Detailed Information on H05V-K 2.5mm² Flexible PVC Insulated Stranded Copper Wire (300/500V)
1. Product-Specific Information
1.1 Specification Parameters
The H05V-K 2.5mm² flexible PVC insulated
Stranded Copper Wire is engineered to meet rigorous standards for low-voltage electrical applications, with specifications tailored to balance performance,
Flexibility, and safety. At its core, the conductor features a stranded design composed of 19 individual
Copper Strands, each with a diameter of 0.41mm, twisted together to form a 2.5mm² cross-sectional area. This stranded structure adheres to Class 5 flexibility standards (per IEC 60228), ensuring exceptional bendability and resistance to fatigue from repeated movement.
The conductor’s electrical performance is a key highlight: its DC resistance at 20°C is maximum 8.21Ω/km, ensuring efficient current transmission with minimal energy loss. This low resistance allows the wire to carry a continuous current of up to 24A under normal operating conditions (70°C ambient temperature), making it suitable for medium-load devices such as air conditioners (typically 8-15A) and washing machines (5-10A). For short-duration overloads (up to 1 hour), it can handle currents up to 32A, providing a safety margin for temporary spikes.
The
PVC Insulation layer has a nominal thickness of 0.8mm, with a minimum thickness of 0.6mm to maintain reliable electrical isolation. It is rated for a voltage of 300/500V, where 300V refers to the phase-to-earth voltage and 500V to the phase-to-phase voltage, compliant with IEC 60245-1 standards for low-
Voltage Cables. The insulation’s dielectric strength exceeds 10kV/mm, ensuring it can withstand transient voltage surges without breakdown.
Mechanical specifications further define its usability: the wire has a minimum bending radius of 4 times its outer diameter (OD) for fixed installations and 6 times the OD for dynamic applications (e.g., frequent movement). The overall OD, including insulation, measures approximately 5.2mm, making it easy to route through tight spaces like wall cavities or cable ducts. The insulation’s tensile strength is at least 12MPa, with an elongation at break of 150%, ensuring it resists tearing during installation.
Environmental performance is another critical parameter: the wire operates reliably in temperatures ranging from -20°C to 70°C, with short-term exposure to -30°C (during storage or installation) causing no permanent damage. It is also resistant to water immersion (up to 1m for 24 hours) and UV radiation (when shielded from direct sunlight), making it suitable for both indoor and protected outdoor use.
1.2 Material Composition and Structural Design
The materials used in the H05V-K wire are selected to optimize conductivity, flexibility, and durability. The conductor strands are made from high-purity electrolytic copper (99.95% purity), chosen for its exceptional electrical conductivity (58 MS/m at 20°C) and ductility. This purity level minimizes impurities that could create resistance hotspots, while the copper’s malleability allows the strands to be drawn to fine diameters (0.41mm) without fracturing.
The PVC insulation compound is a specialized formulation designed for electrical applications, consisting of polyvinyl chloride resin blended with plasticizers, heat stabilizers, flame retardants, and antioxidants. Phthalate-based plasticizers (e.g., diisononyl phthalate) are added to enhance flexibility, ensuring the insulation remains pliable even at -20°C. Calcium-zinc heat stabilizers replace traditional lead-based additives to meet RoHS compliance, preventing degradation caused by heat and oxidation.
Flame retardants, such as antimony trioxide (5-10% by weight) and aluminum hydroxide (15-20%), are incorporated to achieve a V0 flammability rating per UL 94, meaning the insulation self-extinguishes within 10 seconds after removing the ignition source. This reduces fire propagation risk in case of a short circuit. Antioxidants (e.g., hindered phenols) are included to slow oxidative aging, extending the insulation’s service life to 20+ years under normal conditions.
Structurally, the wire features a tight bond between the copper strands and PVC insulation, achieved through controlled extrusion. During manufacturing, the molten PVC is applied directly to the
Stranded Conductor, ensuring intimate contact that prevents moisture ingress between the conductor and insulation—this is critical for preventing corrosion and maintaining electrical integrity. The stranded design also creates small air gaps between strands, improving heat dissipation during high-current operation and reducing thermal stress on the insulation.
1.3 Unique Features and Target Applications
One of the most distinctive features of the H05V-K 2.5mm² wire is its Class 5 flexibility, which sets it apart from stiffer Class 1-
4 Conductors. This flexibility is enabled by the 19-strand design, allowing the wire to bend repeatedly (up to 10,000 cycles at a 90° angle) without conductor fatigue or insulation cracking. This makes it ideal for applications requiring movement, such as:
The 2.5mm² conductor size strikes a balance between current-carrying capacity and flexibility, making it a “workhorse” for medium-load devices. Unlike smaller 1.5mm² wires (limited to 16A), it can handle higher-power appliances like 2.5kW air conditioners, while remaining more flexible than 4mm² wires (which are overkill for most household uses).
The PVC insulation’s
Chemical Resistance is another key advantage. It withstands exposure to common household substances such as detergents, cooking oils, and mild cleaning agents, making it suitable for kitchen and laundry room installations. It is also resistant to abrasion, withstanding 5,000+ cycles of rubbing against concrete or metal without insulation damage—critical for cables routed through unprotected areas like basements or attics.
Target applications span residential, commercial, and light industrial settings:
Residential: Wiring for kitchen appliances (dishwashers, ovens), home theater systems, and portable heaters. It is also used for extending power cords for outdoor tools like lawnmowers (when protected from direct rain).
Commercial: Office equipment (printers, copiers), retail display lighting, and point-of-sale systems. Its flexibility simplifies routing under desks or through ceiling grids.
Light Industrial: Powering small machinery in workshops (e.g., drills, sanders), assembly line auxiliary equipment, and temporary lighting for construction sites (under cover).
1.4 Manufacturing Process
The production of H05V-K 2.5mm² wire involves precision manufacturing steps to ensure consistency and compliance with standards.
Conductor Preparation: High-purity copper rods (99.95% purity) are first drawn through a series of diamond dies to reduce their diameter from 8mm to 0.41mm. This cold-drawing process work-hardens the copper, increasing its tensile strength while maintaining conductivity. The 0.41mm strands are then annealed in a controlled atmosphere furnace (nitrogen-protected) at 400-500°C to restore ductility, ensuring they can be twisted without breaking.
Stranding: Nineteen annealed strands are twisted together using a planetary stranding machine, which rotates the strands around a central axis in a helical pattern. The stranding pitch (distance between consecutive twists) is set to 16-20 times the strand diameter (6.5-8mm), balancing flexibility and structural stability. This tight twisting ensures the strands remain cohesive during handling and prevents “birdcaging” (strand separation) when bent.
Insulation Extrusion: The stranded conductor is fed into an extrusion line where molten PVC compound (heated to 160-190°C) is applied through a crosshead die. The die is precision-engineered to maintain a uniform 0.8mm insulation thickness around the irregular stranded surface. A vacuum sizing sleeve cools the insulation immediately after extrusion, ensuring dimensional stability. The extrusion speed is synchronized with the stranding machine (typically 100-150 meters per minute) to avoid stretching or compressing the conductor.
Quality Testing: Each batch undergoes rigorous testing:
Spooling: Passed wires are spooled onto plastic or cardboard reels of 50m, 100m, or 500m lengths, with each reel labeled with product details (type, size, voltage, batch number) and compliance marks (CE, UL).
2. General Product Information
2.1 Packaging
H05V-K 2.5mm² wire is packaged to ensure protection during storage, transportation, and handling. For retail and small-quantity orders, 50m and 100m lengths are spooled onto lightweight cardboard reels with a 75mm core diameter. These reels feature a built-in handle for easy unwinding and are shrink-wrapped in clear plastic to protect against dust and moisture. The plastic wrap is printed with product specifications and safety warnings (e.g., “Do not exceed 24A current”).
Bulk orders (500m+) use heavy-duty plastic reels with a 150mm core, designed to withstand mechanical handling. These reels are stacked on wooden pallets (40×48 inches) with up to 20 reels per pallet, secured with steel strapping. Pallets are wrapped in black stretch film to prevent shifting during transit and labeled with:
For international shipping, reels are placed in seaworthy containers with moisture-absorbing desiccants to prevent condensation. Each container holds 20-25 pallets (200,000-250,000m total length), depending on container size (20ft or 40ft).
2.2 Transportation and Handling
Transporting H05V-K wire requires adherence to best practices to avoid damage. The wire is classified as non-hazardous (UN 3082 exempt for limited quantities), but improper handling can damage the insulation or conductor.
Loading/Unloading: Reels must be lifted using forklifts with padded tines or cranes with slings around the reel core—never by the flanges, which can crack. For small reels, manual handling is permissible if using two people (to avoid bending or dropping).
Transport: During road transport, reels are secured to the truck bed with ratchet straps (minimum 2500kg breaking strength) to prevent rolling. For long distances, covered trucks are recommended to shield from UV radiation and rain. Sea transport requires containers to be ventilated (relative humidity <60%) to prevent mold growth on cardboard reels.
Storage: Wire should be stored in a dry, well-ventilated warehouse with temperatures between 5°C and 30°C. Reels are stored horizontally on racks (not stacked) to prevent warping, and away from heat sources (e.g., radiators) or chemicals (e.g., solvents) that could degrade PVC. Expired stock (older than 5 years) is re-tested for insulation integrity before sale.
On-Site Handling: During installation, the wire should be unwound from the reel using a spindle to avoid twisting. Pulling the wire directly from the reel can cause kinks, which weaken the insulation. Sharp tools (e.g., knives) used to cut the wire must be insulated to prevent accidental conductor damage, and cuts should be clean (not jagged) to ensure proper termination.
2.3 Ordering, Delivery, and Sample Policy
Customers can order H05V-K 2.5mm² wire through distributors, online platforms, or direct from manufacturers. Minimum order quantities (MOQ) are 50m for retail, 500m for bulk, and 10,000m for custom lengths (e.g., 300m reels).
Order Customization: Options include:
Color-coded insulation (standard is black, but red, blue, or white are available for phase identification)
Lead Times: In-stock orders ship within 24-48 hours. Custom orders require 3-5 business days for production. International delivery takes 7-14 days (air freight) or 30-40 days (sea freight), depending on destination.
Sample Requests: Free 1m samples are available upon request, with customers covering shipping costs. Samples include a certificate of compliance with test results (conductor resistance, insulation thickness, flame rating). Requests are processed within 24 hours via courier (DHL, FedEx).
2.4 After-Sales Service and Warranty
The H05V-K wire is backed by a 10-year warranty against defects in materials and workmanship. The warranty covers:
It excludes damage from:
To file a claim, customers provide:
Claims are processed within 5 business days, with resolutions including replacement, refund, or partial credit.
Technical support is available via phone, email, or online chat. Engineers provide guidance on:
2.5 Compliance and Certifications
The H05V-K 2.5mm² wire meets global standards, ensuring market access and safety:
Certificates are available on request, including test reports from accredited labs (e.g., SGS, Intertek) verifying compliance with each standard.
3. Environmental and Sustainability Considerations
Manufacturers of H05V-K wire are increasingly focusing on sustainability:
PVC Management: Post-Industrial PVC scrap (from extrusion) is recycled into new insulation compounds, reducing waste. Some manufacturers offer “green PVC” options using bio-based plasticizers (e.g., from vegetable oils).
4. Comparison with Alternatives
The H05V-K 2.5mm² wire competes with several alternatives, each with trade-offs:
The H05V-K strikes the best balance for most medium-load, flexible applications, offering a cost-effective solution with broad compatibility.
Conclusion
The H05V-K 2.5mm² flexible PVC insulated stranded copper wire is a versatile, reliable solution for low-voltage power transmission. Its combination of Class 5 flexibility, 24A current capacity, and durable PVC insulation makes it indispensable in residential, commercial, and light industrial settings. Backed by global certifications, robust packaging, and comprehensive after-sales support, it stands as a benchmark for performance and value in its category.
As electrical systems evolve to meet growing demands for efficiency and safety, the H05V-K wire continues to adapt. Manufacturers are exploring enhancements such as improved flame-retardant PVC formulations to reduce smoke emission during combustion, making it suitable for more stringent fire safety zones like hospitals and schools. Additionally, research into thinner yet stronger
Insulation Materials aims to further increase flexibility without compromising voltage withstand capabilities, opening doors to applications in miniaturized electronics and compact machinery.
For end-users, the wire’s reliability translates to reduced maintenance costs and fewer downtime incidents. Its compatibility with standard connectors and termination tools simplifies installation, minimizing labor expenses and ensuring consistent performance across diverse projects. Whether used in a home renovation, office expansion, or industrial upgrade, the H05V-K 2.5mm² wire delivers a level of dependability that has earned it trust among electricians, engineers, and DIY enthusiasts alike.
In summary, the H05V-K 2.5mm² flexible PVC insulated stranded copper wire is more than just a cable—it is a critical component that ensures the safe and efficient flow of electricity in countless daily applications. Its blend of technical excellence, practical design, and commitment to sustainability makes it a top choice for anyone seeking a
Low-voltage wiring solution that balances performance, affordability, and peace of mind.
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