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High-Quality Hard Drawn Copper Stranded Wires - China Suppliers & Factory for Electrical Applications
Technical Data
Product Display
Model And Meaning
Specifications & Customization
| Part No. | Nominal Cross Section (mm²) | Measured Cross Section (Wires) (mm²) | Wire Structure Strands × Wire Number Per Strand × Layers / Single Wire Diameter (mm) |
Outer Diameter Approx. (mm) | Weight Approx. (kg/km) |
|---|---|---|---|---|---|
| BGJT(X)-16 | 16 | 1.159 | 7/1.70 | 5.10 | 143 |
| BGJT(X)-25 | 25 | 0.735 | 7/2.14 | 6.42 | 226 |
| BGJT(X)-35 | 35 | 0.528 | 7/2.52 | 7.56 | 314 |
| BGJT(X)-50 | 50 | 0.371 | 7/3.00 | 9.00 | 445 |
| BGJT(X)-70 | 70 | 0.263 | 19/2.14 | 10.70 | 618 |
| BGJT(X)-95 | 95 | 0.197 | 19/2.52 | 12.60 | 852 |
| BGJT(X)-120 | 120 | 0.154 | 19/2.80 | 14.00 | 1057 |
| BGJT(X)-150 | 150 | 0.121 | 19/3.15 | 15.75 | 1339 |
| BGJT(X)-185 | 185 | 0.100 | 37/2.52 | 17.64 | 1660 |
| BGJT(X)-240 | 240 | 0.077 | 37/2.85 | 19.95 | 2123 |
| BGJT(X)-300 | 300 | 0.064 | 37/3.15 | 21.70 | 2594 |
| BGJT(X)-400 | 400 | 0.062 | 61/2.85 | 25.65 | 3502 |
Key Advantages
Operating Conditions & Applications
Temperature Range: –40°C to +90°C (tin-plated)
Typical Applications: Electrified railway catenary systems, overhead transmission lines, substation busbars, grounding grids, high-current industrial connections, electric furnace and switchgear leads.
Standard Compliance: Meets all mechanical and electrical requirements of TB/T3111-2005.
Precautions: Avoid direct burial in strong acid/alkali soil or prolonged water immersion for bare copper; tin-plated type withstands mildly corrosive environments.
Maintenance Guidelines
• Regularly inspect for oxidation, broken strands, or mechanical damage, especially at termination points.
• For outdoor or railway use, perform cleaning and tightening checks every 12 months.
• Avoid scratching tin coating; apply anti-oxidation grease on bare copper if needed.
• Store in a dry, ventilated warehouse away from acids, alkalis, salts, and damp floors.
After-Sales & Company Overview
Free technical support, custom orders, 24-hour response. Contact Zhejiang Bridgold Copper Tech Co., Ltd.
Zhejiang Bridgold Copper Tech Co., Ltd. is a professional leader China copper braid flat, copper braid wire, copper braid wire flat, copper braided wire, copper earth braid manufacturers and suppliers with high quality and low price. Welcome to contact us.
Frequently Asked Questions
What is the copper purity and material grade of these stranded wires?
The wires are manufactured using annealed Cu-ETP wires (C11000) with a guaranteed copper content of ≥ 99.95%, delivering high electrical conductivity (≥ 97% IACS) to minimize line losses.
What standard do the hard-drawn copper stranded wires comply with?
Our products fully meet all electrical and mechanical performance requirements of the TB/T3111-2005 standard, making them ideal for electrified railway catenary systems and overhead transmission lines.
What surface finishes and sizes are available for customization?
We provide both bare and tin-plated finishes. Cross-sectional areas range from 16mm² to 400mm² with single wire diameters between 1.70mm and 2.85mm. Wire structure, diameter, plating, and packaging can be customized upon request.
What are the operating temperature limits and environmental precautions?
The tin-plated stranded wire functions reliably in a temperature range from –40°C to +90°C. Bare copper wires should avoid prolonged water immersion or direct burial in strongly acidic or alkaline soils.
What are the primary applications of hard-drawn copper stranded conductors?
They are widely applied in electrified railway catenary messenger wires and droppers, overhead power transmission lines, substation busbars, grounding grids, high-current industrial connections, and switchgear leads.
What packaging options and maintenance routines are recommended?
Products are delivered in rolls, spools, or wooden drums. For railway and outdoor applications, a 12-month routine inspection and cleaning is recommended. Conductors should be stored in dry, ventilated areas away from chemical corrosives.