The plastic power line mainly uses extruded solid insulation layer, bias: the bias value of the extruded insulation thickness is the main mark of the performance of the degree of extrusion, and most of the product structure size and its bias value have clear rules in the specification. Lubrication: The outer surface of the extruded insulation layer requires lubrication, and shall not present poor quality problems of rough appearance, burning and impurities. Density: The cross section of the extruded insulation layer should be dense and robust, and there should be no visible pinholes and no bubbles. In order to guarantee the degree of forming and reduce the shape of the power line, the multi-core power line is generally required to twist it into a circle. The mechanism of stranding is similar to conductor stranding, because the stranding joint diameter is large, and most of them use non-torsion method. The technical requirements of the cable of the lamp string power line are as follows: first, the twisting and bending of the cable is caused by the abnormal insulated wire core turning over; The second is to avoid the insulation layer being scratched. Three core waterproof power cord. Most of the cable in the cable is also accompanied by the completion of two other processes: one is the filling, the guarantee of the cable after the cable is rounded and unchanged; One is lashing, and the cable core is not lax. Power line inner cover, in order to maintain the insulation core is not armor injury, the insulation layer needs to be properly maintained, the inner cover is divided into: extruded inner cover (isolation jacket) and wrapped inner cover (cushion). Wrapping pad instead of lashing tape is carried out simultaneously with the cabling process.

Power cable armouring, laying in the underground power line, the task can accept the inevitable positive pressure effect, can choose the inner steel tape armouring structure. The power line is laid in a place with both positive pressure effect and tension effect (such as water, vertical shaft or soil with large drop), and the structural type with internal steel wire armor should be selected. The outer sheath of the power line is the part of the structure that maintains the insulation layer of the power line to avoid the corrosion of the elements. The primary effect of the outer sheath is to improve the mechanical strength of the power line, prevent chemical erosion, moisture-proof, waterproof immersion, and prevent the power line from burning. According to the different requirements of the power line, the extruder should directly extrude the plastic sheathed RVVP1 copper core PVC insulation wound shielding PVC sheathed soft wire. RVV cable full name copper core polyvinyl chloride insulated polyvinyl chloride sheathed soft electrical RVV cable, also known as light PVC sheathed flexible wire, commonly known as soft sheathed wire, is a kind of sheathed wire. It is mainly used in power lines, control lines and signal transmission lines for electrical, instrumentation and electronic equipment and automation devices, and can be used in anti-theft alarm systems, building intercom systems, etc. According to the national standard power line color separation, more than two core twisted synthetic cable, the outer layer twisted direction is right, widely used in instruments, meters, building intercom, monitoring control installation. RVV cable is mainly used in medium and lamp series power lines, light mobile appliances, instruments, household appliances, power lighting and other flexible use places, can transmit control signals, can also transmit power signals, but also suitable for laying in the bridge and hose. This product has obtained the 3C and CE mark certification, in line with the requirements of the European Union unified harmonized standards, not only can be applied to the Chinese market, but also applicable to the European market.