Engineered to meet rigorous NEMA, IEEE, and UL electrical standards across critical North American infrastructure and high-vibration power systems.
Across the United States, modern electrical engineering is undergoing a transformative shift driven by grid modernization, the electrification of transportation, and unprecedented power demands from AI computing infrastructure. In these demanding environments, rigid copper busbars frequently encounter mechanical fatigue due to thermal expansion, intense cyclical vibrations, and seismic requirements. Braided copper straps and flexible laminated shunts have emerged as the paramount solution for reliable, low-resistance electrical connections.
From utility-scale solar generation corridors in the American Southwest to heavy manufacturing centers throughout the Midwest, flexible braided copper solutions mitigate mechanical stresses between transformers, switchgear, generators, and battery arrays. Designed with high-purity Oxygen-Free High Conductivity (OFHC) copper, our braided ground straps ensure minimal insertion loss, exceptional ampacity retention, and superior electromagnetic interference (EMI) attenuation, compliant with American National Standards Institute (ANSI) and UL 467 grounding requirements.
Bridgold utilizes advanced molecular diffusion welding, automated high-precision braiding, and customized surface coatings to exceed US electrical reliability benchmarks.
Engineered using multi-strand copper wire weaving (0.05mm to 0.25mm wire diameters), our straps absorb continuous mechanical shocks, machine oscillations, and thermal dimensional variances without work-hardening or cracking.
Fabricated strictly with 99.95%+ pure electrolytic copper (C11000 ETP/C10200 OFC), delivering exceptional electrical conductivity, minimal contact resistance, and superior current-carrying capacity under continuous operational loads.
Tailored electro-tin, silver, or nickel coatings protect copper surfaces against aggressive oxidation, galvanic corrosion, high-humidity coastal settings, and industrial chemical atmospheres across North American job sites.
Global Leadership in Flexible Conductive Connection Technology
Zhejiang Bridgold Copper Tech Co., Ltd. is a national-level high-tech enterprise specializing in the research, development, design, and production of flexible conductive connection products. The company is located in the Yueqing Economic Development Zone, Wenzhou City, Zhejiang Province, occupying 46,000 m² of land with a total construction area of nearly 100,000 m².
Bridgold is dedicated to the intelligent manufacturing of a comprehensive range of flexible conductive products, including:
Our products are widely used in electric vehicles, energy storage systems, charging infrastructure, wind power, industrial control, rail transit, and medical equipment. With a strong focus on quality and innovation, Bridgold has built a solid reputation both domestically and internationally. Our products are sold throughout China and exported to North America, Europe, Southeast Asia, the Middle East, Africa, and beyond.
As a trusted supplier to many Fortune Global 500 companies and industry leaders, Bridgold has established long-term, stable partnerships with renowned enterprises such as:
In 2010, the company entered the qualified supplier list for Siemens Healthcare and GE Wind Energy, marking a significant milestone in its global expansion.
To date, our copper braided wire series products rank No.1 in global market share, a testament to our manufacturing excellence and customer trust.
In the new energy vehicle sector, our products have been successfully applied in major automotive brands such as Mercedes-Benz, BAIC, SAIC, JAC, NIO, FAW, and Great Wall Motors, ensuring the safety and performance of automotive electrical connection systems.
As of 2025, Bridgold has accumulated 51 national patents, including 16 invention patents. The company participated in the formulation of the national standard GB/T 37133 "High-voltage connection system for electric vehicles". Our core technologies cover cutting-edge fields such as superconducting connection materials, high thermal conductivity composites, and intelligent manufacturing processes.
Bridgold has established a professional copper connection technology R&D center with strong research capabilities, recognized by the Zhejiang Provincial Government as a "Zhejiang Provincial Enterprise Technology R&D Center" and "Zhejiang Provincial Enterprise Technology Center". These certifications ensure comprehensive technical quality control throughout the entire process—from raw material quality analysis and manufacturing process development to product quality inspection.
In response to global industrial upgrading and green transformation, Bridgold continues to advance intelligent manufacturing and digital transformation. We have invested in the development and introduction of high-end manufacturing and testing equipment, building a personalized, digitalized, efficient, and standardized intelligent manufacturing system.
The company actively promotes the standardization of products and technologies by participating in the formulation of industry standards. Through industry-university-research collaboration with universities and research institutions, we jointly tackle common technical challenges in the industry, building distinctive technological advantages for international supply chains.
Reference guide for North American electrical specifiers, switchgear builders, and industrial system integrators.
| Parameter | Standard Specification | Engineering Options / US Code Compliance |
|---|---|---|
| Raw Material | Cu-ETP (C11000) / Cu-OF (C10200) | Purity ≥ 99.95%, ASTM B33 / ASTM B172 compliant |
| Single Wire Diameter | 0.05 mm – 0.25 mm (Ultra-fine to Heavy-gauge) | AWG 30 to AWG 44 strand equivalent |
| Cross-Sectional Area | 1.5 mm² – 2000 mm²+ | Approx. 3,000 kcmil custom multi-stack options |
| Surface Finishing | Bare Copper, Electro-Tin Plated, Silver, Nickel | Tin Plating: ASTM B545; Silver: ASTM B700 |
| Termination Styles | Press-Welded Seamless Ends, Crimp Lugs, Ferrules | UL 486A-486B & UL 467 Certified Terminations |
| Insulation Options | Epoxy Spray, Polyimide Film, PVC / Silicone Sleeving | Halogen-Free, Flame Retardant UL94 V-0 Rated |
| Operating Temperature | -50°C to +150°C (Specialty up to +260°C) | Meets Class H & Class N insulation systems |
Explore our full line of precision copper and aluminum busbars engineered for the United States OEM, utility, and energy sectors.
Technical clarifications regarding standard compliance, custom fabrication, and international logistics.
Bridgold manufactures all flexible copper connectors and braided straps using premium C11000 electrolytic copper with conductivity exceeding 98% IACS. Our bonding and grounding straps are engineered in strict accordance with UL 467 (Grounding and Bonding Equipment) and IEEE 837 requirements, providing reliable performance in switchboards, motor control centers (MCC), and utility installations across the United States.
Yes. Over 70% of our production for the North American market is customized. We offer complete OEM engineering based on your CAD drawings (STEP, DWG, PDF). Options include NEMA 2-hole and 4-hole standard terminal patterns, tin/silver/nickel plating for extreme environments, press-welded solid contact palms, and dielectric epoxy or polyimide insulation.
High-amperage equipment in modern data centers and EV DC fast-charging stations generates continuous thermal expansion and micro-vibrations. Solid copper bars can transmit mechanical stress directly to sensitive electronic terminals, causing joint loosening or micro-arcing. Braided copper straps absorb dimensional shifts and dynamic vibrations, maintaining uninterrupted low-resistance contact.
Bridgold maintains dedicated international export protocols. Fast-turnaround prototypes are typically shipped via express air freight (FedEx/DHL/UPS) within 5–7 business days, while volume sea shipments (DDP/CIF to US West or East Coast ports) are packaged in moisture-proof vacuum-sealed barrier bags within reinforced export pallets to guarantee zero oxidation during transit.