IEC 60721-2-2:2012 presents fundamental properties, quantities for characterization, and a classification of environmental conditions dependent on precipitation and wind relevant for electrotechnical products. This second edition cancels and replaces the first edition, published in 1988, and constitutes a technical revision. The main changes with regard to the previous edition are as follows:
- subclause Precipitation: simplified,
- data not possible to validate are removed,
- subclause Wind: text rewritten,
- Table 1 simplified and aligned with definition used by [1],
- subclause Hail: data added,
- formula changed,
- formula for impact energy added,
- subclause Snow: text changed and aligned with definitions used by [1],
- Table 3 removed,
- subclause Normal rain: text has been modified and numeric values removed,
- subclause Driving rain: text has been modified and numeric values removed,
- subclause Formation of ice: text has been modified and numeric values removed,
- subclause Drifting snow: text added,
- subclause Wind force: formula changed,
- Figure 1 to 5 removed.