Technical data

324 • Use in Hazardous Environments
Classifications Meeting the NEC 500
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
9.4.3 Temperature Classes
Electrical components for explosive areas are differentiated by temperature
classes:
Tab. 9-8: Temperature Classes
Temperature
classes
Maximum permissible surface
temperature of the equipment
Ignition temperature
of the combustible materials
T1 450 °C > 450 °C
T2 300 °C > 300 °C to 450 °C
T2A 280 °C > 280 °C to 300 °C
T2B 260 °C > 260 °C to 280 °C
T2C 230 °C >230 °C to 260 °C
T2D 215 °C >215 °C to 230 °C
T3 200 °C >200 °C to 215 °C
T3A 180 °C >180 °C to 200 °C
T3B 165 °C >165 °C to 180 °C
T3C 160 °C >160 °C to 165 °C
T4 135 °C >135 °C to 160 °C
T4A 120 °C >120 °C to 135 °C
T5 100 °C >100 °C to 120 °C
T6 85 °C > 85 °C to 100 °C