Internal wiring of devices, protected installation in and on luminaires, signalling systems on and under plaster in pipes, The marking on cables and wires also stands for international recognition of test markings/certifications of national certification institutes, e.g. in the form of . The marking is required for the movement of goods between European countries, Fine stranded copper conductor made of bare copper wires according to stranded conductor class 5 as per IEC 60228/ VDE 0295, PVC-based core insulation, type certification as per EN 50525-2-31/ VDE 0285-525-2-31, flame retardant as per IEC 60332-1-2, coil: d1=18mm; d2=200mm; w=85mm,