Enameled
Copper Wire

Enameled copper wire is mainly used for transformer, motor, generator, magnetic coils, compressor, house appliance, etc.
Home » Enameled Copper Wire

Eanemeld Copper Wire - Features And Characteristic

1. Enameled copper wire includes enameled round copper wire, rectangular enamelled copper winding wire and copper square magnet wire
2. Enameled copper wire, also known as magnet wire, is a type of copper wire coated with a thin layer of insulation. The insulation is typically a polymer enamel, and it allows the wire to be used in various applications where close winding of the coils is required.
3. High Conductivity: Copper provides excellent electrical conductivity.
4. Standards: GB/T23312.7 2009, IEC60317-25, NEMA 35.
5. Insulation: The enamel coating prevents short circuits and allows for close winding.
6. Durability: The insulation is resistant to heat and solvents, making it suitable for various environments.
7.Flexibility: Available in various diameters and thermal classes to suit different applications.

enameled round copper wire
enameled flat copper wire

Why Use Enameled Copper Wire?

Enameled copper wire widely uses a preferred choice in many electrical and electronic applications due to its specific properties and benefits that make it ideal for these uses.

1. Superior Electrical Conductivity: Copper is one of the best conductors of electricity, second only to silver. This high conductivity means that enameled copper wire can efficiently carry current with minimal resistive losses, making it ideal for applications where electrical efficiency is critical.

2. Thermal Stability: Enameled copper wire can withstand high temperatures without degrading, which is important in applications where the wire will be exposed to heat. Different types of enamel coatings have varying thermal classes, allowing for selection based on the specific thermal requirements of the application.

3. Durability and Resistance: The enamel coating is resistant to abrasion, chemicals, and moisture. This durability ensures that the wire can perform reliably over a long period, even in harsh environments. The coating also protects the copper from oxidation and corrosion.

4. Space Efficiency: The thin enamel coating allows for more compact and efficient winding of coils. This space efficiency is particularly important in applications where minimizing size and weight is crucial, such as in small electric motors, compact transformers, and other electronic devices.

5. Mechanical Strength: Enameled copper wire has good mechanical strength, which helps it withstand the stresses and strains of winding and operation in various devices. This robustness ensures that the wire maintains its integrity and performance over time.

enameled copper wire services

What is the difference between bare copper wire and enameled copper wire?

Key Differences

Insulation

  • Bare Copper Wire: No insulation; exposed copper.
  • Enameled Copper Wire: Coated with an insulating enamel layer.

Applications

  • Bare Copper Wire: Suited for applications where insulation is unnecessary or undesirable, such as grounding, bus bars, and certain types of electrical connections.
  • Enameled Copper Wire: Ideal for applications requiring close winding of coils and protection against short circuits, such as in transformers, motors, inductors, and other electromagnetic devices.

Protection

  • Bare Copper Wire: More susceptible to environmental factors like oxidation and corrosion.
  • Enameled Copper Wire: Protected by the enamel coating, offering resistance to heat, moisture, chemicals, and abrasion.

Flexibility and Ease of Use

  • Bare Copper Wire: Typically more flexible and easier to handle for simple connections and grounding.
  • Enameled Copper Wire: Requires careful handling to avoid damaging the enamel coating, but allows for efficient and compact coil winding.
pure copper wire 99.99%

Hot Sale Enameled Copper Wire

Enameled Round Copper Wire

Diameter: 0.016-7.0mm
Thermal Class:155(Class F), 180(Class H), 200(Class C)
Insulation Thickness: G1, G2 or single & heavy build
round aluminum enameled wire

Enameled Flat Copper Wire

Diameter: Thickness(a):0.8-8.0mm; Width(b):2.0-22mm
Thermal Class: 155(Class F), 180(Class H), 200(Class C)
Insulation Thickness: G1, G2 or single & heavy build
enameled flat aluminum wire

Inquiry to us

The Types And Uses Of Enameled Copper Wire

Thermal Class Types of enameled copper wire Abbreviation International abbreviation Uses or Applications
105℃, 120℃ Polyvinyl Acetal enameled wire QQ PVF Widely used in oil-immersed transformers due to its excellent high temperature hydrolysis resistance, especially acetal enameled flat wires are used to make Transposed wires, used in large transformers.
130℃, 155℃ Polyester enameled wire QZ PEW Electronic communication lighting coils, sealed submersible motors, micro generators, heat-resistant transformers, contactors, solenoid valves
130℃ Polyurethane enameled wire QA UEW Relays, micromotors, small transformers, degaussing coils, ignition coils, water stop valves, magnetic heads, wires for communication equipment
130, 155 Polyurethane self-adhesive enameled wire QAN SBUEW Instrument electrical windings, micromotors, small motors, microwave ovens, electromagnetic stoves, disk motors, automobile motors and electromagnetic flowmeters, etc.
180 Polyesterimide enameled wire QZY EIW Electronics, electricians, electrical equipment, heat-resistant transformers
200 Polyesterimide/amideimide enameled wire Q(ZY/ XY ) EI/AIW Widely used in refrigerator compressors, air conditioning compressors, power tools, explosion-proof motors and motors and electrical appliances used under high temperature, high cold, radiation resistance, overload and other conditions.
220 Polyimide enameled wire Q Y PIWC Uses in windings of motors, electrical appliances, instruments, power tools, dry-type power transformers, etc. that require high heat resistance.
240 Aromatic polyimide enameled wire Q Y(F) / Nuclear power, military industry

LP Industry Supply the sizes of enameled copper wire

Name Enameled Copper Winding Wire
Conductor 99.99% pure Copper
Dimension Round type 0.016-7mm;

Rectangular: A> 0.3-10mm, B> 1-22mm;

Square: 0.45*0.45mm-6*6mm

Thermal Class 120(Class E), 180(Class H), 200(Class C), 220(Class C+),

240(Class HC)

Insulation Thickness: G1; G2 or single build; heavy build; Self-bonding
Standard IEC 60317-16,60317-16/28,MW36 60317-29 BS6811,

MW18 60317-18 ,MW20 60317-47

Certificate UL
Packing 30kg-150kg ply-wood spool(250*400 / 250*500/ 250*600/ 250*730)

IEC60317 Dimensions of enamelled wires – Preferred nominal conductor diameters

Nominal conductor diameter (mm) Conductor tolerance ±(mm) Minimum increase due to the insulation(mm) Maximum overall diameter(mm)
Grade 1 Grade 2 Grade 3 Grade 1 Grade 2 Grade 3
0.018

0.020

0.022

0.025

0.028

0.032

0.036

0.040

0.045

0.050

0.056

0.063

0.071

0.080

0.090

0.100

0.112

0.125

0.140

0.160

0.180

0.200

0.224

0.250

0.280

0.315

0.355

0.400

0.450

0.500

0.560

0.630

0.710

0.800

0.900

1.000

1.120

1.250

1.400

1.600

1.800

2.000

2.240

2.500

2.800

3.150

3.550

4.000

4.500

5.000

 

 

 

 

 

 

 

 

 

 

 

 

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.004

0.004

0.004

0.004

0.005

0.005

0.005

0.006

0.006

0.007

0.008

0.009

0.010

0.011

0.013

0.014

0.016

0.018

0.020

0.022

0.025

0.028

0.032

0.036

0.040

0.045

0.050

0.002

0.002

0.002

0.003

0.003

0.003

0.004

0.004

0.005

0.005

0.006

0.006

0.007

0.007

0.008

0.008

0.009

0.010

0.011

0.012

0.013

0.014

0.015

0.017

0.018

0.019

0.020

0.021

0.022

0.024

0.025

0.027

0.028

0.030

0.032

0.034

0.034

0.035

0.036

0.038

0.039

0.040

0.041

0.042

0.043

0.045

0.046

0.047

0.049

0.050

0.004

0.004

0.005

0.005

0.006

0.007

0.008

0.008

0.009

0.010

0.011

0.012

0.012

0.014

0.015

0.016

0.017

0.019

0.021

0.023

0.025

0.027

0.029

0.032

0.033

0.035

0.038

0.040

0.042

0.045

0.047

0.050

0.053

0.056

0.060

0.063

0.065

0.067

0.069

0.071

0.073

0.075

0.077

0.079

0.081

0.084

0.086

0.089

0.092

0.094

0.006

0.007

0.008

0.008

0.009

0.010

0.011

0.012

0.013

0.014

0.015

0.017

0.018

0.020

0.022

0.023

0.026

0.028

0.030

0.033

0.036

0.039

0.043

0.048

0.050

0.053

0.057

0.060

0.064

0.067

0.071

0.075

0.080

0.085

0.090

0.095

0.098

0.100

0.103

0.107

0.110

0.113

0.116

0.119

0.123

0.127

0.130

0.134

0.138

0.142

0.022

0.024

0.027

0.031

0.034

0.039

0.044

0.049

0.055

0.060

0.067

0.076

0.084

0.094

0.105

0.117

0.130

0.144

0.160

0.182

0.204

0.226

0.252

0.281

0.312

0.349

0.392

0.439

0.491

0.544

0.606

0.679

0.762

0.855

0.959

1.062

1.184

1.316

1.468

1.670

1.872

2.074

2.316

2.578

2.880

3.233

3.635

4.088

4.591

5.093

0.024

0.027

0.030

0.034

0.038

0.043

0.049

0.054

0.061

0.066

0.074

0.083

0.091

0.101

0.113

0.125

0.139

0.154

0.171

0.194

0.217

0.239

0.266

0.297

0.329

0.367

0.411

0.459

0.513

0.566

0.630

0.704

0.789

0.884

0.989

1.094

1.217

1.349

1.502

1.706

1.909

2.112

2.355

2.618

2.922

3.276

3.679

4.133

4.637

5.141

0.026

0.030

0.033

0.037

0.042

0.047

0.053

0.058

0.066

0.072

0.081

060.0

0.098

0.108

0.120

0.132

0.147

0.163

0.181

0.205

0.229

0.252

0.280

0.312

0.345

0.384

0.428

0.478

0.533

0.587

0.653

0.728

0.814

0.911

1.018

1.124

1.248

1.381

1.535

1.740

1.944

2.148

2.392

2.656

2.961

3.316

3.721

4.176

4.681

5.186

IEC60317 Dimensions of enamelled wires with a bonding layer – Preferred nominal conductor diameters

Nominal conductor diameter mm Conductor tolerance ± mm Minimum increase underlying coating mm Minimum Increase bonding layer mm Maximum overall diameter mm
Grade 1B Grade 2B Grade 1B Grade 2B
0.020

0.022

0.025

0.028

0.032

0.036

0.040

0.045

0.050

0.056

0.063

0.071

0.080

0.090

0.100

0.112

0.125

0.140

0.160

0.180

0.200

0.224

0.250

0.280

0.315

0.355

0.400

0.450

0.500

0.560

0.630

0.710

0.800

0.900

1.000

1.120

1.250

1.400

1.600

1.800

2.000

 

 

 

 

 

 

 

 

 

 

 

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.004

0.004

0.004

0.004

0.005

0.005

0.005

0.006

0.006

0.007

0.008

0.009

0.010

0.011

0.013

0.014

0.016

0.018

0.020

0.002

0.002

0.003

0.003

0.003

0.004

0.004

0.005

0.005

0.006

0.006

0.007

0.007

0.008

0.008

0.009

0.010

0.011

0.012

0.013

0.014

0.015

0.017

0.018

0.019

0.020

0.021

0.022

0.024

0.025

0.027

0.028

0.030

0.032

0.034

0.034

0.035

0.036

0.038

0.039

0.040

0.004

0.005

0.005

0.006

0.007

0.008

0.008

0.009

0.010

0.011

0.012

0.012

0.014

0.015

0.016

0.017

0.019

0.021

0.023

0.025

0.027

0.029

0.032

0.033

0.035

0.038

0.040

0.042

0.045

0.047

0.050

0.053

0.056

0.060

0.063

0.065

0.067

0.069

0.071

0.073

0.075

0.002

0.002

0.002

0.003

0.003

0.003

0.003

0.003

0.003

0.003

0.005

0.005

0.005

0.005

0.005

0.008

0.009

0.010

0.010

0.010

0.011

0.012

0.013

0.013

0.014

0.015

0.016

0.016

0.017

0.017

0.018

0.019

0.020

0.020

0.021

0.022

0.022

0.023

0.023

0.024

0.025

0.026

0.030

0.034

0.038

0.044

0.050

0.055

0.062

0.068

0.075

0.085

0.094

0.105

0.117

0.129

0.143

0.158

0.175

0.197

0.220

0.243

0.270

0.300

0.331

0.369

0.413

0.461

0.514

0.568

0.630

0.704

0.788

0.882

0.987

1.091

1.214

1.346

1.499

1.702

1.905

2.108

0.029

0.033

0.037

0.042

0.048

0.055

0.060

0.068

0.074

0.082

0.092

0.101

0.112

0.125

0.137

0.152

0.168

0.186

0.209

0.233

0.256

0.284

0.316

0.348

0.387

0.432

0.481

0.536

0.590

0.654

0.729

0.815

0.911

1.017

1.123

1.247

1.379

1.533

1.738

1.942

2.146

Inquiry to us

Manufacturing Process of Enameled Copper Wire

enameled wire manufacturing process

1. Material Preparation

  • Selection of Raw Material: High-purity copper or aluminum is chosen as the base material for its excellent electrical conductivity.
  • Casting and Rolling: The raw metal is cast into rods or bars, which are then rolled into the desired flat or rectangular cross-section.

2. Drawing

  • Initial Drawing: The metal is drawn through a series of dies to reduce its cross-sectional area while maintaining the flat shape. This process can involve multiple stages to achieve the required dimensions.

3. Annealing

  • Heat Treatment: The drawn wire is subjected to annealing, a heat treatment process that softens the metal, relieving internal stresses and enhancing its ductility and workability.

4. Cleaning

  • Surface Cleaning: The wire is thoroughly cleaned to remove any oxides, lubricants, or contaminants from its surface. This step is crucial to ensure proper adhesion of the enamel coating.
    • Chemical Cleaning: Often involves an acid bath or similar chemical treatment.
    • Mechanical Cleaning: May include brushing or abrasive techniques.

5. Enameling

  • Coating Application: The cleaned wire is passed through an enameling machine where it is coated with a layer of insulating enamel.
    • Dipping or Spraying: The wire may be dipped into the enamel solution or have the enamel sprayed onto it.
    • Multiple Coatings: Multiple layers of enamel may be applied, with each layer being cured before the next one is applied.

6. Curing

  • Heat Treatment: After each enamel application, the wire is passed through an oven or furnace where the enamel is cured. This process involves heating the wire to a specific temperature to harden and stabilize the enamel coating.
    • Controlled Environment: The curing environment is carefully controlled to ensure consistent and defect-free coatings.

7. Quality Control

  • Inspection and Testing: The enameled wire undergoes rigorous inspection and testing to ensure it meets all specified standards and requirements.
    • Dimensional Checks: Verifying the width, thickness, and overall dimensions of the wire.
    • Electrical Testing: Ensuring proper insulation resistance and dielectric strength of the enamel coating.
    • Mechanical Testing: Assessing the flexibility, adhesion, and durability of the enamel.

8. Spooling and Packaging

  • Spooling: The finished enameled flat wire is wound onto spools or reels in preparation for storage or shipment.
  • Packaging: The spools are then packaged securely to protect the wire during transportation and storage.

9. Final Inspection

  • Random Sampling: Samples from each batch are taken for final quality assurance tests to ensure consistency and reliability of the product.

LP Industry has the lastest advanced winding machine for enameled wire, take up machine, baking machine, extruding machine, drawing machine and testing equipment, etc. Testing equipment has computer conductor resistance tester, tensile testing machine, solderability tester, tangent delta tester, thermal cut-through tester, elongation tester, automatic voltage tester, automatic rebound tester. Customers can buy the enameled copper wire with directly factory price from LP Industry, and clients can also custom AWG and SWG enameled copper wire, Max. size of round enameled copper wire is 7mm, the Max. size square copper wire is 6mm*6mm, flat wire is needed the size from clients’ requirements.