Equipment in group II (gas) is divided in ac-
cordance with the characteristics of the explo-
sive atmosphere for which it is intended.
Equipment in group II (gas)
Group Description
IIA Propane
IIB Ethylene
IIC Hydrogen
Equipment in group III (dust) is divided in ac-
cordance with the characteristics of the explo-
sive atmosphere for which it is intended.
Equipment in group II (dust)
Group Description
IIIA Combustible lint
IIIB Non-conductive dust
IIIC Conductive dust
Trucks for use in zone 1 are automatically ap-
proved for use in zone 2. Depending on the
zone classification, the operating and display
elements on the trucks may be enclosed in a
special housing. Gases and vapours are divi-
ded into temperature classes T1 to T6 and
permissible equipment surface temperatures
are defined.
Temperature classes
Temperature class Ignition temperature range Maximum surface temperature
T1 > 450°C 450°C
T2 > 300°C to 450°C 300°C
T3 > 200°C to 300°C 200°C
T4 > 135°C to 200°C 135°C
T5 > 100°C to 135°C 100°C
T6 > 85°C to 100°C 85°C
Commissioning
Commissioning is the initial intended use of
the truck.
The necessary steps for the commissioning
vary depending on the model and equipment
of the truck. These steps require preparatory
Foreword
1
Using the truck
22 56368011531 EN - 01/2021 - 05
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