What is Enameled Round Copper Wire?
Enameled round copper wire, round copper magnet wire or round copper winding wire is a particular type of copper conductor covered with one or more layers of electrical insulation enamel. This coating is developed specially to ensure the electrical insulation of the copper wire when it is wound into a coil.
Enamelled round copper wire is being largely used for Electric motors, Transformers, Generators, Inductors, relays, solenoids, compressors, Domestic appliances and other Electromagnetic equipment.
The correct wire diameter, insulation material, thermal class and the build of insulation will be dictated by temperature, voltage, winding design and application demand.
Technical Specifications
| Name | Enameled Round Copper Wire |
| Conductor | Copper |
| Dimension | Thickness(a):0.016-7mm |
| Thermal Class | 120°C(Class E), 180°C(Class H), 200°C(Class C), 220°C(Class C+), 240°C(Class HC) |
| Insulation Thickness: | Grade 1 / Grade 2 / Single Build / Heavy Build / Self-Bonding |
| Standard | IEC / NEMA MW 1000 / JIS / GB |
| Certificate | UL / RoHS / REACH* |
| Insulation | PEW / UEW / EIW / AIW / PAI / PI* |
| Packing | 30kg-150kg ply-wood spool(250*400 / 250*500/ 250*600/ 250*730) |
What is enameled copper wire used for?
Electric Motors
Available in the form of winding wire for stator and rotor windings where good electrical insulation and thermal resistance are necessary.
Transformers
For primary and secondary transformer windings (distributions transformers, power transformers, dry-type transformers).
Generators
Appropriate for windings of generators where a stable electrical insulating resistance are requested and thermal aging is undesired.
Inductors & Coils
Designs with additional axial insulation (above and below) suitable for winding in electromagnetic coils, inductors, relays and solenoids in a number of small sizes.
EV & Automotive Motors
Electric vehicle traction motors and other automotive electrical equipment may make use of copper wire with a higher thermal-class of enamel.
Household Appliances
Applications include gas turbines, compressors, fans, pumps, washing machines, air conditioners and other motor-driven domestic appliances.
How to Choose Enameled Round Copper Wire?
| Selection Factor | What to Consider |
| Wire Diameter | Current, winding space and coil design |
| Thermal Class | Maximum operating temperature |
| Insulation Type | Electrical, thermal and chemical requirements |
| Grade | Grade 1, Grade 2 or Heavy Build |
| Voltage | Required dielectric strength |
| Application | Motor, transformer, generator, coil, etc. |
| Standard | IEC, NEMA, JIS or GB |
| Winding Process | Automatic or manual winding |
Note: Need help selecting the right magnet wire? Send us your diameter, thermal class, insulation type and application requirements.
Enameled Copper Wire Thermal Classes
| Thermal Class | Typical Applications |
| 120°C | General electrical equipment |
| 180°C | High-temperature motors and transformers |
| 200°C | High-temperature electrical equipment |
| 220°C | High-temperature motors and generators |
| 240°C | High-temperature and demanding electrical applications |
Enameled Round Copper Wire Insulation Types
UEW – Polyurethane
Has a good solderability and widely used in the coils, transformers, relays, and electronic components.
PEW – Polyester
A general purpose winding material used in applications where good thermal and mechanical properties are required.
EIW – Polyesterimide
This is of higher thermal resistance and is used in the construction of motors, transformers and other industrial electrical appliances.
AIW – Polyamide-imide
High-performance chemical and corrosion resistant product designed for harsh applications with high thermal, chemical and mechanical resistance.
PI – Polyimide
A excellent choice when even the best thermal performanceis desired.
Grade 1 vs Grade 2 Enameled Copper Wire
| Feature | Grade 1 | Grade 2 |
| Insulation Thickness | Standard | Thicker |
| Electrical Insulation | Good | Higher |
| Winding Space | More compact | Requires more space |
| Dielectric Strength | Standard | Higher |
| Typical Use | General applications | Higher insulation requirements |
Quality Control
LP Industry applies quality control throughout the manufacturing process, from copper conductor inspection and enamel coating to dimensional inspection, electrical testing and final spool inspection.
Conductor Diameter Test
Insulation Thickness Test
Breakdown Voltage Test
Pin Hole Test
Elongation Test
Abrasion Test
Heat Shock Test
Winding Test
OEM & Wholesale Enameled Copper Wire
LP Industry offers enameled round copper wire for manufactures, distributors, wholesale and industrial electrical providers. We provide OEM specification, customized insulation systems, spool dimensions and packaging requirements.
For manufacturers
Technical specification matching
Stable batch production
Customized wire sizes
For distributors
Private labeling
Flexible packaging
Bulk orders
For wholesalers
Factory-direct supply
Export packaging
Design of enameled round copper wire
Copper: The wire is made of copper.
Enamelled: why use the enamel? Because the enamel material stops the wire from short-circuiting with nearby wires or conductive materials. And it also provides protection against environmental factors such as moisture and oxidation.
Round: The round shape allows for easy winding and coiling.
Packing
Plywood wooden spool / bobbin, spool / bobbin common sizes: 250*400; 250*500; 250*600, one spool / bobbin wire weight 30 ~ 150kgs
Outer packing: pallet or plywood box, adopts by sea, but small sample by air
| Reel Type | Range of Diameter( mm) | Weight of Wire Spool (KG for Copper wire) | Diameter (mm) | |||||
| D1：Top Flange | D2：Bottom Flange | d1：Top Core | d2：Bottom Core | W | h(d3)：Center bore | |||
| PT-10 | 0.1~0.3 | 9~15 | 160±0.3 | 180±0.3 | 96±0.5 | 110±0.5 | 200±0.4 | 30±0.5 |
| PT-15 | 0.1~0.6 | 15~24 | 180±0.3 | 200±0.3 | 96±0.5 | 110±0.5 | 200±0.4 | 30±0.5 |
| PT-25 | 0.2~3.0 | 30~36 | 215±0.3 | 230±0.3 | 110±0.5 | 130±0.5 | 250±0.4 | 32±0.5 |
| PT-30 | 0.2~3.0 | 36~45 | 245±2.0 | 225±2.0 | 100±1.0 | 120±0.5 | 250±2.0 | 33±0.5 |
| PT-60 | 0.2~3.0 | 60~75 | 269±0.8 | 296±0.8 | 150±0.8 | 178±0.8 | 350±1.0 | 45±0.5 |
| PT-90 (A315) | 1.2~3.5 | 90~150 | 300±2.0 | 315±2.0 | 180±1.0 | 200±1.0 | 425±2.0 | 100±0.5 |
| PT-200 (A400) | 1.2~3.5 | 165~200 | 375±2.0 | 400±2.0 | 225±1.0 | 250±1.0 | 530±2.0 | 100±0.5 |
| PT-270 | 1.2~3.5 | 270~300 | 435±2.0 | 460±2.0 | 225±1.0 | 280±1.0 | 528±2.0 | 100±0.5 |
| 250*400 MDF wooden | 3.0~6.0 | 75~105 | 400±2.0 | 400±2.0 | 210±1.0 | 280±1.0 | 250±2.0 | 100±0.5 |
| 250*500 MDF wooden | 3.0~6.0 | 120~180 | 500±2.0 | 500±2.0 | 210±1.0 | 210±1.0 | 250±2.0 | 60±0.5 |
| 250*600 MDF wooden | 3.0~8.0 | 240~300 | 600±2.0 | 600±2.0 | 210±1.0 | 210±1.0 | 250±2.0 | 60±0.5 |
| 250*730 MDF wooden | 3.0~8.0 | 270~400 | 730±2.0 | 730±2.0 | 210±1.0 | 210±1.0 | 250±2.0 | 60±0.5 |
| 250*730 MDF wooden | 3.6~8.0 | 330~420 | 730±2.0 | 730±2.0 | 210±1.0 | 210±1.0 | 250±2.0 | 60±0.5 |
| 500*500 MDF wooden | 1.0~8.0 | 300~360 | 500±2.0 | 500±2.0 | 210±1.0 | 210±1.0 | 500±2.0 | 60±0.5 |
