Bare Copper Wire
Solid round copper conductor drawn from Jingda’s own oxygen-free rod, in diameters from 0.25 to 3.00 mm. Produced to GB, IEC, DIN, ASTM, JIS or your own drawing, with a smooth burr-free surface and high elongation for trouble-free downstream processing.
- Diameter
- 0.25 – 3.00 mm
- Resistivity
- ≤ 0.01722 Ω·mm²/m
at 20 °C - Elongation
- ≥ 25 %
- Standards
- GB · IEC · DIN
ASTM · JIS
What Is Bare Copper Wire?
Bare copper wire is solid, uninsulated round copper conductor. It is the base conductor for cables and harnesses, for grounding and bonding, for overhead distribution lines, and the feedstock for stranded, parallel and enameled products. Jingda draws it from its own oxygen-free copper rod, so conductivity, surface quality and elongation are controlled from the melt onwards.
Drawn from our own rod
Jingda melts and casts its own oxygen-free copper rod and draws it on rod-breakdown and multi-wire lines from SAMP, Niehoff and Fridea. Keeping rod and wire under one roof removes a supply step and lets the drawing schedule, annealing and surface condition be matched to what the wire will be used for — a conductor that will be enameled has different surface requirements from one that will be stranded into a flexible cable.
What you get
- Low resistivity — ≤ 0.01722 Ω·mm²/m at 20 °C for efficient transmission
- High-purity copper with consistent thermal and electrical performance
- High elongation, ≥ 25 % up to ≥ 32 %, so the wire survives downstream processing
- Smooth, burr-free surface in a bright or sub-bright finish
- Spools and baskets up to Ø 1000 mm and 800 kg for efficient logistics
Jingda Copper Conductor Range
Start from the form the conductor has to take. A solid round wire is the base product; stranding adds flexibility, parallel bonding adds current capacity in a flat profile, and rod is the feedstock for all of them.
| Product | Form | Size range | Standards | Typical use |
|---|---|---|---|---|
| ViewingBare Copper Wire | Solid round wire | 0.25 – 3.00 mm | GB · IEC · DIN · ASTM · JIS | Cable conductor, grounding, drawing stock |
| Stranded Bare Copper Wire | Bunched strands | 0.14 – 11.3 mm² | GB · IEC · DIN · ASTM · JIS | Flexible cable, automotive and electronic wire |
| Parallel Wire | Parallel-bonded wires | 0.05 – 0.85 mm single wire | GB · IEC · DIN · ASTM · JIS | UHV cable, enameled wire, communication wire |
| Oxygen-free Copper Rod | Rod | 2.5 – 8.0 mm | GB · IEC · DIN · ASTM · JIS | Drawing feedstock for wire and cable |
| Enameled Copper Wire | Insulated round wire | 0.100 – 4.500 mm | IEC 60317 · NEMA MW 1000 | Motor and transformer windings |
Looking for a high-frequency conductor? See litz wire, or the full enameled wire range.
Bare Copper Wire Specifications
| Diameter range (mm) | Tolerance (mm) | Surface finish | Resistivity (Ω·mm²/m at 20 °C) | Elongation (%) | Spool / basket Ø (mm) | Max weight per spool (kg) |
|---|---|---|---|---|---|---|
| 0.25 – 0.60 | ±0.004 | Bright | ≤ 0.01722 | ≥ 25 | 400 / 630 | 100 / 450 |
| 1.60 – 2.00 | ±0.04 | Sub-bright | — | ≥ 32 | 1000 | 800 |
| 2.00 – 3.00 | ±0.05 | Sub-bright | — | ≥ 32 | 1000 | 800 |
Performance and Applications
Jingda bare copper wire is used in automotive wiring systems, in electrical grounding and bonding where a reliable path to earth is required, in overhead transmission and distribution lines, as the conductor in telecommunication cables, and in electronic components and circuits. Other constructions — different finishes, tolerances or packages — are produced on demand.
Inside the Plant
Quality and Compliance
Jingda operates an ISO 9001 and IATF 16949 certified quality system, with ISO 14001 and ISO 45001 covering environment and occupational health. Conductor properties are verified lot by lot in Jingda’s CNAS-accredited laboratories, and results are held against the lot number.
Technical Data Sheet
Diameter, tolerance, surface finish, elongation and packing are set per order. Send your requirement and a Jingda engineer will return a full data sheet with the quotation.
Talk to an EngineerQuality Certificates
Substance Compliance
RoHS and REACH statements covering the copper conductor are issued with the order.
Tongling Jingda Special Magnet Wire Co., Ltd.
We are one of the world’s leading magnet wire manufacturers, based in Tongling City — one of China’s principal copper production bases. Listed on the Shanghai Stock Exchange since 2002 (600577), the group runs a national-level enterprise technology centre, a national-level postdoctoral research station and the Jingda Magnet Wire Research Institute.
Jingda magnet wire is wound into products across new-energy vehicles, photovoltaics, robotics, aerospace, home appliances, specialty motors, 5G communications and electronics.
Ordering, Packaging and Delivery
| Commercial term | Detail |
|---|---|
| Minimum order quantity | Agreed per diameter and surface finish. Sample and pilot-order quantities are agreed case by case. |
| Lead time | Normally within 30 days from order confirmation; stock sizes dispatch earlier where available. |
| Incoterms | FOB by default; other Incoterms on request. |
| Quotation response | Within 1 business day. |
Packaging and shipment — bare copper wire
Wire is supplied on spools or in baskets of Ø 400, 630 or 1000 mm, carrying up to 100, 450 and 800 kg respectively depending on diameter. Single spools for samples or small orders are packed individually in a wooden case or on a pallet. Volume shipments use fumigation-free wooden pallets, with cartons or fibreboard collars protecting the packages and stretch film securing the load.
Maximum weights are nominal and depend on wire diameter. Exact package weight and pallet build are confirmed per order.
Frequently Asked Questions
What diameters and tolerances can Jingda supply?
What is the difference between a bright and a sub-bright finish?
Which standards do you produce to?
How is the wire packed and what are the maximum package weights?
Can Jingda supply tinned copper wire?
Can we become a Jingda distributor or agent?
How does Jingda support customers after the order?
Request a Quote or Sample
Tell us your specification — a Jingda sales engineer will respond within 1 business day with a quotation or technical feedback.
