Products Categories

Flexible Copper Stranded Wires

Insulated Flexible Copper Stranded Wires

Hard Drawn Copper Stranded Wires

Highly Flexible Stranded Copper Wire

BRIDGOLD Hard Drawn Copper Stranded Wires

China Factory Suppliers of Hard Drawn Copper Stranded Wires for Electrified Railway and Electrical Connections

Introducing our BGJT(X) type hard drawn copper stranded wires, expertly manufactured in China by leading suppliers and factories. These premium copper wires, designed for optimal electrical conductivity, feature larger diameters and stronger breaking loads. They adhere to the TB/T3111-2005 standard, ensuring reliability and performance. With a single wire diameter ranging from 1.70 to 2.85mm and nominal cross sections from 16 to 400mm², our wires are available in both bare and tin-plated finishes. Ideal for various applications such as electrified railway catenary systems, overhead transmission lines, grounding, and heavy-duty electrical connections, our wires offer exceptional tensile strength and outstanding conductivity for all your electrical needs.

Product Details

Technical Data

Material

annealed Cu-ETP wires, C11000, copper content ≥ 99.95%

Finish

bare, tin plating

Single Wire Diameter

1.70mm - 2.85mm

Cross Sectional Area

16mm² - 400mm²

Packing Modes

in rolls, on spools or wooden drums

Product Display

Model And Meaning

Customization Upon Request

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

Advantages

✓

High Breaking Load: Manufactured with larger single wire diameters (1.70–2.85mm), providing significantly higher breaking load than fine-strand wires. Fully compliant with TB/T3111-2005, suitable for electrified railway catenary messenger wires, droppers, and long-span overhead lines.

✓

High Tensile Strength: Hard-drawing process ensures mechanical strength meeting strict railway standards.

✓

Excellent Conductivity: Copper content ≥99.95% ensures conductivity ≥97% IACS, reducing line losses.

✓

Corrosion Resistance Option: Tin-plated finish resists sulfurization and humid corrosion, extending service life.

✓

Customizable: Cross section, single wire diameter, plating, and packing can be tailored to customer needs.

Operating Conditions

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.

Precautions: Avoid direct burial in strong acid/alkali soil or prolonged water immersion for bare copper; tin-plated type withstands mildly corrosive environments.

Standard Compliance: Meets all mechanical and electrical requirements of TB/T3111-2005.

Maintenance

• 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 dry, ventilated warehouse away from acids, alkalis, salts, and damp floors.

After-Sales

Free technical support, custom orders, 24-hour response. Contact Zhejiang Bridgold Copper Tech Co., Ltd.

Company Profile & Capability

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 (FAQ)

What is the purity and raw material standard of the copper stranded wires?

The wires are manufactured using high-grade annealed Cu-ETP (C11000) with a copper content ≥ 99.95%, ensuring exceptional electrical conductivity (≥ 97% IACS) and low line losses.

What are the differences between bare copper and tin-plated copper finish?

Bare copper provides maximum natural conductivity for standard indoor/overhead connections, while the tin-plated finish adds anti-oxidation and sulfurization resistance, suitable for humid and mildly corrosive outdoor operating environments.

Which industrial standards do these stranded wires comply with?

Our hard-drawn copper stranded wires strictly meet all mechanical and electrical performance requirements specified in the TB/T3111-2005 standard.

What cross-sectional areas and packaging options are available?

Standard nominal cross sections range from 16 mm² up to 400 mm². Custom packaging options are available, including delivery in rolls, on spools, or heavy-duty wooden drums.

What is the recommended maintenance routine for outdoor railway installations?

For railway catenary and outdoor overhead installations, regular inspections and tightening checks should be conducted every 12 months, checking for strand integrity, surface oxidation, and terminal connections.

Can custom wire diameter configurations and lengths be manufactured?

Yes, Zhejiang Bridgold Copper Tech Co., Ltd. offers full customization services including single wire diameters (1.70mm - 2.85mm), strand counts, plating options, and custom reel lengths.