EN 60529 Degrees of Protection Provided by Enclosures (IP Code) (Incorporates Amendments A1: 2000 and A2: 2013)
EN 60909 Short-circuit currents in three-phase a.c systems - Part 3: Currents during two separate simultaneous line-to-earth short-circuits and partial short-circuit currents flowing through earth
IEC 60287-3-1 Electric cables — Calculation of the current rating — Part 3-1: Operating conditions — Site reference conditions*, 2017-06-08 Update
DIN EN 50522:2011 history
2011DIN EN 50522:2011 Earthing of power installations exceeding 1 kV a.c.; German version EN 50522:2010
0000 DIN EN 50522:2008
2000DIN VDE 0101:2000 Power installations exceeding 1 kV; German version HD 637 S1:1999