These double screened control and connecting cables with twisted pairs (TP)~(PF:pair form) are especially used for EIA RS-485 applications, computer systems, the transmission of analogue and digital signals in processor-controlled equipments. It provides low capacitance with PE insulation and transmits the datas at longer distances. And also above it double overall screen provides more protection against external electrical interferences. These cables are used for indoor applications, not intended for outdoor or under ground installation.