Temperature Classes - WAGO -I/O-SYSTEM 750 Technical Description, Installation And Configuration

222 • Use in Hazardous Environments
Classifications meeting the NEC 500

6.4.3 Temperature classes

Electrical components for explosive areas are differentiated by temperature
classes:
Temperature classes
T1
T2
T2A
T2B
T2C
T2D
T3
T3A
T3B
T3C
T4
T4A
T5
T6
Maximum
surface temperature
450 °C
300 °C
280 °C
260 °C
230 °C
215 °C
200 °C
180 °C
165 °C
160 °C
135 °C
120 °C
100 °C
85 °C
Ignition temperature
of the combustible materials
> 450 °C
> 300 °C to 450 °C
> 280 °C to 300 °C
> 260 °C to 280 °C
>230 °C to 260 °C
>215 °C to 230 °C
>200 °C to 215 °C
>180 °C to 200 °C
>165 °C to 180 °C
>160 °C to 165 °C
>135 °C to 160 °C
>120 °C to 135 °C
>100 °C to 120 °C
> 85 °C to 100 °C
WAGO-I/O-SYSTEM 750
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