Th Electrical Cable H07vu H07vr 1.5 2.5 4 6 mm² Rigide & Flexible Copper Wire 450/750V for France

The specification parameters of the H07vu and H07vr series Electrical Cables are carefully designed to fully meet the diverse needs of the French market in power transmission and distribution, providing stable and reliable power support for different scenarios.

There is a rich range of wire diameter specifications, covering 1.5mm², 2.5mm², 4mm², and 6mm². The conductor cross-sectional areas corresponding to different wire diameters are precisely controlled to ensure that the current-carrying capacity meets the design standards. The conductor cross-sectional area error of the 1.5mm² cable is controlled within ±0.08mm², 2.5mm² is ±0.13mm², 4mm² is ±0.2mm², and 6mm² is ±0.3mm². Strict size control provides a basis for the stability of the current-carrying capacity.

The rated voltage is 450/750V, which enables it to adapt to the voltage level of the French low-voltage electrical system. Whether it is daily electricity use in residential buildings, or power distribution in commercial buildings and industrial facilities, it can operate safely and stably.

Current-carrying capacity is a key indicator reflecting the transmission capacity of the cable, and there are obvious differences in the current-carrying capacity of cables with different wire diameters. At an ambient temperature of 30°C, the 1.5mm² cable has a current-carrying capacity of about 16A, which can meet the low-power electricity demand of lighting circuits, small household appliance sockets, etc.; the 2.5mm² has a current-carrying capacity of about 25A, suitable for power supply of ordinary sockets, small motors and other equipment; the 4mm² has a current-carrying capacity of about 32A, which can provide stable power for high-power appliances such as air conditioners and electric water heaters; the 6mm² has a current-carrying capacity of about 40A, often used for dedicated power supply of industrial equipment and large appliances. When the ambient temperature rises, the current-carrying capacity will decrease accordingly. For example, at 40°C, the current-carrying capacity of 1.5mm² drops to about 14A, 2.5mm² is about 22A, 4mm² is about 28A, and 6mm² is about 35A. This requires that in actual installation, the Cable Wire diameter should be reasonably selected according to the ambient temperature.

Rigid Cables use single-strand hard Copper Conductors, and the conductor diameter varies according to the wire diameter. The conductor diameter of 1.5mm² is about 1.38mm, 2.5mm² is about 1.78mm, 4mm² is about 2.25mm, and 6mm² is about 2.76mm. The single-strand structure gives it high structural strength, suitable for fixed laying, with a minimum bending radius of 10 times the outer diameter. The minimum bending radius of 1.5mm² cable is about 12mm, 2.5mm² is about 15mm, 4mm² is about 18mm, and 6mm² is about 22mm.

Flexible Cables are multi-strand soft Copper Conductors. 1.5mm² is stranded with 19 strands of copper wire with a diameter of 0.31mm, 2.5mm² is stranded with 19 strands of copper wire with a diameter of 0.41mm, 4mm² is stranded with 19 strands of copper wire with a diameter of 0.52mm, and 6mm² is stranded with 37 strands of copper wire with a diameter of 0.45mm. The multi-strand structure endows it with excellent Flexibility, with a minimum bending radius of 4 times the outer diameter. 1.5mm² is about 4.8mm, 2.5mm² is about 6mm, 4mm² is about 7.2mm, and 6mm² is about 8.8mm, which is convenient for installation in narrow spaces or scenarios that require frequent bending.

In addition, the insulation thickness of the cable is also designed according to the wire diameter. The insulation thickness of 1.5mm² and 2.5mm² is 0.7mm, and that of 4mm² and 6mm² is 0.8mm, ensuring good insulation performance. In terms of sheath thickness, 1.5mm² and 2.5mm² are 0.6mm, and 4mm² and 6mm² are 0.7mm, providing reliable protection for the cable.

This series of cables has passed the NF C 32-070 French standard certification, and meets the standard requirements in terms of conductor resistance, insulation resistance, voltage withstand, etc. Among them, the DC resistance of the conductor at 20°C is 1.5mm² ≤ 12.1Ω/km, 2.5mm² ≤ 7.41Ω/km, 4mm² ≤ 4.61Ω/km, and 6mm² ≤ 3.08Ω/km, ensuring good conductivity. The insulation resistance at 70°C is ≥ 100MΩ·km, ensuring effective isolation of current and preventing electric leakage accidents.

With their various specifications and unique properties, the H07vu and H07vr series electrical cables have a wide range of distinctive applications in residential buildings, commercial buildings, industrial facilities and other fields in France, meeting the power needs of different scenarios.

In the residential field, 1.5mm² and 2.5mm² flexible cables are widely used. The 1.5mm² flexible cable has a current-carrying capacity of about 16A, suitable for lighting circuits, such as chandeliers in the living room, ceiling lamps in the bedroom, wall lamps in the corridor, etc. Its flexibility can adapt to complex wiring paths in ceilings and walls. At the same time, it can also be used for small household appliance sockets, such as power supply for low-power devices such as mobile phone chargers and small desk lamps. The 2.5mm² flexible cable has a current-carrying capacity of about 25A, which can be connected to ordinary sockets to provide power for common household appliances such as TVs, refrigerators, and washing machines. Its good flexibility is convenient for laying in narrow spaces such as under the floor and inside the wall.

Rigid cables in residences are suitable for fixed laying lines, such as main lines inside walls and pre-embedded lines under the ground. The 1.5mm² rigid cable can be used for the main lighting line, and the 2.5mm² rigid cable can be used as the main socket line. Their single-strand hard copper conductor structure is stable, not easy to deform during long-term fixed laying, and can ensure the stability of power transmission.

In commercial buildings, 4mm² and 6mm² cables play an important role. The 4mm² cable has a current-carrying capacity of about 32A, which can be used for power supply of central air conditioning indoor units, commercial water dispensers and other equipment, ensuring the stable operation of these equipment during commercial operations. The 6mm² cable has a current-carrying capacity of about 40A, suitable for power supply of high-power equipment such as large commercial refrigerators and escalators, meeting the high power demand of commercial places. In the distribution trunk lines of commercial buildings, rigid 4mm² and 6mm² cables are often used for fixed laying due to their stable structure, while in areas that need to connect mobile equipment, such as temporary sockets in conference rooms and promotional stalls in shopping malls, flexible 4mm² and 6mm² cables can be selected.

In industrial facilities, the application of H07vu and H07vr series cables is indispensable. Flexible cables can connect mobile equipment, such as charging sockets for electric forklifts in the workshop and movable production tools. Their excellent flexibility can adapt to the movement and frequent bending of the equipment. Flexible cables are also commonly used for connecting production line motors. 1.5mm² can connect small conveyor motors, 2.5mm² is suitable for medium-sized mixing motors, and 4mm² and 6mm² can be used for large compressor motors, etc. Rigid cables are used for fixed distribution trunk lines to distribute power from the distribution room to various production areas. The 4mm² and 6mm² rigid cables can meet the power transmission needs of industrial equipment concentration areas.

In addition, H07vu and H07vr series cables are also widely used in some special places in France, such as hospitals and schools. In hospitals, flexible cables can be used for mobile power supply lines of medical equipment, and rigid cables are used for fixed power trunk lines to ensure the stable operation of medical equipment. In schools, 1.5mm² and 2.5mm² cables can be used for classroom lighting and sockets, and 4mm² cables can meet the power demand of laboratory equipment.

In terms of material selection and style design, the H07vu and H07vr series electrical cables are fully combined with the climate characteristics and electrical usage needs of France, taking into account performance, safety and practicality.

In terms of Conductor Materials, both the single-strand hard copper conductors of rigid cables and the multi-strand soft copper conductors of flexible cables are made of high-purity electrolytic copper with a purity of more than 99.9%. High-purity copper has excellent conductivity, which can reduce energy loss during current transmission and improve power transmission efficiency. At the same time, copper has good oxidation resistance and corrosion resistance, which can adapt to the humid and foggy climate in France and extend the service life of the cable.

Both the insulation layer and the sheath are made of high-quality PVC (polyvinyl chloride) materials. PVC material has good insulation performance with an insulation resistance of ≥ 100MΩ, which can effectively isolate the current and prevent electric leakage accidents. It has a wide temperature resistance range and can work normally in an environment of -25°C to 70°C, which can resist the severe cold in winter and high temperature in summer in France, as well as temperature changes indoors and outdoors. In addition, PVC material also has certain chemical corrosion resistance, which can resist the erosion of acids, alkalis and other chemical substances that may exist in industrial environments, and protect the internal conductors from damage.

The sheath has excellent mechanical properties, with good tensile strength and elongation at break. The tensile strength of the sheath of 1.5mm² and 2.5mm² cables is ≥ 12MPa, and the elongation at break is ≥ 150%; the tensile strength of the sheath of 4mm² and 6mm² cables is ≥ 10MPa, and the elongation at break is ≥ 125%, which can withstand tensile, extrusion and other external forces during laying and use, and is not easy to be damaged.

In terms of style design, the color identification of the cable is clear and standardized, in line with French electrical standards. Colors such as brown and black represent phase lines, blue is the neutral line, and yellow-green 双色 is the ground line. This clear color distinction can help electricians quickly identify the function of each line during installation and wiring, reduce the probability of wiring errors, and improve construction efficiency and safety.

Rigid cables have a round appearance and a smooth surface. The single-strand hard copper conductor gives them a certain hardness, which is convenient for maintaining shape during fixed laying, and is suitable for installation methods such as pipe threading and wall embedding. Flexible cables also have a round appearance. The multi-strand soft copper conductor makes them soft in texture, and the surface is also smooth, which is convenient for bending and winding in narrow spaces, suitable for mobile equipment connection, complex path laying and other scenarios.

The outer diameter of the cable is reasonably designed. The outer diameter of 1.5mm² flexible cable is about 4mm, and that of rigid cable is about 4.5mm; the outer diameter of 2.5mm² flexible cable is about 5mm, and that of rigid cable is about 5.5mm; the outer diameter of 4mm² flexible cable is about 6mm, and that of rigid cable is about 6.5mm; the outer diameter of 6mm² flexible cable is about 7mm, and that of rigid cable is about 7.5mm. Such outer diameter dimensions can adapt to common cable pipes and trunking in the French market, facilitating installation and construction.

The production process of H07vu and H07vr series electrical cables is complex and rigorous. Every link from raw material processing to finished product inspection is strictly controlled to ensure that the product quality meets the NF C 32-070 French standard and market demand.

Conductor manufacturing is the first step in production. For the single-strand hard copper conductor of rigid cables, high-purity electrolytic copper ingots are selected, smelted at high temperature, and then made into copper rods through continuous casting process. The diameter of the copper rods is precisely controlled according to the requirements of different wire diameters. Then, the copper rod enters a wire drawing machine for a single wire drawing to be drawn into a single-strand hard copper wire of the required diameter. During the wire drawing process, the drawing speed and die precision are strictly controlled to ensure that the copper wire has a uniform diameter, a smooth surface, and no burrs, cracks and other defects.

The manufacture of multi-strand soft copper conductors for flexible cables requires multiple processes. First, the copper ingot is smelted into a copper rod, and then the copper rod is drawn into fine copper wires through multiple drawing processes. The required copper wire diameters for flexible cables of different wire diameters are different: 1.5mm² is 0.31mm, 2.5mm² is 0.41mm, 4mm² is 0.52mm, and 6mm² is 0.45mm. The drawn fine copper wires need to be annealed. The copper wires are heated to 300-400°C and then slowly cooled to eliminate internal stress and improve the flexibility of the copper wires. The annealed copper wires are stranded according to the specified number of strands: 19 strands for 1.5mm² and 2.5mm², and 37 strands for 6mm². During the stranding process, it is ensured that each strand of copper wire is evenly stressed and tightly stranded to form a multi-strand soft copper conductor.

Insulation layer extrusion is a key step to endow the cable with insulation performance. The manufactured conductor is sent to an extruder, and a layer of PVC Insulation is extruded outside the conductor. Before extrusion, PVC raw materials need to undergo strict screening and drying treatment to remove impurities and moisture to ensure the quality of the insulation layer. The temperature control of the extruder is crucial. The barrel temperature is set at 160-180°C to fully melt and plasticize the PVC material. The molten PVC material is evenly coated on the surface of the conductor through a die to form an insulation layer with uniform thickness. The insulation thickness of 1.5mm² and 2.5mm² is 0.7mm, and that of 4mm² and 6mm² is 0.8mm. The extruded Insulated Wire core is quickly cooled through a cooling water tank to shape the PVC insulation layer.

The sheath extrusion process follows closely. The wire core with the insulation layer is sent to the sheath extruder, and a layer of PVC Sheath is extruded outside the insulation layer. The process of sheath extrusion is similar to that of insulation layer extrusion. PVC raw materials also need to be processed, and the extrusion temperature is controlled at 170-190°C. The molten PVC material is evenly coated on the surface of the insulation layer through a die to form a sheath with uniform thickness. The sheath thickness of 1.5mm² and 2.5mm² is 0.6mm, and that of 4mm² and 6mm² is 0.7mm. The extruded cable is cooled through a cooling water tank to shape the sheath.

During the sheath extrusion process, color identification printing is carried out at the same time. Corresponding colors are extruded on the surface of the sheath through special color masterbatches, such as brown and black for phase lines, blue for neutral lines, and yellow-green 双色 for ground lines. The colors should be uniform, clear and not easy to fall off, which is convenient for identification.

After the cable is formed, printing is required. The product specifications, model, rated voltage, implementation standard, production batch number, manufacturer name and other information are printed on the surface of the sheath by a printing machine. The printing should be clear and firm, which is convenient for product identification and traceability.

Finally, the cable undergoes a series of strict quality inspections, including DC resistance test of the conductor to ensure its conductivity meets the standard; insulation resistance test and voltage withstand test to verify the insulation performance of the insulation layer and sheath, which can withstand 1500V voltage for 1 minute without breakdown; mechanical performance test to check the tensile strength and elongation at break of the sheath; and appearance inspection to ensure the cable surface is smooth, free of bubbles, cracks and other defects. Qualified cables are cut and wound according to the specified length (usually 100 meters, 200 meters, 500 meters), and then packaged.

The packaging design of H07vu and H07vr series electrical cables fully considers product protection, transportation, storage and customer convenience, ensuring that the products are not damaged during circulation and remain in good condition during circulation.