typical NEC/CEC Class/Division marking

GasClass I Division 1 Groups A, B, C & D T6

Class IHazard categoryDivision 1Area classificationGroups A, B, C & DHazardous atmosphere categoryT6Temperature classification

DustClass II Division 2 Groups F, G T80 °C

Class IIHazard categoryDivision 2Area classificationGroups F, GHazardous atmosphere categoryT80 °CTemperature classification

Marking according to NEC 505-506 / CEC 18 (Zone)

NEC 505 · gasClass I Zone 1 AEx eb IIC T6 Gb

CEC 18 · gasEx eb IIC T6 Gb

NEC 506 · dustZone 21, AEx tb IIIC T80 °C Db

CEC 18 · dustEx tb IIIC T80 °C Db

Class IHazard categoryZone 1Area classificationAEx / ExExplosion-protection standard (AEx: USA, Ex: Canada)ebMethod of explosion protectionIICHazardous atmosphere category (gas or dust grouping)T6Temperature classificationGb / DbEquipment protection level (gas / dust)

Method of explosion protection

Type of protection	Description	USA – NEC 500 Division	USA – NEC 505 Zone	Canada – CEC J18 Division	Canada – CEC 18 Zone	Protection concept
e	Increased safety	2	1, 2	–	1, 2	No arcs, sparks or hot surfaces
n	Non-incendive	2	2	2	2
d	Flameproof	2	1, 2	–	1, 2	Contain the explosion prevent the flame propagation
–	Explosion-proof	1, 2	1, 2	1, 2	–
q	Powder filled	2	1, 2	–	1, 2
ia	Intrinsic safety	1, 2	0, 1, 2	1, 2	0, 1, 2	Limit the energy of the spark and the surface temperature
ib	Intrinsic safety	2	1, 2	–	1, 2
p	Pressurized (purged)	1, 2	1, 2	1, 2	1, 2	Keep the flammable gas out
pxb	Pressurized (purged)	1, 2	1, 2	–	1, 2
pyb	Pressurized (purged)	1, 2	1, 2	–	1, 2
m	Encapsulation	2	1, 2	–	1, 2
ma	Encapsulation	1, 2	0, 1, 2	–	0, 1, 2
mb	Encapsulation	2	1, 2	–	1, 2
o	Oil immersion	2	1, 2	2	1, 2

Area classification

	Continuous hazard	Intermittent hazard	Hazard under abnormal conditions
NEC 500-503 / CEC J18	Division 1	Division 1	Division 2
NEC 505-506 / CEC 18	Zone 0 (Zone 20 dust)	Zone 1 (Zone 21 dust)	Zone 2 (Zone 22 dust)

Temperature classification according to NEC/CEC

Maximum surface temperature	US Zone concept	US Division / Canada Zone and Division concept
450 ºC (842 ºF)	T1	T1
300 ºC (572 ºF)	T2	T2
280 ºC (536 ºF)		T2A
260 ºC (500 ºF)		T2B
230 ºC (446 ºF)		T2C
215 ºC (419 ºF)		T2D
200 ºC (392 ºF)	T3	T3
180 ºC (356 ºF)		T3A
165 ºC (329 ºF)		T3B
160 ºC (320 ºF)		T3C
135 ºC (275 ºF)	T4	T4
120 ºC (248 ºF)		T4A
100 ºC (212 ºF)	T5	T5
85 ºC (185 ºF)	T6	T6

Hazardous atmosphere category (gas or dust grouping)

Explosive atmosphere	Typical hazard material	Hazard category (NEC 500-503 / CEC J18)	Grouping	Gas grouping (NEC 505 / CEC 18)
Gases and vapours*	Acetylene	Class I	Group A	IIC
	Hydrogen	Class I	Group B	IIC / IIB+H2
	Ethylene/Formaldehyde	Class I	Group C	IIB
	Methane/Octane	Class I	Group D	IIA
Dust**	Metal dust	Class II	Group E	IIIC
	Coal dust	Class II	Group F	IIIC
	Grain dust	Class II	Group G	IIIB
Fibres & Flyings	Wood, paper or cotton processing	Class III	–	IIIA

* Equipment listed and marked in accordance with 505.9(C)(2) for use in Zone 0, 1, or 2 locations is permitted in Class I, Division 2 locations for the same gas and with a suitable temperature class (NEC article 501.5); in Canada equipment suitable for Zone 0, 1 or 2 is permitted in Class I Division 2 locations with a suitable temperature class per CE Code Rule J18-150.

** Equipment listed and marked in accordance with 506.9(C)(2) for Zone 20, 21, or 22 locations is permitted in Class II, Division 2 locations for the same dust atmosphere and with a suitable temperature class. In Canada: (i) EPL Da, Db or Dc can be used in Class II, Division 2 locations per CEC Rule J18-274; (ii) EPL Da can be used in Class II Div 1 locations per CEC Rule J18-224. For Class III: EPL Da can be used in Division 1 and EPL Da, Db or Dc in Division 2, with a temperature class not greater than T120C (T165 °C for equipment that can be overloaded per CEC J18-326 / J18-376).

NEMA enclosure types

Enclosure type	Intended use	Equivalent IP rating*
1	Indoor use, limited amounts of falling dirt	20
3	Outdoor use, rain, sleet, windblown dust, external formation of ice	55
3R	Outdoor use, rain, sleet, external formation of ice	24
3S	Outdoor use, rain, sleet, windblown dust, external mechanisms operable when ice laden	55
4	Indoor or outdoor use, windblown dust and rain, splashing water, hose directed water, external formation of ice	66
4X	Indoor or outdoor use, windblown dust and rain, splashing water, hose directed water, corrosion resistant, external formation of ice laden	66
5	Indoor use, settling airborne dust, falling dirt, non-corrosive liquids	53
6	Indoor or outdoor use, hose directed water, temporary submersion, external formation of ice	67
6P	Indoor or outdoor use, hose directed water, prolonged submersion, external formation of ice	68
7**	Indoor use, Class I, Division 1, Groups A, B, C, and D hazardous locations, air-break equipment	–
8**	Indoor or outdoor use, Class I, Division 1, Groups A, B, C, and D hazardous locations, oil-immersed equipment	–
9**	Indoor use, Class II, Division 1, Groups E, F, and G hazardous locations, air-break equipment	–
10**	Mining applications	–
12	Indoor use, circulating dust, falling dirt, dripping noncorrosive liquids	54
12K	Indoor use, circulating dust, falling dirt, dripping noncorrosive liquids, provided with knockouts	54
13	Indoor use, lint, dust, spraying of water, oil and noncorrosive coolant	54

* NEMA enclosure type can be converted to IP code rating, but IP codes cannot be converted to NEMA. ** Enclosure types for U.S. only (ref. NEMA 250).

Types of protection – flammable gases, vapours and mists (CSA/UL)

Type	Protection level	Type of protection	EPL	CSA/UL standard	Protection concept
d	da	Flameproof enclosure	Ga	CAN/CSA C22.2 No. / UL No. 60079-1	Explosion containment, prevention of flame transmission
d	db	Flameproof enclosure	Gb	CAN/CSA C22.2 No. / UL No. 60079-1	Explosion containment, prevention of flame transmission
p	pxb, pyb	Pressurized enclosure	Gb	CAN/CSA C22.2 No. / UL No. 60079-2	Exclusion of Ex-atmosphere
p	pzc	Pressurized enclosure	Gc	CAN/CSA C22.2 No. / UL No. 60079-2	Exclusion of Ex-atmosphere
q	qb	Powder filling	Gb	CAN/CSA C22.2 No. / UL No. 60079-5	Prevention of explosion diffusion
o	ob	Liquid immersion	Gb	CAN/CSA C22.2 No. / UL No. 60079-6	Exclusion of Ex-atmosphere
e	eb	Increased safety	Gb	CAN/CSA C22.2 No. / UL No. 60079-7	No arcs, sparks or hot surfaces
i	ia	Intrinsic safety	Ga	CAN/CSA C22.2 No. / UL No. 60079-11	Limitation of spark energy and surface temperature
i	ib	Intrinsic safety	Gb	CAN/CSA C22.2 No. / UL No. 60079-11	Limitation of spark energy and surface temperature
i	ic	Intrinsic safety	Gc	CAN/CSA C22.2 No. / UL No. 60079-11	Limitation of spark energy and surface temperature
nA	–	Non-sparking equipment	Gc	CAN/CSA C22.2 No. / UL No. 60079-15	No arcs, sparks or hot surfaces
nC	–	Enclosed equipment	Gc	CAN/CSA C22.2 No. / UL No. 60079-15	Explosion containment, prevention of flame transmission
nR	–	Restricted breathing enclosure	Gc	CAN/CSA C22.2 No. / UL No. 60079-15	Exclusion of Ex-atmosphere for a limited period
m	ma	Encapsulation	Ga	CAN/CSA C22.2 No. / UL No. 60079-18	Exclusion of Ex-atmosphere
m	mb	Encapsulation	Gb	CAN/CSA C22.2 No. / UL No. 60079-18	Exclusion of Ex-atmosphere
m	mc	Encapsulation	Gc	CAN/CSA C22.2 No. / UL No. 60079-18	Exclusion of Ex-atmosphere
i	–	Intrinsic system	Gb	CAN/CSA C22.2 No. / UL No. 60079-25	Limitation of spark energy and surface temperature

Types of protection – combustible dust (CSA/UL)

Type	Protection level	Type of protection	EPL	CSA/UL standard	Protection concept
p	pxb	Pressurized enclosure	Db	CAN/CSA C22.2 No. / UL No. 60079-2	Exclusion of Ex-atmosphere
p	pzc	Pressurized enclosure	Dc	CAN/CSA C22.2 No. / UL No. 60079-2	Exclusion of Ex-atmosphere
i	ia	Intrinsic safety	Da	CAN/CSA C22.2 No. / UL No. 60079-11	Limitation of spark energy and surface temperature
i	ib	Intrinsic safety	Db	CAN/CSA C22.2 No. / UL No. 60079-11	Limitation of spark energy and surface temperature
i	ic	Intrinsic safety	Dc	CAN/CSA C22.2 No. / UL No. 60079-11	Limitation of spark energy and surface temperature
m	ma	Encapsulation	Da	CAN/CSA C22.2 No. / UL No. 60079-18	Exclusion of Ex-atmosphere
m	mb	Encapsulation	Db	CAN/CSA C22.2 No. / UL No. 60079-18	Exclusion of Ex-atmosphere
m	mc	Encapsulation	Dc	CAN/CSA C22.2 No. / UL No. 60079-18	Exclusion of Ex-atmosphere
op is	–	Inherent safe optical radiation	Da	CAN/CSA C22.2 No. / UL No. 60079-28	Limit of radiation energy
op is	–	Inherent safe optical radiation	Db	CAN/CSA C22.2 No. / UL No. 60079-28	Limit of radiation energy
op is	–	Inherent safe optical radiation	Dc	CAN/CSA C22.2 No. / UL No. 60079-28	Limit of radiation energy
op pr · op sh	–	Safe/interlocked optical radiation	Db	CAN/CSA C22.2 No. / UL No. 60079-28	Limitation or containment of radiation energy
op pr · op sh	–	Safe/interlocked optical radiation	Dc	CAN/CSA C22.2 No. / UL No. 60079-28	Limitation or containment of radiation energy
t	ta	Protection by enclosure	Da	CAN/CSA C22.2 No. / UL No. 60079-31	Exclusion of dust
t	tb	Protection by enclosure	Db	CAN/CSA C22.2 No. / UL No. 60079-31	Exclusion of dust
t	tc	Protection by enclosure	Dc	CAN/CSA C22.2 No. / UL No. 60079-31	Exclusion of dust

Committees and directives

NEMA – National Electrical Manufacturers Association. NEMA 250 series standards for enclosure types cover both hazardous and non-hazardous areas.
NEC – National Electrical Code (USA) · CEC – Canadian Electrical Code (Canada)

More on hazardous areas per NEC/CEC is in Eaton's Code Digest (NEC) and Hazardous Location Guide (CEC): Crouse-Hinds series training & technical info · 2020 Code Digest (NEC) · 2012 Hazardous Location Guide (CEC)

Eaton Crouse-Hinds distributor in Vietnam

Viet Thang Loi Technology Company Limited (VTL TECH)

19A Cong Hoa Street, Bay Hien Ward, Ho Chi Minh City

Tel: 028 3811 0510 / 11 · Fax: 028 3811 0512

Email: info@vtltech.com.vn · www.vtltech.com.vn

Advice on selecting CEAG / Crouse-Hinds explosion-protected equipment by zone, gas group and temperature class:

028 3811 0510

Send an enquiry

Eaton

Neuer Weg – Nord 49, D-69412 Eberbach

Tel +49 (0) 6271/806-500

E-mail info-ex@eaton.com · www.eaton.com

Content from “Global Reference Guide on the Marking of Electrical Equipment for Use in Explosive Atmospheres” © 2023 Eaton, Publication No. 300 8000 2154. Always refer to the official standards and certificates when designing and selecting equipment.