: It uses Site Pollution Severity (SPS) classes (Very Light to Very Heavy) to determine the required creepage distance.
The standard forces you to consider . Instead of guessing, you categorize your pollution into 5 distinct classes (a to e): iec 60815-2 pdf
IEC 60815-2 standard, titled "Selection and dimensioning of high-voltage insulators intended for use in polluted conditions – Part 2: Glass and porcelain insulators," is a critical international technical document used to ensure the reliability of electrical power networks. It provides specific guidelines for choosing insulators that can withstand environmental contamination, which is one of the leading causes of flashovers and power outages. Core Objectives and Scope : It uses Site Pollution Severity (SPS) classes
