Public buildings such as airports or train stations, plant engineering, mechanical engineering, heating and air conditioning technology, event technology, especially where in the event of a fire both people, animals and valuable material assets are at high risk from the consequences of the fire, suitable for torsion applications that are typical in the loop of wind turbines, easy to handle and install due to very flexible design, wide range of applications due to excellent product properties, fine-wire strand made of bare copper wires, core insulation: halogen-free, sheath: halogen-free special mixture, grey (similar to RAL 7001), based on IEC 60227-5 and EN 50525-2-51, based on EN 50525-3-11, flame-retardant according to IEC 60332-1-2 (flame spread on a cable), no fire propagation according to IEC 60332-3-24 or IEC 60332-3-25 (flame spread on vertical cable or core bundles), halogen-free according to IEC 60754-1 (proportion of gases containing halogen acid), corrosiveness of the fire gases according to IEC 60754-2 (acidity level), low smoke density according to IEC 61034-2, oil-resistant according to EN 50363-4-1 (TM5) and UL OIL RES I and OIL RES II, ozone-resistant according to EN 50396