This European Standard applies to multicore cables insulated and sheathed with heat resistant crosslinked silicone rubber. Types with or without an overall textile braid, and with or without a strain-bearing element, are included. The cables are of rated voltages U0/U 300/500 V. The cables are intended for use within high temperature zones, either: - in fixed installations with mechanical protection (cables to 4.1); or - for flexible use under low mechanical stress (cables to 4.2). The maximum conductor operating temperature for each of the cables in this standard is 180 °C. NOTEHD 516 contains extensive guidance on the safe use of cables in this standard. This EN 50525-2-83 should be read in conjunction with EN 50525-1, which specifies general requirements.