Engineered high-conductivity standard and custom flexible copper systems direct from Zhejiang Xingma Copper Industry.
In electrical engineering, grounding systems require materials capable of carrying high fault currents without significant temperature spikes or structural degradation. A 25 Sq Mm copper grounding braid is specifically engineered to offer the ideal cross-sectional area for medium-to-high power configurations. Utilizing high-conductivity, electrolytic tough pitch (ETP) or oxygen-free copper (OFC) with a minimum copper content of 99.9%, these flexible connectors achieve optimized conductivity paths.
Unlike rigid copper bars, braided profiles are woven from hundreds of individual fine copper wires (typically ranging from 0.12 mm to 0.20 mm in wire diameter). This structural matrix significantly improves the skin effect coefficient under alternating current (AC) high-frequency fault operations. The tinning process, compliant with standards such as ASTM B33, mitigates oxidation risks and galvanic corrosion, which is critical in marine, wastewater treatment, and chemical processing facilities.
| Parameters | Standard Specifications (T2 Bare Copper) | Tinned Copper Variants (ASTM B33) |
|---|---|---|
| Cross-Sectional Area | 25 mm² | 25 mm² |
| Individual Wire Diameter | 0.15 mm – 0.20 mm | 0.12 mm – 0.15 mm |
| DC Resistance (at 20°C) | ≤ 0.727 Ω/km | ≤ 0.754 Ω/km |
| Ampacity Rating (Air, Open) | ~150A to 180A (Depending on ΔT) | ~145A to 175A |
| Operating Temperature | -60°C to +150°C | -65°C to +200°C |
| Standard Approvals | IEC 61439, UL 467, RoHS | IEC 61439, UL 467, RoHS, REACH |
Unlocking superior electrical stability across industrial environments through targeted engineering of 25 Sq Mm copper braided networks.
Wind turbine nacelles and solar photovoltaic tracking structures operate under constant dynamic stress and environmental exposure. The 25 Sq Mm copper braid functions as a flexible ground link that accommodates high vibrational motion, eliminating fatigue fractures common in solid bars.
Modern hyperscale datacenters generate high-frequency electromagnetic interference (EMI). A tinned 25 Sq Mm flat copper braid acts as a low-impedance ground return path, suppressing noise and preventing localized ground-potential differences from disrupting server operations.
In EV designs, the traction inverter, auxiliary system, and battery pack housing need robust electrical grounding to prevent high-voltage hazards. Flexible 25 Sq Mm copper braids with high-temperature insulation layers offer custom, space-saving layouts that match automotive safety protocols.
The progression of modern power grids and high-frequency communication centers demands updates to traditional grounding hardware. At Zhejiang Xingma Copper Industry, our R&D roadmap focuses on three main developments:
How our automated facility in Liushi, China, delivers reliable quality, scalable capacity, and cost-efficiency for industrial copper components.
From initial wire drawing to final braiding, welding, and metal stamping, our 10,000+ sqm manufacturing facility uses advanced equipment, including Dingtian wire drawers and Fuchuan beam machines, to manage production control.
We operate under certified ISO 9001 and ISO 14001 management frameworks. Testing protocols cover hardness metrics, micro-ohm electrical resistance, high-temperature aging, and salt spray resistance testing to verify field performance.
Located in Liushi, Wenzhou—China's electrical component manufacturing cluster—our facility has direct access to raw material sources and transport links through Ningbo and Shanghai ports, helping to minimize export delivery times.
Global procurement teams in electrical manufacturing require component compliance with standard regulatory frameworks. The 25 Sq Mm copper grounding braid from Zhejiang Xingma Copper Industry is manufactured to comply with key standards, including UL 467 (Grounding and Bonding Equipment) and IEC 61439 (Low-voltage switchgear and controlgear assemblies).
For chemical and hazardous substances, all processes, from plating to insulation materials, are verified lead-free and conform to EU RoHS 3 and REACH requirements. When choosing custom configurations, buyers can request testing certifications covering tensile strength, raw material purity (minimum 99.9% T2 copper grade), and micro-ohm resistance profiling. These tests ensure the grounding braids perform reliably in critical installations, such as offshore wind farms or industrial power grids.
Zhejiang Xingma Copper Industry Co., Ltd. was established in 2019 and is located in Liushi, the capital of electrical appliances in China. We are an enterprise mainly engaged in metal products, wire and cable processing and sales, as well as the import and export of goods and technology. The company revolves around the construction of a modern enterprise mechanism and mass production of mechanical automation.
Our leading products include copper wire, copper braided wire, copper stranded wire, soft copper stranded wire, brush wire, carbon brush wire, soft connection series products, and metal stamping parts. These products are sold both domestically and internationally, trusted by our customers worldwide.
Our manufacturing facility spans over 10,000 square meters and is staffed by more than 100 employees. We run more than 300 manufacturing machines, including dingtian wire drawing machines, fuchuan beam machines, pipe twisting machines, braiding machines, annealing furnaces, middle drawing machines, automatic cutting machines, welding machines, air dryers, microscope hardness testers, automatic punching machines, 160-ton punching machines, wire dividing machines, flattening machines, large polishing machines, stamping parts cleaning machines, bench drills, and packing machines, supporting an annual production capacity of more than 2,000 tons.
Our company abides by the Universal Declaration of Human Rights and major United Nations conventions, respects human and labor rights, opposes discrimination and harassment, and supports a culture of mutual respect and personal growth. Relying on our manufacturing foundations and a focus on scientific and technological innovation, we expand into related industries to support our growth. We passed ISO9001 quality system certification and ISO14001 environmental management system certification in 2020. In 2021, the company was recognized as a star enterprise and excellent production enterprise. We are a member unit of the Zhejiang Cable Accessories Industry Association and a member unit of the China Forging Association.
Zhejiang Xingma Copper Co., Ltd. works to support customer requirements with custom options. We integrate manufacturing experience with design concepts to provide reliable, high-quality, and scalable product customization solutions for diverse industries.
Find direct answers to common questions about using 25 Sq Mm copper grounding braids in electrical engineering and power networks.
High-durability tinned copper braids, solder materials, and custom-welded electrical connectors.
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