IEC 60332-1, IEC 60332-3, NF C 93 524, MIL W 22759/18 or 16. CAE KU03 ETFE Wire. The KU wire range are a flexible harmonised cable that can be used for interior wiring of medium-sized electrical appliances. Features & Benefits ; Acid, oil, hydrocarbon, solvent and mould resistant ; RoHS ; Flame and fire retardant