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5
NEC/CEC STANDARDS
operate across the U.S.,
Canada, the Middle East
and various locations across
the globe. NEC code is
reviewed and updated in
three year cycles.  e CEC
code is updated regularly
through their 9,000
members and its active
involvement with the IEC.
NEC/CEC
NATIONAL ELECTRICAL CODE/CANADIAN ELECTRICAL CODE (NEC/CEC)
 e NEC has been the standard for electrical wiring and equipment installations in the United States since 1897.
 e CEC began in 1927 and provides the electrical product standards for Canada. NEC/CEC Code categorizes
hazardous locations into Classes, Divisions and Groups. Classes I, II and III de ne hazards into gases and vapors,
combustible dusts, and  bers and  yings, respectively. Divisions further break down the Classes by the amount of
the exposure to the combustible. Division 1 establishes locations where hazards are present during regular operations.
Division 2 locations are where hazards are encountered only during an abnormal situation, such as equipment
failure or a spill. Gas groups classify the explosive nature of the gas, vapor or dust when ignited.
US (NEC 500) and CA (CEC Annex J) EU (Directive 94/9/EC) - ATEX
Explosionproof with I.S. Outputs, Class I,
Division 1, Groups A, B, C, D, T5
Type of Protection
(optional except for I.S.)
Temperature Class
(T5 and T6 optional)
Permitted Division
(optional except for Division 2)
Permitted Gas Group
Permitted Class
Product Marking Charts 
US (NEC 505)
Class I, Zone 1, AEx d [ia] IIC T5
Permitted Class
Permitted Zone
American
National Standard
Explosion-Protected
Type of
Protection
I.S. Output
Group
Gas Group
Temperature Class
IEC and CA (CEC Section 18)
Ex d [ia] IIC T5
Explosion-Protected
I.S. Output
Type of Protection
Group
Gas Group
Temperature
Class
Ex d [ia] IIC T5
European
Standard
Type of Protection
I.S. Output
Group
Gas Group
Temperature Class
Explosion-Protected
0081 II 2 G
CE Conformity Marking
Identifi cation Number of Notifi ed Body
Involved in Protection Control Stage
Explosion-Protection
Marking
Equipment Group:
I (for mines)
II (for other than mines)
Category:
1 (for Zone 0 or 20)
2 (for Zone 1 or 21)
3 (for Zone 2 or 22)
Type of Explosive Atmosphere:
G (for gas, vapor and mist)
D (for dust)


Certifications and performance
markings are displayed on all
electrical equipment to ensure
proper conformity to each
hazardous location’s requirements.
Appleton offers products approved
for ATEX, IEC, NEC and CEC
locations.
 Ambient temperature ranges other than standard -20 °C ≤ Ta ≤ +40 °C (-4 °F ≤ Ta ≤ +104 °F ) must be marked.