Pollution Degree (IEC 60664-1)

The equipment is classified into levels 1 to 4 according to contamination such as dust in the air in which the equipment is used, and the rated voltage is determined according to the spatial distance and creepage distance between metals that generate a potential difference.

Pollution degree is also called pollution degree. Please refer to the pollution degree page for the pollution degree classification from 1 to 4 and our response to the pollution degree.