LST HD 21.1 S4-2003LST HD 21.1 S4-2003/P-2005LST HD 22.1 S4-2003/P-2005LST HD 22.1 S4-2003
LST EN 50525-1-2011 history
2011LST EN 50525-1-2011 Electric cables - Low voltage energy cables of rated voltages up to and including 450/750 V (U0/U) -- Part 1: General requirements