surface
temperatur (°C)
Temperature class
CENELEC
Temperature class
NEC 500-3
450 T1
300 T2
280 T2A
260 T2B
230 T2C
215 T2D
200 T3
180 T3A
165 T3B
160 T3C
135 T4
120 T4A
100 T5
85 T6
W
Technicalappendix
W. In
these countries, the directive refers
to the sale and commissioning of
products which have been designed
particularly for high explosion risk
environments (where explosive
atmospheres exist due gases,
vapours, mists, dusts).) CENELEC NEC 500
Propane IIA D
Ethylene IIB C
Hydrogen IIC B
Acetylene IIC A
Methane (mining) mining (MSHA)
Temperature classes
Max.28 1282250000 2012/2013
.g. now also
covers the mining sector and purely
mechanical devices.
This directive one the “New-
Approach” directives.
General requirements 60079-0 60079-0 –
Oil immersion 60079-6 60079-6 2
Pressurised apparatus 60079-2 60079-2 2
Powder filling 60079-5 60079-5 2
Flameproof enclosure 60079-1 60079-1 2
Increased safety 60079-7 60079-7 2
Intrinsic safety 60079-11 60079-11 1
Intrinsic safety 60079-11 60079-11 2
Intrinsic safety 60079-11 60079-11 3
Type (Ex 60079-15 60079-15 3
Encapsulation 60079-18 60079-18 2
Classification for potentially explosive areas
CENELEC
classification
IEC60079-10
Presence potentially
explosive atmosphere
Product
category
US classification
NEC 500
Combustible
media
Zone permanent, long-term Class Div Gases, Vapours
Zone frequently Class II, Div Dust
Zone occasionally Class Div Gases, Vapours
Zone Class II, Div Dust
Zone rarely and Class Div Gases, Vapours
Zone briefly Class II, Div Dust
Explosion groups
Gas (e.ATEX directives
ATEX directives
Since July 2003, all new facilities in
explosion risk zones must certified
according ATEX Directive 94/9/
EG ATEX (ATEX: ATmosphère
EXplosive explosive atmosphere).
Class protection
Type protection Code CENELEC IEC Product category
explosion protect. valid all
European Union countries, well as
Iceland, Lichtenstein and Norway
