Halogen-free individual wires with low development of smoke and corrosive gases in the event of a fire are used for installation purposes in dry rooms for wiring lights and devices wherever high property needs to be protected from consequential damage in the event of a fire. They may also be installed in pipes on, in and under plaster, as well as in closed systems. H07Z-K, suitable for protected fixed installation in or on lighting systems or switching and control devices up to 1000 V AC voltage or up to 750 V DC voltage to earth.