Halogen-free single-core wires are used for installation in dry environments for wiring up lighting fixtures and units where valuable assets are to be protected from further damage resulting from fire.

These cables may be used in closed installation ducts. The direct operating voltages is permitted up to 900 V against ground when they are used in railcoaches. For the inner wiring of switch boards and distributors these are to be used with an alternating nominal voltage up to 1000 V or a direct voltage up to 750 V against ground.