DS DSEN 50525-3-21 2011-JUN-24 Electrc cables - Low voltage energy cables of rated voltages up to and ncludng 450750 V U0U - Part 3-21 Cables wth specal fre performance - Flexble cables wth halogen-free crosslnked nsulaton and low emsson of smoke
EN 50525-3-21 applies to flexible cables, insulated and sheathed with halogen-free crosslinked compound and having low emission of smoke and corrosive gases when exposed to fire.NOTE 1 Low emission of smoke is checked in accordance with EN 61034-2. Low emission of corrosive gases is checked as part of the check for absence of halogens (see Annex B of EN 50525-1).The cables are of rated voltage U0/U 450/750 V.The cables are intended for the connection of equipment and machinery to the fixed supply.The maximum conductor operating temperature for each of the cables in this standard is 90 °C.NOTE 2 HD 516 contains extensive guidance on the safe use of cables in this standard.This EN 50525-3-21 should be read in conjunction with EN 50525-1, which specifies general requirements.
