Direct supply from our automated China factory featuring advanced metallurgical characteristics, structural precision, and compliant certifications.
Precise stranding of multiple high-purity micro-conductors delivering outstanding flexibility for electrical connections.
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Soft connection conductive copper flat tape designed for reliable, high-current electrical connections in distribution boards.
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Premium alloy engineering offering optimized contact resistance and lifespan under harsh switching cycles.
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Highly refined powder for PM applications, powder metallurgy, chemical applications, and friction materials manufacturing.
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Durable relays contact elements formulated to handle critical electrical currents with minimum power loss.
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Precision stamping services utilizing highly robust molds for structural, electrical assembly, and connector housings.
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Ultra-pure metal formulation ideal for electronics manufacturing, thermal control components, and sintered parts.
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High-purity stranded copper core protected by a uniform, bend-resistant insulating plastic jacket.
Learn MoreIn modern industrial electrification and power distribution, the choice of grounding and conductive media determines system safety, electrical performance, and overall system longevity. The 25mm² nominal cross-section bare copper stranded wire acts as a critical standard for low-voltage power networks, electrical ground bonding systems, and machinery links requiring high flexibility and robust ampacity.
Engineered using Grade T1/T2 red copper with an absolute purity rating of ≥99.90%, our 25mm² conductors exhibit outstanding electrical conductivity matching 100% of the International Annealed Copper Standard (IACS). Stranding geometry is scientifically designed—utilizing concentric lay patterns or highly flexible multi-bundle rope designs—to balance physical flexibility and mechanical tensile strength. By utilizing precise wire drawing and oxygen-free annealing systems, we ensure minimal internal mechanical stress, allowing the wire to withstand severe cyclic bending, heavy thermal expansions, and intense structural vibrations.
| Parameters | Value / Standards |
|---|---|
| Nominal Cross-Sectional Area | 25 mm² |
| Raw Material Grade | T1, T2 Red Copper (≥99.90% purity) |
| DC Electrical Resistance (20°C) | ≤ 0.727 Ω/km (for bare annealed copper) |
| Stranding Configurations | Concentric class 2 / Highly flexible Class 5 / Class 6 |
| Tensile Strength | ≥ 200 MPa |
| Standards Compliance | IEC 60228, GB/T 3956, ASTM B8 |
| Ideal Operating Temperature | -50°C to +155°C (continuous configuration dependent) |
Analyzing key market dynamics, shifting materials requirements, and the rising demand for high-grade copper conductors.
The global transition to electrification, smart grids, renewable energy microgrids, and electric vehicle (EV) ecosystems has accelerated the demand for high-purity electrical conductors. In heavy industrial regions such as North America, Europe, and Asia-Pacific, 25mm² bare copper stranded wire is widely utilized as the primary specification for structural grounding. Because bare copper provides direct electrical contact without insulation removal, it significantly reduces assembly times in utility-scale grounding installations.
Geopolitical supply chain disruptions have prompted global procurement divisions to establish direct relationships with large-scale factories capable of consistent output. The high cost of copper commodities requires partners that can manage materials volatility through advanced inventory hedging and efficient production technology. Zhejiang Xingma Copper Industry addresses this by maintaining direct relationships with premium copper smelting centers and optimizing our manufacturing processes to limit material scrap to under 1.5%.
Understanding where and why our 25mm² bare copper wire delivers exceptional service across industrial settings.
Industrial Earthing Systems: In telecom base stations and high-voltage transmission towers, 25mm² bare copper wire is direct-buried to establish low-resistance links to ground rods. Its resistance to physical stress and high soil moisture makes it the preferred material for ensuring safety during lighting strikes and high-fault current events.
Power Electronics & Switchgear: Inside heavy industrial control panels, grounding busbars require flexible, highly reliable links to the main distribution frame. Our stranded wire, optimized with custom flexible configurations (Class 5/Class 6), absorbs mechanical vibrations from cooling fans and heavy magnetic switches, preventing joint fatigue.
Electric Vehicle & Battery Interconnects: Modern EV battery packs rely on heavy flexible connectors to bridge individual cell blocks to inverter circuits. With customized welding terminations and plastic-sleeved jackets, our 25mm² copper line delivers optimal ampacity while fitting within restricted chassis configurations.
Renewable Energy Systems: Solar arrays and wind nacelles are exposed to extreme wind loads and temperature fluctuations. The flexibility and corrosion resistance of our stranded wire ensure continuous, low-resistance connections for grounding metal tracking structures and generator housings.
To support next-generation power distribution, Zhejiang Xingma Copper Industry continually updates its manufacturing technology. Our development roadmap centers on three core pillars:
1. Ultra-Low Oxygen and Oxygen-Free Copper (OFC) Transitions: For applications demanding maximum fatigue resistance and electrical purity, we are expanding our continuous-cast capacity for oxygen-free copper. With oxygen content below 10ppm, our OFC wires eliminate the risk of hydrogen embrittlement during high-temperature welding or brazing operations.
2. Composite Nano-Coatings: We are researching chemical vapor deposition and continuous electrodeposition techniques to apply nano-thin protective layers over individual copper strands. This layer improves oxidation resistance at high temperatures (up to 250°C) without affecting the electrical contact performance of the wire.
3. Advanced Automation & Digital Twining: By deploying IoT sensors on our drawing, annealing, and stranding machines, we monitor process parameters in real time. Tension levels, temperature curves, and structural diameter variations are collected to guarantee uniform physical properties across every batch of wire.
Strategic geographic location, vertically integrated production lines, and rapid delivery networks.
Operating in Liushi, Wenzhou—internationally recognized as the "Capital of Electrical Appliances in China"—positions Zhejiang Xingma Copper Industry at the center of an efficient industrial cluster. The concentration of component suppliers, testing laboratories, and logistics providers in this region enables us to source raw materials, design custom tooling, and complete orders faster than isolated competitors.
Our vertical integration extends from raw wire drawing and annealing to custom cutting, high-frequency induction welding, stamping, and automated packaging. This control over the production process ensures quality, shortens manufacturing lead times, and reduces unnecessary transport costs. Our location provides easy access to the deepwater container terminals of Ningbo and Shanghai, facilitating fast and secure export logistics to global markets.
Established in 2019 and headquartered in Liushi, the capital of electrical appliances in China, Zhejiang Xingma Copper Industry Co., Ltd. is a modern manufacturer specializing in metal products, wire processing, and custom electrical connectors. Our core catalog includes premium bare copper wire, braided copper straps, highly flexible copper stranded wire, carbon brush wires, flexible switchgear links, and precision metal stampings.
Our production campus features a modern workshop area of over 10,000 square meters. Operating under ISO9001 and ISO14001 management certifications, we are committed to sustainable processing, human rights, and rigorous quality control. Our products are exported to major markets in Europe, the Americas, and the Middle East, serving energy companies, switchgear factories, and automotive manufacturers.
State-of-the-art machinery and geological advantages designed to support industrial volume requirements.
Based in Liushi, Wenzhou. Connected to global shipping lanes through Shanghai and Ningbo ports, backed by local logistics networks.
Direct supply agreements with nearby raw metal markets ensure consistent copper availability and cost control.
Equipped with Fuchuan bunching machines, Dingtian wire drawing lines, intermediate drawing units, tube twisting machinery, stamping presses up to 160 tons, and bright annealing furnaces.
Zhejiang Xingma Copper Co., Ltd. operates in compliance with international engineering and environmental standards. Our facility is certified under ISO9001:2015 for quality management systems and ISO14001:2015 for environmental management systems.
Every shipment of 25mm² copper stranded wire is supplied with a comprehensive material test report (MTR). This document certifies metallurgical purity, electrical resistivity at 20°C, tensile strength, and exact dimensional parameters. We also conduct internal testing—including microscopic hardness analysis, elongation verification, and load tests—to guarantee long-term performance under demanding operating conditions.
Providing direct, engineering-focused answers to support your technical evaluation and purchasing decisions.
Looking for a reliable manufacturing partner to supply 25mm² bare copper stranded wire, braided grounding connectors, or custom copper terminals? Contact our engineering team in Liushi to request technical sheets, samples, and factory pricing.
Send Technical InquiryComplete custom capabilities, ranging from welding solutions to high-conductivity braided flat wire variants.
Highly flexible connection configurations built to withstand physical stress and heat inside robotic welding terminals.
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Premium braided connectors designed to absorb structural vibrations and thermal movements in distribution lines.
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Custom braided jumpers built for precision electronics, power supplies, switchboards, and heavy laboratory equipment.
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Solderable flat ribbon woven with tinned copper wire, providing excellent corrosion protection and flexible connectivity.
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Tailored cut and weld grounding solutions with solid end terminals for direct installation onto system ground points.
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High-flexibility tinned braided ribbon shielding solutions for dynamic busbars and ground links.
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Consistently graded, pure copper powder formulated for high-conductivity components and sintered tooling.
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8 to 12 spindle braided wires designed for custom electromagnetic shielding and flexible grounding strips.
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