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Halogen-free, flame retardant and self-extinguishing in case of fire. Smoke in the event of fire is limited, transparent (to facilitate evacuation) and not harmful to electronic equipment. Power cable for open fixed installation, indoors and outdoors, in pipes and ground water. Suitable in switchgear and potentially explosive areas. Can be plowed down when care is taken. The concentric screen gives increased personal safety for both the installer and the installation owners.