U1000 R2V/U1000 R02V 3*2.5 cables and 3G2.5 Copper Cables have detailed and comprehensive settings in terms of specification parameters, fully meeting the various needs of low-voltage power distribution systems.

The conductor specifications are clear. In the 3*2.5mm² specification, each core has a cross-sectional area of 2.5mm², while 3G2.5mm² emphasizes the consistency of the stranding method and specification of the cores. The conductor is made of high-purity copper with a purity of ≥99.9%, manufactured through a multi-strand precision stranding process. At 20℃, the DC resistance of the conductor is ≤7.41Ω/km, which is much lower than the industry standard, significantly reducing energy loss during power transmission and ensuring efficient current conduction. The conductivity of high-purity copper is ≥98% IACS, which can meet the power needs of various low-voltage electrical equipment.

Due to the adoption of the multi-strand precision stranding process, the conductor has excellent Flexibility, with a minimum bending radius of only 6 times the cable outer diameter (static). The outer diameter of 3*2.5mm² cable is about 9mm, with a static bending radius of 54mm; 3G2.5mm² is about 10mm, with a static bending radius of 60mm, which is convenient for easy laying in narrow spaces such as wall pipelines and equipment interiors in complex environments.

The insulation layer is made of high-quality polyvinyl chloride (PVC) material. After optimization with a special formula, its temperature resistance level reaches 70℃, and it can work stably for a long time in the ambient temperature range of -15℃ to 70℃. Its volume resistivity is ≥10¹³Ω·cm, and the dielectric loss tangent is ≤0.03 (at 20℃), with excellent insulation performance, which can effectively isolate the risk of leakage between cores. The insulation layer has passed relevant flame retardant tests, has self-extinguishing property when burning in open fire, and has low smoke density, meeting fire safety requirements.

The cable has a compact and reasonable structural design. Both U1000 R2V and U1000 R02V models have a 3-core structure, adapting to the three-phase low-voltage power distribution system. The sheath layer is made of weather-resistant PVC material with a thickness of ≥0.8mm, a tensile strength of ≥12MPa, and an elongation at break of ≥150%, which can effectively resist the impact of external factors such as mechanical shock, wear and ultraviolet radiation. The rated voltage of the cable is 1000V, which accurately matches the voltage requirements of the low-voltage power distribution system.

In terms of current-carrying capacity, both cables perform excellently. When laid in air, the current-carrying capacity is about 28A; when laid underground, it is about 35A, which can meet the power supply of household lighting, small air conditioners, office equipment and light industrial machinery.

U1000 R2V/U1000 R02V 3*2.5 cables and 3G2.5 Copper Cables have distinct uses in multiple fields due to their excellent performance.

In the field of family residences, these two cables are ideal for indoor wiring. They are indispensable for connecting socket circuits and lighting systems in living rooms and bedrooms, providing stable power for home appliances such as TVs, refrigerators and lamps. Since their current-carrying capacity can meet the electricity demand of ordinary families and their insulation performance is good, they can effectively ensure the safety of residents' electricity use. At the same time, their small outer diameter and good flexibility enable them to easily pass through pipelines in walls, floors and ceilings without affecting the beauty of the residence.

Commercial places such as offices and shops have high requirements for the stability and safety of cables. These two cables can be used as connecting cables from distribution boxes to various electrical equipment, ensuring the normal operation of computers, printers, air conditioners and other equipment. Commercial places have dense electrical equipment, and the low DC resistance characteristic of the cables can reduce power transmission loss, ensuring the continuous and stable operation of the equipment.

In small industrial workshops, these two cables are suitable for power transmission of small machine tools and auxiliary equipment of assembly lines. There may be certain mechanical vibration and dust in the industrial environment, and the sheath of the cable can resist the impact of these factors and protect the internal structure. Its stable performance can ensure the continuity of the production process and reduce production interruptions caused by power problems.

In the field of municipal facilities, such as street lamp control lines and monitoring equipment power supply, these two cables can also play a reliable role. Street lamps and monitoring equipment need to work outdoors for a long time, facing the test of natural environments such as wind, sun and rain. The weather-resistant PVC Sheath of the cable can resist the erosion of these environmental factors, ensuring its service life and the normal operation of municipal facilities.

In addition, in small entertainment venues such as small Internet cafes and KTVs, these cables can be used for power connection of various electronic equipment, meeting the dense power demand in the venues, and their flame retardant performance can also add a guarantee for the fire safety of the venues.

The conductor is made of high-purity copper with a purity of ≥99.9%. High-purity copper has excellent conductivity because high-purity copper contains very few impurities, reducing the obstruction of impurities to current conduction, resulting in a conductivity of ≥98% IACS, which can efficiently transmit power and reduce energy loss. At the same time, copper has good ductility and mechanical strength. After being processed by the multi-strand precision stranding process, the flexibility of the conductor is further improved, facilitating bending and installation during laying and adapting to different wiring environments. In addition, copper has good oxidation resistance, and is not easy to reduce conductive performance due to oxidation during long-term use, prolonging the service life of the cable.

The insulation layer is made of high-quality polyvinyl chloride (PVC) material. After optimization with a special formula, it has excellent insulation performance and temperature resistance. Its temperature resistance level reaches 70℃, and it can work stably for a long time in the ambient temperature range of -15℃ to 70℃, adapting to different climate conditions. The volume resistivity is ≥10¹³Ω·cm, which can effectively prevent current leakage and ensure the safety of power transmission. PVC material has good chemical stability, can resist the erosion of acids, alkalis, oils and other chemical substances in daily environments, and prolong the service life of the cable. Moreover, the material has undergone flame retardant treatment, has self-extinguishing property, and has low smoke density, meeting fire safety requirements.

The sheath layer is made of weather-resistant PVC material with a thickness of ≥0.8mm. This material has good mechanical properties, with a tensile strength of ≥12MPa and an elongation at break of ≥150%, which can withstand certain mechanical impacts and wear, protecting the internal conductors and insulation layers of the cable from damage. It has strong weather resistance, can resist the impact of outdoor environmental factors such as ultraviolet radiation and wind and rain erosion, and is suitable for use in outdoor or humid, dusty environments. At the same time, PVC material has good processing performance, is easy to extrude and form, and can ensure the uniform thickness and smooth surface of the sheath layer.

These two cables have two models: U1000 R2V and U1000 R02V, both with a 3-core structure, which is round overall and has a compact structure. The two specifications of 3*2.5mm² and 3G2.5mm² have little difference in appearance, and the main difference lies in the stranding method and marking method of the cores.

The sheath color of the cable is usually black or gray. These colors are not only dirt-resistant, but also can absorb heat, reducing the impact of direct sunlight on the cable. On the surface of the cable, there are clear marks, including cable model, specification, rated voltage, manufacturer, production date, certification mark and other information. These marks are printed with wear-resistant ink to ensure that they are clearly distinguishable during long-term use and transportation, facilitating users to identify and trace the product.

When packaged in coils, the coil diameter of the cable varies according to specifications. Generally, each coil has a length of 100 meters, 200 meters or 300 meters, which can be customized according to customer needs. This coil diameter design is convenient for storage and transportation, and also convenient for laying at the construction site.

The production process of U1000 R2V/U1000 R02V 3*2.5 cables and 3G2.5 copper cables is complex and rigorous. Each link from the selection of raw materials to the inspection of finished products is subject to strict quality control to ensure that the performance and quality of the products meet relevant standards and use requirements.

Conductor manufacturing is the first step of production. First, select high-purity copper ingots with a purity of ≥99.9% for smelting. During the smelting process, the temperature and time are accurately controlled to remove impurities and oxygen in the copper, ensuring the purity of the copper liquid. The smelted copper liquid is made into copper rods through a continuous casting and rolling process, and the diameter of the copper rods is determined according to the final conductor specification. Then, the copper rod is drawn into Copper Wires of different diameters through a wire drawing machine. During the wire drawing process, the wire drawing speed, die precision and cooling system are controlled to ensure that the diameter of the copper wire is uniform, the surface is smooth, and there are no scratches, burrs and other defects. Next, multiple copper wires are precision stranded according to a certain stranding pitch and direction to make a single-core conductor. The multi-strand precision stranding process can improve the flexibility and mechanical strength of the conductor, and at the same time reduce the skin effect and improve the conductivity.

Insulation layer extrusion is one of the key processes. The stranded single-core conductor is fed into the extruder, and at the same time, high-quality PVC material is added into the hopper of the extruder. The PVC material is heated, melted and plasticized in the extruder, and then evenly wrapped around the outside of the conductor through an extrusion die to form an insulation layer. During the extrusion process, the extrusion temperature, extrusion speed and die pressure are strictly controlled to ensure that the thickness of the insulation layer is uniform, closely combined with the conductor, and free of bubbles, material shortages, eccentricity and other defects. The extruded Insulated Core is cooled and shaped by a cooling system to ensure the dimensional stability of the insulation layer.

The cabling process is to strand 3 insulated cores according to a certain stranding method and pitch to form a 3-Core Cable. For the 3G2.5mm² cable, special attention should be paid to the arrangement of cores and stranding tension during the stranding process to ensure that the stranding method meets the specification requirements. During the cabling process, in order to ensure the roundness and stability of the cable core, some inert materials, such as polypropylene rope, will be filled in the middle of the cable core. At the same time, it is necessary to ensure that the positions of each core are uniform and the stranding is tight, so as to avoid loosening during subsequent processing and use.

Sheath extrusion is carried out after cabling. The cabled core is fed into the sheath extruder, and weather-resistant PVC material is added into the extruder hopper. The material is heated and melted in the extruder, and then evenly wrapped around the outside of the cable core through an extrusion die to form a sheath layer. During the extrusion process, various parameters should be controlled to ensure that the thickness of the sheath layer is ≥0.8mm, the surface is smooth, closely combined with the cable core, and free of bubbles, cracks and other defects. The extrusion of the sheath layer can not only protect the internal structure, but also enhance the weather resistance and mechanical properties of the cable.

During the production process, multiple quality inspections are required. The diameter, DC resistance, tensile strength of the conductor are tested; the thickness, insulation resistance, voltage resistance performance, temperature resistance performance, flame retardant performance of the insulation layer are tested; the structure and size of the cabled core are checked; the thickness, tensile strength, elongation at break, weather resistance of the sheath layer are tested. The finished cable also needs to undergo overall electrical performance tests, mechanical performance tests and environmental performance tests to ensure that all indicators meet relevant standards and design requirements.

The production environment also has an important impact on product quality. The workshop needs to be kept clean and dry, and the temperature and humidity should be controlled within appropriate ranges to avoid dust, impurities and other factors affecting product performance. Production equipment is regularly maintained and calibrated to ensure its operating accuracy and stability, and improve production efficiency and the consistency of product quality.

The packaging design of U1000 R2V/U1000 R02V 3*2.5 cables and 3G2.5 copper cables fully considers the product protection, transportation and storage needs to ensure that the cable is not damaged during the entire circulation process.

The cable is packaged in coils. The length of each coil is usually 100 meters, 200 meters, 300 meters or customized according to customer needs. Packaging materials mainly include wooden cable reels and plastic films. The wooden cable reel is made of high-quality hardwood, which has been dried and anti-corrosive treated, with high strength and stability, and can bear the weight of the cable and the pressure during transportation and storage. Both sides of the cable reel are provided with metal flanges, and the flanges are evenly distributed with a number of holes, which is convenient for handling and loading/unloading with forklifts, cranes and other equipment.

The cable is neatly wound on the wooden cable reel, and appropriate tension is maintained during winding to avoid loosening of the cable or damage caused by mutual friction. The outer layer of the cable is wrapped with a thick layer of plastic film, which has good moisture-proof, dust-proof and anti-corrosion performance, and can effectively isolate the erosion of the cable by external moisture, dust, oil and chemical substances. The plastic film should be closely attached to the surface of the cable and stretched during winding to ensure that there is no gap between it and the cable, forming a sealed protective barrier.

A clear label is fixed on the side or flange of the cable reel. The label details the cable's model, specification, length, rated voltage, manufacturer, production date, production batch number, certification mark and other information. The label is made of waterproof and wear-resistant materials to ensure that the information is clear and legible during transportation and storage, which is convenient for users to identify, count and trace the product.

For exported products or products transported over long distances, the outer part of the wooden cable reel will be reinforced with iron sheets or wooden boxes to enhance the impact resistance and pressure resistance of the packaging and prevent the cable reel from being damaged due to collision and extrusion during transportation. At the same time, the packaging will be printed with internationally accepted warning signs, such as "Do not invert", "Moisture-proof", "Handle with care", "Stacking limit", etc., to remind transport and handling personnel to pay attention to operating specifications.

The transportation of U1000 R2V/U1000 R02V 3*2.5 cables and 3G2.5 copper cables needs to select appropriate transportation methods according to factors such as transportation distance, quantity, destination and traffic conditions, and take corresponding protective measures to ensure that the cables are delivered to the destination safely and timely.

Road transportation is a commonly used transportation method, suitable for medium and short-distance transportation. The transport vehicles are usually large trucks or semi-trailers, and the compartments of the vehicles should be flat, clean and free of sharp debris. Before loading, check the integrity of the cable reel and the packaging of the cable to ensure no damage. When loading, use a forklift or crane to smoothly lift the cable reel into the carriage. There should be a certain gap between the cable reels to avoid mutual collision. For multiple cable reels, they should be arranged neatly and firmly fixed on the carriage with steel wire ropes, fastening belts, etc., to prevent movement or dumping during transportation due to vehicle bumps, sudden braking, etc. During transportation, drivers must strictly abide by traffic rules, control the speed, avoid sudden acceleration, sudden braking and sharp turns, and reduce the impact force on the cable. At the same time, attention should be paid to avoiding severe weather such as heavy rain, high temperature, severe cold and strong wind to prevent the cable from being affected by extreme environments.

Railway transportation is suitable for long-distance and large-volume cable transportation, with the advantages of large transportation volume, good stability and relatively low cost. For railway transportation, the cable reel is loaded into the designated position of the railway freight car and fixed firmly with special fixing devices to ensure that it will not move during transportation. For valuable or fragile cables, boxcars can be used for transportation to prevent erosion by natural factors such as wind, sun and rain. The railway department will track and monitor the goods throughout the process to ensure transportation safety.

Water transportation is mainly used for exported products or long-distance cross-water transportation. The cable reel is loaded into the cabin or deck of the cargo ship through the hoisting equipment at the wharf. The cable reels loaded in the cabin should be stacked reasonably to avoid stacking too high to prevent the bottom cable reels from being crushed. The cable reels loaded on the deck need to be fixed more firmly and covered with waterproof cloth to prevent seawater erosion and rain immersion. During transportation, attention should be paid to weather changes and ship navigation conditions, and timely measures should be taken to ensure the safety of the cables.