Guide to Hazardous Locations - FM Approvals

Guide to Hazardous Locations

Explosive Gas Atmospheres

Ex Marking

US (NEC 500) and CA (CE Code Annex J18)

?

Type of Protection

(optional except for I.S.)

Protection

Concepts

Type of Protection

Code

Permitted Division

(optional except for Division 2)

Increased Safety

Temperature Class

(T5 and T6 optional)

Permitted Group

Ambient temperature ranges other than standard (-25¡ãC ¡Ü Ta ¡Ü +40¡ãC) must be marked.

US (NEC? 505)

Non-Incendive

Explosionproof

American

National

Standard

Permitted Class

Type of

(optional)

Protection

Flameproof

Equipment Protection Level

(optional)

Class I, Zone 1, AEx db [ia Ga] IIC T5 Gb

Explosion-Protected

Permitted Zone

Gas Group

I.S. Output

Temperature Class

Ambient temperature ranges other than standard (-20¡ãC ¡Ü Ta ¡Ü +40¡ãC) must be marked.

CA (CE Code Section 18), EU and IEC

Type of Protection

Equipment

Protection

Level

Powder-Filled

Temperature

Class

NI Component

Ex db [ia Ga] IIC T5 Gb

Gas Group

Explosion-Protected

I.S. Output

Intrinsic Safety

Equipment

Protection

Level

Ambient temperature ranges other than standard (-20¡ãC < Ta < +40¡ãC) must be marked.

Additional EU marking per 2014/34/EU (ATEX)

CE Conformity Marking

Explosion Protection Marking

Type of Exposive Atmosphere:

G (for gas, vapor, mist)

II 2(1) G

2809

Category for I.S. Output

Category

Equipment Group 1 (for Zone 0)

I (for mines) 2 (for Zone 1)

II (for other than mines) 3 (for Zone 2)

Identification Number of Notified Body

Involved in Production Control Stage

Pressurized

Typical Zone

IEC

EU (ATEX)

EPL Group Category Group of Application

Mines, ¡°very high¡±

Ma

level of protection

Mines, ¡°high¡±

level of protection

Gas atmospheres,

¡°very high¡± level

of protection

Gas atmospheres,

¡°high¡± level of

protection

Gas atmospheres,

¡°enhanced¡± level

of protection

M1

I

I

Mb

M2

Ga

1G

Gb

II

Gc

2G

N/A

0

1

II

3G

2

Restricted Breathing

Encapsulation

FM Approvals is your global

conformity assessment solution

Market Recognized product certification marks

Canada

C

C

C

US

US

Sealed Device

EU (ATEX)

FM Approvals can also issue IECEx Test Reports, Quality Assessment Reports and

Certificates of Conformity.

FM Approvals

1151 Boston-Providence Turnpike, Norwood, MA, US 02062-9102

Phone: +1 (1)781 255 4851 Fax: +1 (1)781 762 9375

E-mail: information@

In Europe, FM Approvals Europe Limited

One Georges Quay Plaza, Dublin 2, D02 E440, Ireland

P0296 ? 2013 FM Approvals

(Rev. 05/2020) All rights reserved.



Class I, Division 1 & 2

Class I, Division 1 & 2

Class I, Zone 0, 1 & 2

Zone 0, 1, & 2

Category 1G, 2G, & 3G

EPL Ga, Gb, Gc

Class I, Zone 1

Zone 1

EPL Gb

EPL Gb

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

Class I, Division 2

Class I, Division 2

Class I, Division 1

Class I, Division 1

Class I, Zone 0

Zone 0

Category 1G

EPL Ga

Class I, Zone 1

Zone 1

Category 2G

EPL Gb

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

Class I, Zone 1

Zone 1

Category 2G

EPL Gb

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

Class I, Division 1

(I.S.)

CA

Class I, Division 1

AEx ia

Ex ia

Ex ia

Ex ia

AEx ib

Ex ib

Ex ib

Ex ib

AEx ic

Ex ic

Ex ic

Ex ic

US

CA

EU

IEC

US

CA

EU

IEC

US

CA

EU

IEC

Class I, Zone 0

Zone 0

Category 1G

EPL Ga

Class I, Zone 1

Zone 1

Category 2G

EPL Gb

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

FM 3600

CSA C22.2 No. 0

ANSI/UL 60079-0

CSA C22.2 No. 60079-0

EN IEC 60079-0

IEC 60079-0

ANSI/UL 60079-7

CSA C22.2 No. 60079-7

EN IEC 60079-7

IEC 60079-7

ANSI/UL 60079-7

CSA C22.2 No. 60079-7

EN IEC 60079-7

IEC 60079-7

FM 3611

CSA C22.2 No. 213

FM 3615

CSA C22.2 No. 30

ANSI/UL 60079-1

CSA C22.2 No. 60079-1

EN 60079-1

IEC 60079-1

ANSI/UL 60079-1

CSA C22.2 No. 60079-1

EN 60079-1

IEC 60079-1

ANSI/UL 60079-1

CSA C22.2 No. 60079-1

EN 60079-1

IEC 60079-1

ANSI/UL 60079-5

CSA C22.2 No. 60079-5

EN 60079-5

IEC 60079-5

ANSI/UL 60079-15

CSA C22.2 No. 60079-15

EN IEC 60079-15

IEC 60079-15

FM 3610

C22.2 No. 60079-11 or

CSA C22.2 No. 157

ANSI/UL 60079-11

CSA C22.2 No. 60079-11

EN 60079-11

IEC 60079-11

ANSI/UL 60079-11

CSA C22.2 No. 60079-11

EN 60079-11

IEC 60079-11

ANSI/UL 60079-11

CSA C22.2 No. 60079-11

EN 60079-11

IEC 60079-11

Flammable Material Flammable Material

Present Continuously Present Intermittently Present Abnormally

IEC / EU

US (NEC? 505)

US (NEC? 500)

CA (CE Code Section 18)

CA (CE Code Annex J18)

No arcs,

sparks or

hot surfaces

Contain

the explosion

and extinguish

the flame

Type X

Type X

Type Y

Type Y

Type Z

Type Z

AEx pxb (or AEx px)

Ex pxb (or Ex px)

Ex pxb

Ex pxb

AEx pyb (or AEx py)

Ex pyb (or Ex py)

Ex pyb

Ex pyb

AEx pzc (or AEx pz)

Ex pzc (or Ex pz)

Ex pzc

Ex pzc

US

CA

US

CA

US

CA

US

CA

EU

IEC

US

CA

EU

IEC

US

CA

EU

IEC

Class I, Division 1

Class I, Division 1

Class I, Division 1

Class I, Division 1

Class I, Division 2

Class I, Division 2

Class I, Zone 1

Zone 1

Category 2G

EPL Gb

Class I, Zone 1

Zone 1

Category 2G

EPL Gb

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

Liquid Immersion

AEx nR

Ex nR

Ex nR

Ex nR

AEx ma

Ex ma

Ex ma

Ex ma

AEx mb (or AEx m)

Ex mb

Ex mb

Ex mb

AEx mc

Ex mc

Ex mc

Ex mc

AEx nC

Ex nC

Ex nC

Ex nC

AEx ob (or AEx o)

Ex ob

Ex ob

Ex ob

AEx oc

Ex oc

Ex oc

Ex oc

US

CA

EU

IEC

US

CA

EU

IEC

US

CA

IEC

EU

US

CA

EU

IEC

US

CA

EU

IEC

US

CA

EU

IEC

US

CA

EN

IEC

Note 5: For the US, the marking of ¡°Class I¡± for Zones 0, 1, or 2 is optional.

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

Class I, Zone 0

Zone 0

Category 1G

EPL Ga

Class I, Zone 1

Zone 1

EPL Gb

Category 2G

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

Class I, Zone 1

Zone 1

Category 2G

EPL Gb

Class I, Zone 2

Zone 2

Category 3G

EPL Gc

Zone 1

Zone 2

Zone 0

Zone 1

Zone 2

Division 2

Zone 1

Zone 2

Division 2

Division 1

Zone 0

Division 1

IEC classification per IEC 60079-10-1

EU classification per EN 60079-10-1

US classification per ANSI/NFPA 70 National Electrical Code? (NEC?) Article 500 or Article 505

CA classification per CSA C22.1 Canadian Electrical Code (CE Code) Section 18 or Annex J

Equipment Grouping

Typical gas

Acetylene

Hydrogen

Ethylene

Propane

Methane

US (NEC? 505)

CA (CE Code Section 18)

EU

IEC

US (NEC? 500)

CA (CE Code Annex J18)

Group IIC

Class I/Group A

(Group IIB + H2)

Class I/Group B

Group IIB

Class I/Group C

Group IIA

Class I/Group D

Group I*

Mining*

*Not within scope of NEC . Under jurisdiction of MSHA. Not within scope of CE Code.

?

Marking

450¡ãC

300¡ãC

280¡ãC

260¡ãC

230¡ãC

215¡ãC

200¡ãC

180¡ãC

165¡ãC

160¡ãC

135¡ãC

120¡ãC

100¡ãC

85¡ãC

Limit

energy of

sparks and

surface

temperature

US (NEC? 505)

CA (CE Code) Section 18)

EU

IEC

US (NEC? 500)

CA (CE Code Annex J18)

T1

T1

T2

T2

T2A

T2B

T2C

T2D

T3

T3

T3A

T3B

T3C

T4

T4

T4A

T5

T5

T6

T6

Ingress Protection (IP) Codes

FM 3620 (NFPA 496)

NFPA 496

FM 3620 (NFPA 496)

NFPA 496

FM 3620 (NFPA 496)

NFPA 496

ANSI/UL 60079-2

CSA C22.2 No. 60079-2

EN 60079-2

IEC 60079-2

ANSI/UL 60079-2

CSA C22.2 No. 60079-2

EN 60079-2

IEC 60079-2

ANSI/UL 60079-2

CSA C22.2 No. 60079-2

EN 60079-2

IEC 60079-2

ANSI/UL 60079-15

CSA C22.2 No. 60079-15

EN IEC 60079-15

IEC 60079-15

ANSI/UL 60079-18

CSA C22.2 No. 60079-18

EN 60079-18

IEC 60079-18

ANSI/UL 60079-18

CSA C22.2 No. 60079-18

IEC 60079-18

EN 60079-18

ANSI/UL 60079-18

CSA C22.2 No. 60079-18

EN 60079-18

IEC 60079-18

ANSI/UL 60079-15

CSA C22.2 No. 60079-15

EN IEC 60079-15

IEC 60079-15

ANSI/UL 60079-6

CSA C22.2 No. 60079-6

EN 60079-6

IEC 60079-6

ANSI/UL No. 60079-6

CSA No. 60079-6

EN 60079-6

IEC 60079-6

Zone 0

Temperature Class

First Characteristic Numeral

Second Characteristic Numeral

Protection against solid bodies

Protection against liquid

0

1

2

3

4

5

6

7

8

9

Note 3: For associated equipment used with pressurized equipment, such as a pressurization control system installed within the hazardous

location, the symbol for the Type of Protection is enclosed within brackets (e.g., Ex db [pxb] IIC T4 Gb).

Note 4: The associated equipment not suitable for installation in a hazardous location, both the symbol ¡°Ex¡± or ¡°AEx¡± and the symbol ¡°pxb¡±

are enclosed within the same square brackets (e.g., [AEx pxb Gb]). In this case, a temperature class is not included.

Level of protection assigned to equipment based on its likelihood of becoming a source

of ignition

US

AEx

Ex

Ex

Ex

AEx eb (or AEx e)

Ex eb (or Ex e)

Ex eb

Ex eb

AEx ec

Ex ec

Ex ec

Ex ec

(NI)

(NI)

(XP)

(XP)

AEx da

Ex da

Ex da

Ex da

AEx db (or AEx d)

Ex db (or Ex d)

Ex db

Ex db

AEx dc

Ex dc

Ex dc

Ex dc

AEx qb (or AEx q)

Ex qb (or Ex q)

Ex qb

Ex qb

AEx nC

Ex nC

Ex nC

Ex nC

(I.S.)

US

CA

US

CA

EU

IEC

US

CA

EU

IEC

US

CA

EU

IEC

US

CA

US

CA

US

CA

EU

IEC

US

CA

EN

IEC

US

CA

EU

IEC

US

CA

EU

IEC

US

CA

EU

IEC

US

Protection Principle

Note 1: For associated intrinsically safe apparatus suitable for installation in a hazardous location, the symbols for the type of protection

¡°ia¡± or ¡°ib¡± are enclosed within square brackets (e.g., Class I, Zone 1 AEx db [ia Ga] IIC T4 Gb).

Note 2: For associated intrinsically safe apparatus not suitable for installation in a hazardous location, both the symbol ¡°Ex¡± or ¡°AEx¡± and

the symbol for the type of protection ¡°ia¡±, ¡°ib¡± or ¡°ic¡± are enclosed within the same square brackets (e.g., [AEx ia Ga]); in this case, a temperature

class is not included.

EPL/Category

Definition

Standard

General Requirements

Permitted Class

Explosionproof for Class I,

Division 1, Groups A, B, C, D T5

Market Application

Area Classification

Flammable Material

Keep

flammable

gas out

No protection

No protection

Objects greater than 50mm

Vertical (90?) dripping water

Objects greater than 12mm

75? to 90? dripping water

Objects greater than 2.5mm

Sprayed water

Objects greater than 1mm

Splashed water

Dust-protected

Water jets

Dust-tight

Heavy seas

Temporary immersion

Continuous immersion

High pressure/temperature water jet

Approximate US enclosure type equivalent to IPXX

Type

IP

Type

IP

Type

1 10

3S 54

6 and 6P 67

2 11

4 and 4X 55

12 and 12K 52

3 54

5 52

13 54

3R 14

Acronyms

ATEX

CA

CE Code

EPL

EU

IEC

I.S.

MSHA

NFPA

NEC?

US

Atmosph¨¨re explosible

Canada

Canadian Electrical Code (CSA C22.1)

Equipment Protection Level

European Union

International Electrotechnical Commission

Intrinsic Safety

Mine Safety and Health Administration

National Fire Protection Association

National Electrical Code? (NFPA 70)

United States of America

IP

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