Faber kabel sheathed cable flame retardant cable nym j series grey faber kabel 020024 the faber kabel 020024 is a sheathed flame retardant cable and is ideal for installation in on or under plaster in dry damp or wet rooms as well as in walls and being laid in concrete the cable is supplied on reels of 50m and can also be installed outdoors if protected against direct sun irradiationthe grey coloured cable has a bare copper conductor with a pvc outer sheath and has a voltage rating