Which product-safety certification mark applies in which market, who administers it and under what law (CE, UL, CSA, CCC, PSE, KC, BSMI, RCM, EAC, NOM, INMETRO and others), and how the two hazardous-area classification systems map onto each other: NEC Class/Division designations against IEC/ATEX Zone designations, gas group cross-references (NEC Group A-D against IEC IIA-IIC), temperature-class mappings, and the protection-concept codes (Ex d, AEx e, intrinsic safety) with the US, Canadian and IEC standards behind each. Answers 'is a CB certificate accepted in the US', 'what is the ATEX equivalent of Class I Division 2', and 'which mark is compulsory in China' — questions where the honest answer is often that there is no direct equivalent, and saying so is the value.

Factual compilation with source citations. Facts about which mark applies where and how classification systems map are taken with short attributed quotes linking back to the published guide or page. No standard text is reproduced.

Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** A

**Stated equivalent:** IIC

**Applies to:** Acetylene

> A | IIC | Acetylene | <0.50 mm

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

A — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx maD

**Stated equivalent:** Zone 20

**Governing standard / law:** ISA 61241-18

> AEx maD Zone 20 ISA 61241-18

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx maD — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** S Mark

**Market / system:** Argentina

**Administered by:** IRAM

**Mandatory / voluntary:** mandatory in Argentina

> Product certification to IEC-based standards is mandatory in Argentina under the auspices of its standards body IRAM with conformance indicated by the S Mark.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

S Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** II 1D

**Market / system:** ATEX

**Stated equivalent:** Da

**Applies to:** Zone 20, 21 & 22

> fr, d, p, h Equipment Groups Zone 0 DUST Zones Equipment Group Deﬁni on Suitable for Zone 20, 21 & 22 GAS Zones Group I Electrical equipment intended for use ATEX Group & Category: II 1D in mines suscep ble to ﬁre damp IECEx Equipment Protec on Level: Da Electrical equipment intended for use in Types of protec on (electrical):

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

II 1D — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** II 1G

**Market / system:** ATEX

**Stated equivalent:** Ga

**Applies to:** Zone 0, 1 & 2

> Zone 0, 1 & 2 Ace c Acid, Acetone, Ammonia, Butane, Cyclohexane, ATEX Group & Category: II 1G Propane, Gasoline (petrol), IECEx Equipment Protec on Level: Ga IIA Methane (natural gas, non-mining), Toluene, Xylene.

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

II 1G — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** II 2D

**Market / system:** ATEX

**Stated equivalent:** Db

**Applies to:** Zone 21 & 22

> Suitable for Zone 21 & 22 ATEX Group & Category: II 2D Temperature Class (T Class) IECEx Equipment Protec on Level: Db

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

II 2D — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** II 2G

**Market / system:** ATEX

**Stated equivalent:** Gb

**Applies to:** Zone 1 & 2

> h Methyl ethyl ketone (MEK), Propane-1-ol (n-propyl alcohol) Suitable for Zone 1 & 2 IIC Group IIA and IIB gases plus, Acetylene, Hydrogen ATEX Group & Category: II 2G IECEx Equipment Protec on Level: Gb Types of protec on (electrical):

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

II 2G — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** II 3D

**Market / system:** ATEX

**Stated equivalent:** Dc

**Applies to:** Zone 22 only

> d, h Ammonia (630°C), Hydrogen (560°C), Suitable for Zone 22 only T1: 450°C Methane (537°C), Propane (470°C) ATEX Group & Category: II 3D Zone 22 T2: 300°C Ethylene (425°C), Butane (372°C), Acetylene (305°C) IECEx Equipment Protec on Level: Dc Types of protec on (electrical):

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

II 3D — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** II 3G

**Market / system:** ATEX

**Stated equivalent:** Gc

**Applies to:** Zone 2 only

> d, p, h Dust Groups that make up the dust Suitable for Zone 2 only IIIA Combus ble Fibres and Flyings ATEX Group & Category: II 3G IIIB Group IIIA dusts plus, Non-Conduc ve Dusts IECEx Equipment Protec on Level: Gc Zone 1 IIIC Group IIIA and IIIB dusts plus, Conduc ve Dusts Types of protec on (electrical):

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

II 3G — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** RCM

**Market / system:** Australia

**Meaning:** consolidates the previously separate C-Tick, A-Tick and RCM marks, effective from March 2013

**Administered by:** Standards Australia

> RCM Tick Mark - Australia Australia has a national standards body, Standards Australia, covering many different industry sectors including Electrotechnology and Energy, which embraces electrical/electronic equipment and appliances with relevant standards for safety. Australia’s Regulatory Compliance Mark (RCM) now consolidates the previously separate C-Tick, A-Tick and RCM marks, effective from March 2013.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

RCM — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** B

**Stated equivalent:** IIC (partially IIB+H₂)

**Applies to:** Hydrogen, butadiene

> B | IIC (partially IIB+H₂) | Hydrogen, butadiene | <0.50 mm

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

B — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** INMETRO Mark

**Market / system:** Brazil

**Applies to:** medical electrical equipment, ballasts and equipment used in hazardous locations

**Mandatory / voluntary:** mandatory in Brazil

> Certification of certain product groups, such as medical electrical equipment, ballasts and equipment used in hazardous locations, is mandatory in Brazil with accreditation indicated by the INMETRO Mark.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

INMETRO Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** C

**Stated equivalent:** IIB

**Applies to:** Ethylene, ethyl ether

> C | IIB | Ethylene, ethyl ether | 0.50–0.90 mm

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

C — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (DIP) A21

**Market / system:** CA

**Stated equivalent:** Division 1

**Applies to:** Class II

**Governing standard / law:** CSA E61241-1-1

> (DIP) A21 CA Class II Division 1 CSA E61241-1-1

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(DIP) A21 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex d

**Market / system:** CA

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** CSA 60079-1

> Ex d CA Class I Zone 1 CSA 60079-1

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex d — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex e

**Market / system:** CA

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** CSA E60079-7

> Ex e CA Class I Zone 1 CSA E60079-7

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex e — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** EX ia

**Market / system:** CA

**Stated equivalent:** Zone 0

**Applies to:** Class I

**Governing standard / law:** CSA E60079-11

> EX ia CA Class I Zone 0 CSA E60079-11

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

EX ia — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex ib

**Market / system:** CA

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** CSA E60079-11

> Ex ib CA Class I Zone 1 CSA E60079-11

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex ib — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex m

**Market / system:** CA

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** CSA E60079-18

> Encapsulated Ex m CA Class I Zone 1 CSA E60079-18

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex m — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** EX nA

**Market / system:** CA

**Stated equivalent:** Zone 2

**Applies to:** Class I

**Governing standard / law:** CSA E60079-15

> EX nA CA Class I Zone 2 CSA E60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

EX nA — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex nC

**Market / system:** CA

**Stated equivalent:** Zone 2

**Applies to:** Class I

**Governing standard / law:** CSA E60079-15

> Ex nC CA Class I Zone 2 CSA E60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex nC — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex nL

**Market / system:** CA

**Stated equivalent:** Zone 2

**Applies to:** Class I

**Governing standard / law:** CSA E60079-15

> Ex nL CA Class I Zone 2 CSA E60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex nL — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex nR

**Market / system:** CA

**Stated equivalent:** Zone 2

**Applies to:** Class I

**Governing standard / law:** CSA E60079-15

> Breathing Ex nR CA Class I Zone 2 CSA E60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex nR — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** EX o

**Market / system:** CA

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** CSA E60079-6

> EX o CA Class I Zone 1 CSA E60079-6

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

EX o — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex px

**Market / system:** CA

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** CSA E60079-2

> Ex px CA Class I Zone 1 CSA E60079-2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex px — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex py

**Market / system:** CA

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** CSA E60079-2

> Ex py CA Class I Zone 1 CSA E60079-2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex py — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex pz

**Market / system:** CA

**Stated equivalent:** Zone 2

**Applies to:** Class I

**Governing standard / law:** CSA E60079-2

> Ex pz CA Class I Zone 2 CSA E60079-2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex pz — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex q

**Market / system:** CA

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** CSA E60079-5

> Ex q CA Class I Zone 1 CSA E60079-5

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex q — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex

**Market / system:** CA

**Stated equivalent:** Division 1 & 2

**Applies to:** Class I

**Governing standard / law:** CSA 60079-0

> Ex CA Class I Division 1 & 2 CSA 60079-0

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (IS)

**Market / system:** CA

**Stated equivalent:** Division 1

**Applies to:** Class II

**Governing standard / law:** CSA C22.2 No. 157

> (IS) CA Class II Division 1 CSA C22.2 No. 157

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(IS) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (IS)

**Market / system:** CA

**Stated equivalent:** Division 1

**Applies to:** Class III

**Governing standard / law:** CSA C22.2 No. 157

> (IS) CA Class III Division 1 CSA C22.2 No. 157

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>


**Designation:** (IS)

**Market / system:** CA

**Stated equivalent:** Division 1

**Applies to:** Class I

**Governing standard / law:** C22.2 No. 157

> (IS) CA Class I Division 1 C22.2 No. 157

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>


**Designation:** (NI)

**Market / system:** CA

**Stated equivalent:** Division 2

**Applies to:** Class I

**Governing standard / law:** C22.2 No. 213

> (NI) CA Class I Division 2 C22.2 No. 213

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(NI) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (PX)

**Market / system:** CA

**Stated equivalent:** Division 1

**Applies to:** Class II

**Governing standard / law:** NFPA 496

> (PX) CA Class II Division 1 NFPA 496

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(PX) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (PY)

**Market / system:** CA

**Stated equivalent:** Division 1

**Applies to:** Class II

**Governing standard / law:** NFPA 496

> (PY) CA Class II Division 1 NFPA 496

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(PY) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (PZ)

**Market / system:** CA

**Stated equivalent:** Division 2

**Applies to:** Class II

**Governing standard / law:** NFPA 496

> (PZ) CA Class II Division 2 NFPA 496

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(PZ) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Type Y

**Market / system:** CA

**Stated equivalent:** Division 1

**Applies to:** Class I

**Governing standard / law:** NFPA 496

> Type Y CA Class I Division 1 NFPA 496

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Type Y — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Type Z

**Market / system:** CA

**Stated equivalent:** Division 2

**Meaning:** Pressurized

**Applies to:** Class I

**Governing standard / law:** NFPA 496

> Pressurized Type Z CA Class I Division 2 NFPA 496

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Type Z — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (XP)

**Market / system:** CA

**Stated equivalent:** Division 1

**Applies to:** Class I

**Governing standard / law:** C22.2 No. 30

> (XP) CA Class I Division 1 C22.2 No. 30

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(XP) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CAN/CSA-C22.2 No. 60335-1

**Market / system:** Canada

**Stated equivalent:** IEC 60335-1

> In North America, IEC 60335-1 has been used as the basis for a tri-national standard between the United States (UL 60335-1), Canada (CAN/CSA-C22.2 No. 60335-1), and Mexico (NMX-J-521/1-ANCE).

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

CAN/CSA-C22.2 No. 60335-1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CSA Mark

**Market / system:** Canada

**Meaning:** identify products acceptable in either Canada (C suffix letter) and/or the USA (US suffix)

**Administered by:** Canadian Standards Association

> CSA Mark - Canada The <https://www.csagroup.org/> Canadian Standards Association operates the CSA marking scheme alongside UL certification to identify products acceptable in either Canada (C suffix letter) and/or the USA (US suffix).

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

CSA Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CB Scheme

**Meaning:** the world’s first international system for the mutual acceptance of product safety test reports and certificates for electrical and electronic equipment, devices, and components

**Administered by:** IECEE

> IECEE CB Scheme Testing & Certification |

Source: <https://www.tuvsud.com/en-us/services/product-certification/iecee-cb-scheme>

CB Scheme — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CE Marking

**Meaning:** a manufacturer’s declaration that a product meets the applicable health, safety, and environmental requirements outlined in the appropriate European product legislation and has undergone the relevant conformity assessment procedure

**Governing standard / law:** Decision 768/2008

> Decision 768/2008 – a common framework for the marketing of products , which lays down rules for CE marking. CE Marking on a product is a manufacturer’s declaration that a product meets the applicable health, safety, and environmental requirements outlined in the appropriate European product legislation and has undergone the relevant conformity assessment procedure.

Source: <https://www.nist.gov/standardsgov/compliance-faqs-ce-marking>

CE Marking — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Certification Body (CB) scheme

**Meaning:** allows manufacturers who have been issued a CB test certificate by one National Certification Body (NCB) to obtain certification marks from other participating NCBs

> To ease the issue of regional differences, the Certification Body (CB) scheme allows manufacturers who have been issued a CB test certificate by one National Certification Body (NCB) to obtain certification marks from other participating NCBs.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

Certification Body (CB) scheme — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CCC Mark

**Market / system:** China

**Meaning:** indicates compliance with Chinese laws and regulations

**Mandatory / voluntary:** compulsory for any product used for commercial purposes in China

> CCC Mark - China The CCC (China Compulsory Certificate) Mark indicates compliance with Chinese laws and regulations and, as its names implies, is compulsory for any product used for commercial purposes in China.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

CCC Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Class II

**Stated equivalent:** Zone 20/21/22

**Meaning:** NEC separates dust into Class II (Groups E, F, G); IEC integrates dust into the same zone framework (Zone 20/21/22) with dust groups IIIA, IIIB, IIIC

> Dust handling: NEC separates dust into Class II (Groups E, F, G); IEC integrates dust into the same zone framework (Zone 20/21/22) with dust groups IIIA, IIIB, IIIC.

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Class II — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Class III

**Meaning:** NEC Class III (fibers/flyings) has no IEC equivalent

> Fiber hazards: NEC Class III (fibers/flyings) has no IEC equivalent. IEC considers fibers within the dust framework.

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Class III — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** D

**Stated equivalent:** IIA

**Applies to:** Methane, propane, gasoline

> D | IIA | Methane, propane, gasoline | >0.90 mm

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

D — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (DIP) A22

**Stated equivalent:** Division 2

**Governing standard / law:** CSA E61241-1-1

> (DIP) A22 Division 2 CSA E61241-1-1

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(DIP) A22 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Division 1

**Stated equivalent:** Category 2

> Map existing equipment to ATEX categories (Division 1 equipment generally satisfies Category 2; Division 2 satisfies Category 3)

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Division 1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Division 1

**Stated equivalent:** Zone 1 (+ Zone 0)

**Meaning:** Explosive atmosphere likely during normal operation (10–1000 hrs/yr)

> Division 1 | Zone 1 (+ Zone 0) | Explosive atmosphere likely during normal operation (10–1000 hrs/yr)

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>


**Designation:** Division 2

**Stated equivalent:** Category 3

> Map existing equipment to ATEX categories (Division 1 equipment generally satisfies Category 2; Division 2 satisfies Category 3)

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Division 2 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Division 2

**Stated equivalent:** Zone 2

**Meaning:** Explosive atmosphere not likely; only abnormal conditions (<10 hrs/yr)

> Division 2 | Zone 2 | Explosive atmosphere not likely; only abnormal conditions (<10 hrs/yr)

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>


**Designation:** Dust-ignition-proof

**Stated equivalent:** Ex t (Dust protection by enclosure)

**Meaning:** Prevent dust ingress and limit surface temperature

**Governing standard / law:** IEC 60079-31

> Dust-ignition-proof | Ex t (Dust protection by enclosure) | IEC 60079-31 | Prevent dust ingress and limit surface temperature

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Dust-ignition-proof — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CE marking

**Market / system:** EU

**Meaning:** CE marking is not a third-party approval. It is a manufacturer's self-declaration of conformity with applicable EU law

> CE marking is not a third-party approval. It is a manufacturer's self-declaration of conformity with applicable EU law

Source: <https://blog.promise.legal/fcc-certification-ce-marking-connected-devices-hardware-startups/>

CE marking — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CE marking

**Market / system:** EU

**Mandatory / voluntary:** compulsory for most products covered by the New Approach Directives

> Do all products sold in EU require CE marking? No. CE marking is compulsory for most products covered by the New Approach Directives. Products not covered under a New Approach Directive do not require CE marking. It is illegal to place a CE mark on a product that is not covered by a directive.

Source: <https://www.nist.gov/standardsgov/compliance-faqs-ce-marking>


**Designation:** EMC Directive

**Market / system:** EU

**Meaning:** Covers electromagnetic compatibility—making sure your product doesn't interfere with other electronics

**Governing standard / law:** 2014/30/EU

> EMC Directive (2014/30/EU): Covers electromagnetic compatibility—making sure your product doesn't interfere with other electronics

Source: <https://ecocomply.ai/blog/what-does-ce-marking-cost-for-your-product>

EMC Directive — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** EMC Directive

**Market / system:** EU

**Applies to:** Wired-only industrial sensors with no radio transmitter

**Governing standard / law:** 2014/30/EU

> Wired-only industrial sensors with no radio transmitter fall under the EMC Directive (2014/30/EU) instead of RED

Source: <https://blog.promise.legal/fcc-certification-ce-marking-connected-devices-hardware-startups/>


**Designation:** EN 300 328

**Market / system:** EU

**Meaning:** the primary standard for Article 3.2 radio spectrum compliance for 2.4 GHz Wi-Fi and Bluetooth devices

**Applies to:** 2.4 GHz Wi-Fi and Bluetooth devices

> EN 300 328 — the primary standard for Article 3.2 radio spectrum compliance for 2.4 GHz Wi-Fi and Bluetooth devices

Source: <https://blog.promise.legal/fcc-certification-ce-marking-connected-devices-hardware-startups/>

EN 300 328 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** EN 62368-1

**Market / system:** EU

**Stated equivalent:** EN 60950-1

**Meaning:** covers Article 3.1(a) audio/video and IT equipment safety

> EN 62368-1 (replacing the older EN 60950-1) — covers Article 3.1(a) audio/video and IT equipment safety

Source: <https://blog.promise.legal/fcc-certification-ce-marking-connected-devices-hardware-startups/>

EN 62368-1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Low Voltage Directive

**Market / system:** EU

**Applies to:** mains-powered above 50V AC or 75V DC

**Governing standard / law:** 2014/35/EU

> If your device is mains-powered above 50V AC or 75V DC, the Low Voltage Directive (2014/35/EU) also applies

Source: <https://blog.promise.legal/fcc-certification-ce-marking-connected-devices-hardware-startups/>

Low Voltage Directive — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** LVD

**Market / system:** EU

**Meaning:** Safety requirements for electrical equipment operating between 50–1000V AC

**Applies to:** electrical equipment operating between 50–1000V AC

**Governing standard / law:** 2014/35/EU

> LVD (2014/35/EU): Safety requirements for electrical equipment operating between 50–1000V AC

Source: <https://ecocomply.ai/blog/what-does-ce-marking-cost-for-your-product>

LVD — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Machinery Directive

**Market / system:** EU

**Meaning:** Safety requirements for machines and mechanical equipment

**Applies to:** machines and mechanical equipment

**Governing standard / law:** 2006/42/EC

> Machinery Directive (2006/42/EC): Safety requirements for machines and mechanical equipment

Source: <https://ecocomply.ai/blog/what-does-ce-marking-cost-for-your-product>

Machinery Directive — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** MDR

**Market / system:** EU

**Meaning:** Medical device regulation with strict clinical and documentation requirements

**Applies to:** medical devices

**Governing standard / law:** 2017/745

> MDR (2017/745): Medical device regulation with strict clinical and documentation requirements

Source: <https://ecocomply.ai/blog/what-does-ce-marking-cost-for-your-product>

MDR — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Radio Equipment Directive (RED)

**Market / system:** EU

**Meaning:** the governing framework for any radio-transmitting device placed on the EU market

**Governing standard / law:** Directive 2014/53/EU

> Directive 2014/53/EU — the Radio Equipment Directive (RED) — which has applied since June 13, 2017

Source: <https://blog.promise.legal/fcc-certification-ce-marking-connected-devices-hardware-startups/>

Radio Equipment Directive (RED) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** RED

**Market / system:** EU

**Meaning:** Radio equipment including Wi-Fi, Bluetooth, and cellular

**Applies to:** Radio equipment including Wi-Fi, Bluetooth, and cellular

**Governing standard / law:** 2014/53/EU

> RED (2014/53/EU): Radio equipment including Wi-Fi, Bluetooth, and cellular

Source: <https://ecocomply.ai/blog/what-does-ce-marking-cost-for-your-product>

RED — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** A-deviation

**Market / system:** Europe

**Meaning:** Information that the provisions of an EN are in conflict with national regulation shall be included in an Annex to the European Standard, called A-deviation

> Information that the provisions of an EN are in conflict with national regulation shall be included in an Annex to the European Standard, called A-deviation

Source: <https://boss.cenelec.eu/homegrowndeliverables/en/pages/adev/>

A-deviation — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CE marking

**Market / system:** Europe

**Meaning:** indicates that a product is declared by the manufacturer as being in conformity with European Union harmonization legislation

**Governing standard / law:** EU-Regulations or EU-Directives

> The CE marking is the visible consequence of the above process and indicates that a product is declared by the manufacturer as being in conformity with European Union harmonization legislation

Source: <https://casco.iso.org/attestations-of-conformity.html>


**Designation:** EN 60335-1

**Market / system:** Europe

**Stated equivalent:** IEC 60335-1

**Meaning:** defines how appliances may comply with European directives, such as the low voltage directive

> The European standard is EN 60335-1 and defines how appliances may comply with European directives, such as the low voltage directive.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

EN 60335-1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** ENEC Mark

**Market / system:** Europe

**Meaning:** the mark used to denote compliance with the European Norm (EN) standards for all electrical product sectors

> ENEC Mark - Europe The ENEC Mark is simply the mark used to denote compliance with the European Norm (EN) standards for all electrical product sectors, as tested by approved independent testing laboratories worldwide.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

ENEC Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** EU Declaration of Conformity (EU-DoC)

**Market / system:** Europe

**Meaning:** the EU legislation imposes an obligation on the manufacturer to draw up and sign a legally binding EU Declaration of Conformity (EU-DoC) before placing the product on the market

**Governing standard / law:** ISO/IEC 17050-1 and -2

> the EU legislation imposes an obligation on the manufacturer to draw up and sign a legally binding EU Declaration of Conformity (EU-DoC) before placing the product on the market

Source: <https://casco.iso.org/attestations-of-conformity.html>

EU Declaration of Conformity (EU-DoC) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** European Standard (EN)

**Market / system:** Europe

**Meaning:** A-deviations do not release CENELEC members from their obligation to implement the relevant European Standard

**Administered by:** CENELEC

> A-deviations do not release CENELEC members from their obligation to implement the relevant European Standard

Source: <https://boss.cenelec.eu/homegrowndeliverables/en/pages/adev/>

European Standard (EN) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Notified Body

**Market / system:** Europe

**Meaning:** For some categories of products, involvement of a third-party conformity assessment body is necessary

> For some categories of products, involvement of a third-party conformity assessment body

Source: <https://casco.iso.org/attestations-of-conformity.html>

Notified Body — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** CE Mark

**Market / system:** European Economic Area

**Meaning:** a manufacturer's declaration that the product meets these requirements

**Mandatory / voluntary:** Simple CE marking is allowed under a self-certification process if the risk level of a product is considered minimal

> The "Conformité Européenne" or CE Mark The <https://ec.europa.eu/growth/single-market/ce-marking_en> CE Mark was introduced nearly 30 years ago for certain products sold within the European Economic Area to show conformity with legal requirements in respect of relevant safety, health and environmental directives. The use of the CE logo is a manufacturer's declaration that the product meets these requirements but the logo may also include a four-digit code identifying the authorized third party (Notified Body) involved in assessing conformance. Simple CE marking is allowed under a self-certification process if the risk level of a product is considered minimal.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

CE Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex d / da / db / dc

**Meaning:** Flameproof

**Governing standard / law:** EN/IEC 60079-1

> Flameproof - Ex d / da / db / dc EN/IEC 60079-1

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex d / da / db / dc — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex e / eb / ec

**Meaning:** Increased Safety

**Governing standard / law:** EN/IEC 60079-7

> Increased Safety - Ex e / eb / ec EN/IEC 60079-7

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex e / eb / ec — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex i / ia / ib / ic

**Meaning:** Intrinsic Safety

**Governing standard / law:** EN/IEC 60079-11

> Intrinsic Safety - Ex i / ia / ib / ic EN/IEC 60079-11

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex i / ia / ib / ic — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex m / ma / mb / mc

**Governing standard / law:** EN/IEC 60079-18

> Encapsula on - Ex m / ma / mb / mc EN/IEC 60079-18

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex m / ma / mb / mc — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex nA / nC / nL

**Meaning:** Non Sparking

**Governing standard / law:** EN/IEC 60079-15

> Non Sparking - Ex nA / nC / nL EN/IEC 60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex nA / nC / nL — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex o / ob / oc

**Meaning:** Oil Immersion

**Governing standard / law:** EN/IEC 60079-6

> Oil Immersion - Ex o / ob / oc EN/IEC 60079-6

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex o / ob / oc — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex op is / op sh / op pr

**Governing standard / law:** EN/IEC 60079-28

> Op cal Radia on - Ex op is / op sh / op pr EN/IEC 60079-28

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex op is / op sh / op pr — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex p / pxb / pyb / pzc

**Meaning:** Purge/Pressurised

**Governing standard / law:** IEC 60079-2

> Purge/Pressurised - Ex p / pxb / pyb / pzc IEC 60079-2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex p / pxb / pyb / pzc — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex q / qb / qc

**Meaning:** Quartz/Sand Filled

**Governing standard / law:** EN/IEC 60079-5

> Quartz/Sand Filled - Ex q / qb / qc EN/IEC 60079-5

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex q / qb / qc — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Explosion-proof (XP)

**Stated equivalent:** Ex d (Flameproof)

**Meaning:** Contain the explosion inside the enclosure

**Governing standard / law:** IEC 60079-1

> Explosion-proof (XP) | Ex d (Flameproof) | IEC 60079-1 | Contain the explosion inside the enclosure

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Explosion-proof (XP) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** DIN EN 60950-1

**Market / system:** Germany

**Stated equivalent:** IEC 60950-1

> IEC 60950-1 consolidates the 2005 2nd edition of this standard with its first and second amendments (from 2009 and 2013 respectively). The standard is applicable to mains, or battery-powered information technology (IT) equipment and office machines with a rated voltage not exceeding 600 V. It is intended to prevent injury and damage to persons and property from such hazards as electric shock, fire, dangerous temperatures and mechanical instability. Note that in Germany this standard is also referenced as DIN EN 60950-1 and as VDE 0805.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

DIN EN 60950-1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** DIN Mark

**Market / system:** Germany

**Meaning:** certifying component compliance with DIN, EN, IEC and ISO product safety standards

**Administered by:** TUV Rheinland

> GS Mark and DIN Mark - Germany/EU Germany’s TUV standards agency operates the GS Mark (Geprüfte Sicherheit = tested safety) to show conformity with German’s Equipment and Product Safety Act (GPSG = Geräte- und Produktisicherheitgesetz). The GS Mark assures commercial buyers and consumers the product has been tested by an authorized institution such as TUV Rheinland. The DIN Mark is another marking scheme operated by TUV Rheinland certifying component compliance with DIN, EN, IEC and ISO product safety standards.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

DIN Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** GS Mark

**Market / system:** Germany

**Governing standard / law:** GPSG = Geräte- und Produktisicherheitgesetz

**Administered by:** TUV Rheinland

> Germany’s TUV standards agency operates the GS Mark (Geprüfte Sicherheit = tested safety) to show conformity with German’s Equipment and Product Safety Act (GPSG = Geräte- und Produktisicherheitgesetz). The GS Mark assures commercial buyers and consumers the product has been tested by an authorized institution such as TUV Rheinland.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

GS Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** VDE Mark

**Market / system:** Germany

**Meaning:** indicates conformity with the VDE standards, European or internationally harmonized standards and confirms compliance with protective requirements of the applicable EC Directive(s)

**Administered by:** VDE Testing and Certification Institute

> VDE Mark - Germany The <https://www.vde.com/en> VDE Testing and Certification Institute is another German-based independent testing organization for electric and electronic products. The VDE Mark indicates conformity with the VDE standards, European or internationally harmonized standards and confirms compliance with protective requirements of the applicable EC Directive(s).

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

VDE Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Group A

**Stated equivalent:** IIC

**Applies to:** Acetylene

> Acetylene Group A IIC

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Group A — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Group B

**Stated equivalent:** IIC

**Applies to:** Hydrogen

> Hydrogen Group B IIC

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Group B — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Group C

**Stated equivalent:** IIB

**Applies to:** Ethylene

> Ethylene Group C IIB

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Group C — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Group D

**Applies to:** Methane (mining)

> Methane (mining) Group D

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Group D — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Group D

**Stated equivalent:** IIA

**Applies to:** Propane

> Propane Group D IIA

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>


**Designation:** Group E

**Applies to:** Combustible Metal Dusts

> Combustible Metal Dusts Group E

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Group E — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Group F

**Applies to:** Class II

> Class II Group F

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Group F — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Hermetically sealed

**Stated equivalent:** Ex nC / Ex m

**Meaning:** Seal ignition source from atmosphere

**Governing standard / law:** IEC 60079-15 / -18

> Hermetically sealed | Ex nC / Ex m | IEC 60079-15 / -18 | Seal ignition source from atmosphere

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Hermetically sealed — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex d

**Market / system:** IEC / ATEX

**Meaning:** Flameproof enclosure

**Governing standard / law:** IEC 60079 series

> Ex d | Flameproof enclosure

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Ex d — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex e

**Market / system:** IEC / ATEX

**Meaning:** Increased safety

**Governing standard / law:** IEC 60079 series

> Ex e | Increased safety

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Ex e — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex i

**Market / system:** IEC / ATEX

**Meaning:** Intrinsic safety

**Governing standard / law:** IEC 60079 series

> Ex i | Intrinsic safety

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Ex i — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex m

**Market / system:** IEC / ATEX

**Meaning:** Encapsulation

**Governing standard / law:** IEC 60079 series

> Ex m | Encapsulation

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Ex m — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex p

**Market / system:** IEC / ATEX

**Meaning:** Pressurization

**Governing standard / law:** IEC 60079 series

> Ex p | Pressurization

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Ex p — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** IIA

**Market / system:** IEC / ATEX

**Applies to:** Propane

> IIA | Propane

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

IIA — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** IIB

**Market / system:** IEC / ATEX

**Applies to:** Ethylene

> IIB | Ethylene

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

IIB — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** IIC

**Market / system:** IEC / ATEX

**Applies to:** Hydrogen / acetylene

> IIC | Hydrogen / acetylene

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

IIC — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T1

**Market / system:** IEC / ATEX

**Applies to:** 450°C

> T1 | 450°C

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

T1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T2

**Market / system:** IEC / ATEX

**Applies to:** 300°C

> T2 | 300°C

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

T2 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T3

**Market / system:** IEC / ATEX

**Applies to:** 200°C

> T3 | 200°C

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

T3 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T4

**Market / system:** IEC / ATEX

**Applies to:** 135°C

> T4 | 135°C

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

T4 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T5

**Market / system:** IEC / ATEX

**Applies to:** 100°C

> T5 | 100°C

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

T5 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T6

**Market / system:** IEC / ATEX

**Applies to:** 85°C

> IEC / ATEX System | Continuous hazard | Class I Division 1 | Zone 0 | Frequent hazard | Class I Division 1 | Zone 1 | Occasional hazard | Class I Division 2 | Zone 2 | Zone systems offer more precise classification of hazard frequency , while the Class/Division system is simpler and historically used in North America. Gas Group Equivalency NEC Group | IEC Group | A (Acetylene) | IIC | B (Hydrogen) | IIC | C (Ethylene) | IIB | D (Propane) | IIA | Temperature Classes Electrical equipment must also be rated according to maximum surface temperature to prevent ignition. Temperature Class | Max Surface Temp | T1 | 450°C | T2 | 300°C | T3 | 200°C | T4 | 135°C | T5 | 100°C | T6 | 85°C |

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

T6 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 0

**Market / system:** IEC / ATEX

**Meaning:** Explosive atmosphere present continuously or for long periods

> Zone 0 | Explosive atmosphere present continuously or for long periods

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Zone 0 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 1

**Market / system:** IEC / ATEX

**Meaning:** Explosive atmosphere likely during normal operation

> Zone 1 | Explosive atmosphere likely during normal operation

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Zone 1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 2

**Market / system:** IEC / ATEX

**Meaning:** Explosive atmosphere unlikely in normal operation, only short duration eg. accidental leakage

> Zone 2 | Explosive atmosphere unlikely in normal operation, only short duration eg. accidental leakage

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Zone 2 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 20

**Market / system:** IEC / ATEX

**Meaning:** Combustible dust present continuously

> Zone 20 | Combustible dust present continuously

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Zone 20 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 21

**Market / system:** IEC / ATEX

**Meaning:** Dust likely during normal operation

> Zone 21 | Dust likely during normal operation

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Zone 21 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 22

**Market / system:** IEC / ATEX

**Meaning:** Dust unlikely except briefly

> Zone 22 | Dust unlikely except briefly

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Zone 22 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** IEC 62368-1

**Market / system:** IEC

**Meaning:** a unified replacement for the previous two standards

> As the distinctions between AV and ICT equipment become increasingly blurred with new technologies and markets, IEC 62368-1 is a unified replacement for the previous two standards.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

IEC 62368-1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** IECEx

**Meaning:** IECEx certificates are increasingly accepted as the basis for national approvals in both ATEX and non-ATEX countries

> IECEx as bridge: IECEx certificates are increasingly accepted as the basis for national approvals in both ATEX and non-ATEX countries, reducing duplicate testing. Over 30 countries accept IECEx directly.

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

IECEx — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Supplier's Declaration of Conformity (SDoC)

**Market / system:** International

**Meaning:** a type of conformity assessment that allows a supplier to make a first-party attestation that an object of conformity fulfils specified requirements

**Governing standard / law:** ISO/IEC 17050-1:2004

> SDoC is a type of conformity assessment that allows a supplier to make a first-party attestation that an object of conformity fulfils specified requirements

Source: <https://casco.iso.org/attestations-of-conformity.html>

Supplier's Declaration of Conformity (SDoC) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Intrinsically Safe (IS)

**Stated equivalent:** Ex i (Ex ia, Ex ib)

**Meaning:** Limit energy below ignition threshold

**Governing standard / law:** IEC 60079-11

> Intrinsically Safe (IS) | Ex i (Ex ia, Ex ib) | IEC 60079-11 | Limit energy below ignition threshold

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Intrinsically Safe (IS) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** PSE Mark

**Market / system:** Japan

**Governing standard / law:** Electrical Appliance and Material Safety Law (DENAN)

> The PSE Mark is used to show compliance with Japan's Electrical Appliance and Material Safety Law (DENAN) as applied to various classes of product and equipment.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

PSE Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** KC Mark

**Market / system:** Korea

**Governing standard / law:** Electrical Appliances and Materials Safety Control Law

**Administered by:** Agency for Technology and Standards (KATS)

> Korea's KC Mark is administered by its Agency for Technology and Standards (KATS) to show compliance for mandated products with the Electrical Appliances and Materials Safety Control Law. It replaced the original EK mark.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

KC Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** SIRIM

**Market / system:** Malaysia

**Governing standard / law:** Electricity Supply Act 1990

**Administered by:** SIRIM QAS International

> ST certification is required for switching power supplies to be imported independently or with a system into Malaysia per the Electricity Supply Act 1990. In addition to getting approval from ST, regulated products must also be tested and certified by SIRIM QAS International where they will receive the SIRIM label.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

SIRIM — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** NMX-J-521/1-ANCE

**Market / system:** Mexico

**Stated equivalent:** IEC 60335-1

> In North America, IEC 60335-1 has been used as the basis for a tri-national standard between the United States (UL 60335-1), Canada (CAN/CSA-C22.2 No. 60335-1), and Mexico (NMX-J-521/1-ANCE).

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

NMX-J-521/1-ANCE — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** NOM Mark

**Market / system:** Mexico

**Applies to:** household electrical appliances, IT, AV and similar equipment

**Administered by:** ANCE

> The NOM Mark identifies compliance with Mexico’s “Normas Oficiales Mexicanas” (NOM) safety standards for household electrical appliances, IT, AV and similar equipment. ANCE is an independent body authorized to grant NOM approval in electric and gas products.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

NOM Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 0

**Market / system:** NEC 500

**Meaning:** The most hazardous environments (continuous explosive atmosphere) have no direct NEC 500 equivalent

> Zone 0 gap: The most hazardous environments (continuous explosive atmosphere) have no direct NEC 500 equivalent. NEC 505 and IEC both define Zone 0, requiring EPL "a" equipment.

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>


**Designation:** A

**Market / system:** NEC

**Stated equivalent:** IIC

**Applies to:** Acetylene

> A (Acetylene) | IIC

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

A — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Division 1

**Market / system:** NEC and CEC

**Stated equivalent:** Zone 1 / Zone 21

> NEC and CEC* ATEX and IEC Deﬁnitions General CA Class II Division 1 & 2 US Class III Division 1 & 2 FM 3600 Con nuos A place in which an explosive atmosphere is Requirements Division 1 Zone 0 / Zone 20 CA Class III Division 1 & 2 hazard con nually present Ex US Zone 20, 21, 22 ISA 60079-0 Dust Igni on Proof (DIP) US Class II Division 1 UL 1203 Intermittent A place in which an explosive atmosphere is Division 1 CSA C22.2 No. 25 Division 1 Zone 1 / Zone 21

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Division 1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Division 1

**Market / system:** NEC and CEC

**Stated equivalent:** Zone 0 / Zone 20

> Type of Area NEC and CEC* ATEX and IEC Deﬁnitions General CA Class II Division 1 & 2 US Class III Division 1 & 2 FM 3600 Con nuos A place in which an explosive atmosphere is Requirements Division 1 Zone 0 / Zone 20

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>


**Designation:** Division 2

**Market / system:** NEC and CEC

**Stated equivalent:** Zone 2 / Zone 22

> NEC and CEC* ATEX and IEC Deﬁnitions General CA Class II Division 1 & 2 US Class III Division 1 & 2 FM 3600 Con nuos A place in which an explosive atmosphere is Requirements Division 1 Zone 0 / Zone 20 CA Class III Division 1 & 2 hazard con nually present Ex US Zone 20, 21, 22 ISA 60079-0 Dust Igni on Proof (DIP) US Class II Division 1 UL 1203 Intermittent A place in which an explosive atmosphere is Division 1 CSA C22.2 No. 25 Division 1 Zone 1 / Zone 21 CA Class II hazard likely to occur in normal opera on Dust Protected (NI) US Class II Division 2 ISA 12.12.01 / FM 3611 Hazard under A place in which an explosive atmosphere is CA Class II Division 2 CSA C22.2 No. 25 abnormal Division 2 Zone 2 / Zone 22

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Division 2 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** B

**Market / system:** NEC

**Stated equivalent:** IIC

**Applies to:** Hydrogen

> B (Hydrogen) | IIC

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

B — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** C

**Market / system:** NEC

**Stated equivalent:** IIB

**Applies to:** Ethylene

> C (Ethylene) | IIB

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

C — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Class I Division 1

**Market / system:** NEC

**Stated equivalent:** Zone 1

**Meaning:** Frequent hazard

> Frequent hazard | Class I Division 1 | Zone 1

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Class I Division 1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Class I Division 1

**Market / system:** NEC

**Stated equivalent:** Zone 0

**Meaning:** Continuous hazard

> Continuous hazard | Class I Division 1 | Zone 0

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>


**Designation:** Class I Division 2

**Market / system:** NEC

**Stated equivalent:** Zone 2

**Meaning:** Occasional hazard

> Occasional hazard | Class I Division 2 | Zone 2

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Class I Division 2 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Class I

**Market / system:** NEC

**Meaning:** Flammable gases and vapors

> Class I | Flammable gases and vapors

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Class I — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Class II

**Market / system:** NEC

**Meaning:** Combustible dust

> Class II | Combustible dust

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Class II — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Class III

**Market / system:** NEC

**Meaning:** Ignitable fibers

> Class III | Ignitable fibers

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

Class III — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** D

**Market / system:** NEC

**Stated equivalent:** IIA

**Applies to:** Propane

> D (Propane) | IIA

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

D — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Division 1

**Market / system:** NEC

**Meaning:** Hazard present during normal operation

> Division 1 | Hazard present during normal operation

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>


**Designation:** Division 2

**Market / system:** NEC

**Meaning:** Hazard present only under abnormal conditions

> Division 2 | Hazard present only under abnormal conditions

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>


**Designation:** E

**Market / system:** NEC

**Applies to:** Metal dust

> E | Metal dust

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

E — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** F

**Market / system:** NEC

**Applies to:** Carbon dust

> F | Carbon dust

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

F — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** G

**Market / system:** NEC

**Applies to:** Grain / flour dust

> G | Grain / flour dust

Source: <https://www.inframena.com/hazardous-area-classification-equivalency-guide/>

G — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Supplier's declaration of conformity

**Market / system:** New Zealand

**Meaning:** required before placing on the market any low voltage or extra-low voltage fittings or appliances that have been declared as medium risk by the regulator

**Governing standard / law:** Electricity (Safety) Regulations 2010

> Under the Electricity (Safety) Regulations 2010, a supplier’s declaration of conformity is required before placing on the market any low voltage or extra-low voltage fittings or appliances that have been declared as medium risk by the regulator

Source: <https://casco.iso.org/attestations-of-conformity.html>

Supplier's declaration of conformity — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Non-incendive

**Stated equivalent:** Ex nA / Ex ec

**Meaning:** Normal operation cannot cause ignition

**Governing standard / law:** IEC 60079-15 / -7

> Non-incendive | Ex nA / Ex ec | IEC 60079-15 / -7 | Normal operation cannot cause ignition

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Non-incendive — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Nemko Mark

**Market / system:** Norway

**Meaning:** signifies that Nemko has tested or certified the product according to national standards in Norway

**Administered by:** Nemko

> Nemko Mark - Norway Nemko is an organization similar to TUV or UL that offers product safety testing and certification to worldwide standards. Its direct services cover IT/AV, household and telecoms products but extends to other sectors such as medical equipment, and the oil and gas industry. The mark itself signifies that Nemko has tested or certified the product according to national standards in Norway.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

Nemko Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Purged/Pressurized

**Stated equivalent:** Ex p (Ex px, Ex py, Ex pz)

**Meaning:** Maintain positive pressure with inert gas

**Governing standard / law:** IEC 60079-2

> Purged/Pressurized | Ex p (Ex px, Ex py, Ex pz) | IEC 60079-2 | Maintain positive pressure with inert gas

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Purged/Pressurized — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** EAC

**Market / system:** Russia

**Meaning:** used to indicate products that meet all of the technical requirements of the Eurasian Customs Union

> EAC Mark - Russia The Eurasian Conformity (EAC) mark has replaced the previous GOST-R and PCT national certification standards and marks. This mark is used to indicate products that meet all of the technical requirements of the Eurasian Customs Union.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

EAC — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** SAFETY Mark

**Market / system:** Singapore

**Administered by:** Productivity and Standards Board (PSB)

**Mandatory / voluntary:** requires all controlled goods to be individually marked

> Singapore's safety authority, the Productivity and Standards Board (PSB), requires all controlled goods to be individually marked with the SAFETY Mark.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

SAFETY Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T1

**Stated equivalent:** T1

**Applies to:** 450º C (842ºF)

> 450º C (842ºF) T1 T1 T1

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T2

**Applies to:** 300º C (572ºF)

> 300º C (572ºF) T2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T2 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T2A

**Applies to:** 280º C (536ºF)

> 280º C (536ºF) T2A

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T2A — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T2B

**Stated equivalent:** T2

**Applies to:** 260º C (500ºF)

> 260º C (500ºF) T2B T2 T2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T2B — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T2C

**Applies to:** 230º C (446ºF)

> 230º C (446ºF) T2C

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T2C — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T2D

**Applies to:** 215º C (419ºF)

> 215º C (419ºF) T2D

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T2D — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T3

**Applies to:** 200º C (392ºF)

> 200º C (392ºF) T3

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T3 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T3A

**Applies to:** 180º C (356ºF)

> 180º C (356ºF) T3A

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T3A — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T3B

**Applies to:** 165º C (329ºF)

> 165º C (329ºF) T3B

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T3B — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T3C

**Applies to:** 160º C (320ºF)

> 160º C (320ºF) T3C

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T3C — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T4

**Applies to:** 135º C (275ºF)

> 135º C (275ºF) T4

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T4 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T4A

**Applies to:** 120º C (248ºF)

> 120º C (248ºF) T4A

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T4A — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T5

**Stated equivalent:** T5

**Applies to:** 100º C (212ºF)

> 100º C (212ºF) T5 T5 T5

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T5 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** T6

**Stated equivalent:** T6

**Applies to:** 85º C (185ºF)

> 85º C (185ºF) T6 T6 T6

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

T6 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** ta / tb / tc

**Meaning:** Enclosure

**Governing standard / law:** EN/IEC 60079-31

> Enclosure - ta / tb / tc EN/IEC 60079-31

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

ta / tb / tc — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** BSMI

**Market / system:** Taiwan

**Applies to:** ITE and audio/ video products

**Administered by:** Bureau of Standards, Metrology and Inspection

> The BSMI (Bureau of Standards, Metrology and Inspection) Certification is the approval scheme for ITE and audio/ video products in Taiwan.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

BSMI — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** BS EN IEC 60335

**Market / system:** UK

**Stated equivalent:** IEC 60335

**Meaning:** Identical adoption ensures UK manufacturers meet both European and international safety expectations

**Applies to:** Safety rules for household appliances

> Identical adoption ensures UK manufacturers meet both European and international safety expectations

Source: <https://knowledge.bsigroup.com/articles/just-how-identical-are-identical-standards>

BS EN IEC 60335 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** BS EN ISO 14001:2015

**Market / system:** UK

**Stated equivalent:** ISO 14001

**Meaning:** Identical adoption ensures UK businesses comply with international and European requirements

**Applies to:** Environmental management

> Identical adoption ensures UK businesses comply with international and European requirements

Source: <https://knowledge.bsigroup.com/articles/just-how-identical-are-identical-standards>

BS EN ISO 14001:2015 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** BS EN ISO 9001

**Market / system:** UK

**Stated equivalent:** ISO 9001

**Meaning:** if you're compliant with BS EN ISO 9001 in the UK, it's equal to compliance with both ISO 9001 internationally and EN ISO 9001 in Europe

> ISO 9001 on quality management systems is adopted in Europe as EN ISO 9001, and in the UK as BS EN ISO 9001.

Source: <https://knowledge.bsigroup.com/articles/just-how-identical-are-identical-standards>

BS EN ISO 9001 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** BSI Kitemark

**Market / system:** UK

**Administered by:** British Standards Institution (BSI)

**Mandatory / voluntary:** voluntary certification mark

> BSI Kitemark - UK The <https://www.bsigroup.com/> British Standards Institution (BSI) was the world's first national standards body and continues to be a leading global standards maker. BSI is also the UK's National Standards Body, representing UK interests worldwide. The BSI Kitemark is a voluntary certification mark, globally recognized as a symbol of trust, that shows a product or service meets applicable and appropriate British, European, International and other standards for quality, safety, performance and trust.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

BSI Kitemark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** UL Mark

**Meaning:** tested and determined that a product meets UL specified product safety requirements

**Administered by:** Underwriters Laboratories

> UL Mark indicates that either Underwriters Laboratories or an equivalent nationally recognized testing laboratory (NRTL) has tested and determined that a product meets UL specified product safety requirements.

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

UL Mark — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** UL 60335-1

**Market / system:** United States

**Stated equivalent:** IEC 60335-1

> In North America, IEC 60335-1 has been used as the basis for a tri-national standard between the United States (UL 60335-1), Canada (CAN/CSA-C22.2 No. 60335-1), and Mexico (NMX-J-521/1-ANCE).

Source: <https://www.belfuse.com/resource-library/tech-paper/power-supply-safety-standards-agencies-and-marks>

UL 60335-1 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx d

**Market / system:** US

**Stated equivalent:** Zone 1

**Meaning:** Flame Proof

**Applies to:** Class I

**Governing standard / law:** ISA 60079-1

> Flame Proof AEx d US Class I Zone 1 ISA 60079-1

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx d — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx e

**Market / system:** US

**Stated equivalent:** Zone 1

**Meaning:** Increased Safety

**Applies to:** Class I

**Governing standard / law:** ISA 60079-7

> Increased Safety AEx e US Class I Zone 1 ISA 60079-7

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx e — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx ia

**Market / system:** US

**Stated equivalent:** Zone 0

**Meaning:** Intrinsic Safety

**Applies to:** Class I

**Governing standard / law:** ISA 60079-11

> Intrinsic Safety AEx ia US Class I Zone 0 ISA 60079-11

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx ia — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx iaD

**Market / system:** US

**Stated equivalent:** Zone 20

**Governing standard / law:** ISA 61241-11

> AEx iaD US Zone 20 ISA 61241-11

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx iaD — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx ib

**Market / system:** US

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** ISA 60079-11

> AEx ib US Class I Zone 1 ISA 60079-11

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx ib — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx ibD

**Market / system:** US

**Stated equivalent:** Zone 21

**Governing standard / law:** ISA 61241-11

> AEx ibD US Zone 21 ISA 61241-11

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx ibD — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx m

**Market / system:** US

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** ISA 60079-18

> AEx m US Class I Zone 1 ISA 60079-18

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx m — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx ma

**Market / system:** US

**Stated equivalent:** Zone 0

**Applies to:** Class I

**Governing standard / law:** ISA 60079-18

> AEx ma US Class I Zone 0 ISA 60079-18

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx ma — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx mb

**Market / system:** US

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** ISA 60079-18

> AEx mb US Class I Zone 1 ISA 60079-18

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx mb — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx mbD

**Market / system:** US

**Stated equivalent:** Zone 21

**Governing standard / law:** ISA 61241-18

> AEx mbD US Zone 21 ISA 61241-18

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx mbD — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx nA

**Market / system:** US

**Stated equivalent:** Zone 2

**Applies to:** Class I

**Governing standard / law:** ISA 60079-15

> AEx nA US Class I Zone 2 ISA 60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx nA — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx nC

**Market / system:** US

**Stated equivalent:** Zone 2

**Meaning:** Limited Energy

**Applies to:** Class I

**Governing standard / law:** ISA 60079-15

> Limited Energy AEx nC US Class I Zone 2 ISA 60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx nC — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx nC

**Market / system:** US

**Stated equivalent:** Zone 2

**Meaning:** Enclosed Break

**Applies to:** Class I

**Governing standard / law:** ISA 60079-15

> Enclosed Break AEx nC US Class I Zone 2 ISA 60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>


**Designation:** AEx nR

**Market / system:** US

**Stated equivalent:** Zone 2

**Applies to:** Class I

**Governing standard / law:** ISA 60079-15

> Restricted AEx nR US Class I Zone 2 ISA 60079-15

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx nR — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx o

**Market / system:** US

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** ISA 60079-6

> Oil Emmersion AEx o US Class I Zone 1 ISA 60079-6

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx o — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx pD

**Market / system:** US

**Stated equivalent:** Zone 21

**Governing standard / law:** ISA 61241-2

> AEx pD US Zone 21 ISA 61241-2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx pD — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx px

**Market / system:** US

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** ISA 60079-2

> AEx px US Class I Zone 1 ISA 60079-2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx px — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx py

**Market / system:** US

**Stated equivalent:** Zone 1

**Applies to:** Class I

**Governing standard / law:** ISA 60079-2

> AEx py US Class I Zone 1 ISA 60079-2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx py — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx pz

**Market / system:** US

**Stated equivalent:** Zone 2

**Applies to:** Class I

**Governing standard / law:** ISA 60079-2

> AEx pz US Class I Zone 2 ISA 60079-2

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx pz — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx q

**Market / system:** US

**Stated equivalent:** Zone 1

**Meaning:** Power Filled

**Applies to:** Class I

**Governing standard / law:** ISA 60079-5

> Power Filled AEx q US Class I Zone 1 ISA 60079-5

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx q — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** AEx tD

**Market / system:** US

**Stated equivalent:** Zone 21

**Governing standard / law:** ISA 60079-31

> AEx tD US Zone 21 ISA 60079-31

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

AEx tD — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** ATEX/IECEx certification

**Market / system:** US

**Meaning:** not recognized in the US or Canada

> ATEX/IECEx certification is not recognized in the US or Canada.

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

ATEX/IECEx certification — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Declaration of Conformity

**Market / system:** US

**Meaning:** the U.S. Federal Communications Commission (FCC) has adopted a rule that permits recognition of SDoC (also sometimes called Self Declaration of Conformity) for certain information technology devices

**Administered by:** Federal Communications Commission (FCC)

> the U.S. Federal Communications Commission (FCC) has adopted a rule that permits recognition of SDoC (also sometimes called Self Declaration of Conformity) for certain information technology devices

Source: <https://casco.iso.org/attestations-of-conformity.html>

Declaration of Conformity — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (DIP)

**Market / system:** US

**Stated equivalent:** Division 1

**Applies to:** Class II

**Governing standard / law:** UL 1203

> (DIP) US Class II Division 1 UL 1203

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(DIP) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Ex

**Market / system:** US

**Stated equivalent:** Zone 20, 21, 22

**Governing standard / law:** ISA 60079-0

> Ex US Zone 20, 21, 22 ISA 60079-0

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Ex — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** FCC Certification

**Market / system:** US

**Meaning:** any intentional radiator — a device designed to transmit RF for communication purposes, including Wi-Fi, Bluetooth, LTE, Zigbee, and similar protocols — must obtain FCC Certification through an accredited Telecommunications Certification Body (TCB) before it can be marketed in the US

**Governing standard / law:** 47 CFR § 15.201

**Administered by:** Telecommunications Certification Body (TCB)

**Mandatory / voluntary:** non-negotiable for anything with a wireless stack

> any intentional radiator — a device designed to transmit RF for communication purposes, including Wi-Fi, Bluetooth, LTE, Zigbee, and similar protocols — must obtain FCC Certification through an accredited Telecommunications Certification Body (TCB) before it can be marketed in the US

Source: <https://blog.promise.legal/fcc-certification-ce-marking-connected-devices-hardware-startups/>

FCC Certification — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (IS)

**Market / system:** US

**Stated equivalent:** Division 1

**Applies to:** Class II

**Governing standard / law:** UL 913 / FM 3610

> (IS) US Class II Division 1 UL 913 / FM 3610

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(IS) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (IS)

**Market / system:** US

**Stated equivalent:** Division 1

**Applies to:** Class III

**Governing standard / law:** UL 913 / FM 3610

> (IS) US Class III Division 1 UL 913 / FM 3610

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>


**Designation:** (IS)

**Market / system:** US

**Stated equivalent:** Division 1

**Applies to:** Class I

**Governing standard / law:** UL 913 / FM 3610

> (IS) US Class I Division 1 UL 913 / FM 3610

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>


**Designation:** NEC 505

**Market / system:** US

**Meaning:** NEC 505 (Zone-based) is accepted in the US and provides easier mapping from IEC zones

> NEC 505 (Zone-based) is accepted in the US and provides easier mapping from IEC zones

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

NEC 505 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (NI)

**Market / system:** US

**Stated equivalent:** Division 2

**Meaning:** Dust Protected

**Applies to:** Class II

**Governing standard / law:** ISA 12.12.01 / FM 3611

> Dust Protected (NI) US Class II Division 2 ISA 12.12.01 / FM 3611

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(NI) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (NI)

**Market / system:** US

**Stated equivalent:** Division 2

**Meaning:** Non-Incendive

**Applies to:** Class I

**Governing standard / law:** ISA 12.12.01/FM 3611

> Non-Incendive (NI) US Class I Division 2 ISA 12.12.01/FM 3611

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>


**Designation:** (PX)

**Market / system:** US

**Stated equivalent:** Division 1

**Applies to:** Class II

**Governing standard / law:** NFPA 496 (FM 3620)

> (PX) US Class II Division 1 NFPA 496 (FM 3620)

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(PX) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** (PZ)

**Market / system:** US

**Stated equivalent:** Division 2

**Applies to:** Class II

**Governing standard / law:** NFPA 496 (FM 3620)

> (PZ) US Class II Division 2 NFPA 496 (FM 3620)

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(PZ) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Supplier's Declaration of Conformity (SDoC)

**Market / system:** US

**Meaning:** a self-certification path under which the manufacturer tests to FCC limits internally and publishes a declaration

**Applies to:** unintentional radiator

**Administered by:** Federal Communications Commission (FCC)

> a self-certification path under which the manufacturer tests to FCC limits internally and publishes a declaration

Source: <https://blog.promise.legal/fcc-certification-ce-marking-connected-devices-hardware-startups/>

Supplier's Declaration of Conformity (SDoC) — Certification marks and hazardous-area classifications: cross-market equivalences

administered_by, applies_to, designation, market_or_system


**Designation:** Type X

**Market / system:** US

**Stated equivalent:** Division 1

**Applies to:** Class I

**Governing standard / law:** NFPA 496 (FM 3620)

> Type X US Class I Division 1 NFPA 496 (FM 3620)

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Type X — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Type Y

**Market / system:** US

**Stated equivalent:** Division 1

**Applies to:** Class I

**Governing standard / law:** NFPA 496 (FM 3620)

> Type Y US Class I Division 1 NFPA 496 (FM 3620)

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Type Y — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Type Z

**Market / system:** US

**Stated equivalent:** Division 2

**Applies to:** Class I

**Governing standard / law:** NFPA 496 (FM 3620)

> Type Z US Class I Division 2 NFPA 496 (FM 3620)

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

Type Z — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** UL standard

**Market / system:** US

**Meaning:** a published set of best practices for testing and evaluating the safety, security, and sustainability of a product or system

**Administered by:** UL Standards & Engagement

**Mandatory / voluntary:** Standards are voluntary but can become mandatory and legally binding if referenced in adopted code, written into law, or required by a government agency like the U.S. Consumer Product Safety Commission

> Standards are voluntary but can become mandatory and legally binding if referenced in adopted code, written into law, or required by a government agency like the U.S. Consumer Product Safety Commission

Source: <https://ulse.org/standards/>

UL standard — Certification marks and hazardous-area classifications: cross-market equivalences

administered_by, designation, market_or_system, meaning


**Designation:** (XP)

**Market / system:** US

**Stated equivalent:** Division 1

**Meaning:** Explosion Proof

**Applies to:** Class I

**Governing standard / law:** UL 1203

> Explosion Proof (XP) US Class I Division 1 UL 1203

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>

(XP) — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 0

**Meaning:** Explosive atmosphere continuously or for long periods (>1000 hrs/yr)

> Zone 0 | Explosive atmosphere continuously or for long periods (>1000 hrs/yr)

Source: <https://exknowledge.com/pages/nec-500-vs-atex-iec.html>

Zone 0 — Certification marks and hazardous-area classifications: cross-market equivalences


**Designation:** Zone 0

**Stated equivalent:** 1G

> Zone 0 1G Ga

Source: <https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf>