What is SWG 10 motor winding wire?
SWG 10 motor winding wire (Also called SWG 10 copper winding wire or magnet wire SWG 10) is a kind of Enamel Coated Copper Winding Wire (Enamel Magnet Wire) for winding coils in electric motors, transformers, inductors and other electromagnetic devices. It has great electric conductivity, mechanical strength and insulations, so is commonly used in industrial motor, household appliance motor and so on.
What does SWG 10 mean?
SWG, also known as Imperial Wire Gauge or Standard Wire Gauge, is a wire diamete measurement system that was developed in Britain. It is used widely in the UK, the Commonwealth and the motor manufacturing industry. In SWG the closer to the higher the gaase number gets the thinner the wire is, and the closer to the lower the gauge is the thicker is is.
SWG 10 stands for Standard Wire Gauge No 10 medium thick winding wire that is used to wind motors where some displacement for current is needed, but there isn‘t much space for installation.
Standard Wire Gauge (SWG)
The Standard Wire Gauge is a non-linear (nearly logarithmic) wire gauge system that is mainly used to measure metal wires and sheet metal thickness. It is also based on thousandth of an inch (mil or thou) and is quite different to the more common American Wire Gauge system. Partial replacement by the metric system in many countries has replaced SWG in certain areas, but the system is still used in certain traditional areas such as motor windings and guitar strings.
SWG 10 Wire Size and Technical Specifications
| Property | Value |
| Gauge | SWG 10 |
| Diameter | 3.25 mm |
| Conductor | Copper |
| Insulation | Enameled |
| Thermal Class | 130°C/155°C/180°C/200°C |
| Standard | IEC/NEMA/JIS |
| Shape | Round |
Material Options: Copper vs Aluminum
When selecting SWG 10 wire, you can choose between enameled copper and enameled aluminum conductors.
Each offers unique benefits depending on your motor design and cost targets.
| Property | Enameled Copper Wire | Enameled Aluminum Wire |
|---|---|---|
| Conductivity | 100% (IACS standard) | ~61% of copper |
| Density | Heavier | 35% lighter |
| Cost | Higher | More economical |
| Tensile Strength | High | Moderate |
| Applications | Precision motors, industrial drives | Lightweight motors, compressors, fans |
For high-efficiency electric motors, enameled copper wire remains the preferred option because of its superior conductivity and mechanical strength.
Key Features of SWG 10 Copper Winding Wire
Excellent Electrical Conductivity
Copper winding wire of SWG 10 gauge (electrolytic copper purity 99.9%) is used. Excellent electrical conductivity of the copper ensures low resistance (I2 R) losses and thus produces maximum efficiency of the motor. Along with maximum efficiency this winding wire helps the electrical equipment to reduce maximum power consumption.
High Thermal Resistance
The wire is supplied with a range of different enamel insulation classes, ranging from usually 130 degreesC up to 200 degreesC or more (typically Class F or Class H). This high heat-resistance makes the wire ideal for high temperature motors and continuous-duty applications where it will need to be reliable at high temperatures.
Superior Dielectric Strength
Besides, the high quality insulation of enamels all over the proved insulation for between turn short circuit and electrical argon breakdown. This insulation can run safely and steady in high voltage stress.
Strong Mechanical Strength
Having such good ductility and high tensile strength, SWG 10 magnet wire can generally be utilized by high-speed winding machines without occurrence of breakage and elongation. It can form tight and uniform coils with high space factor during winding process.
Long Service Life
SWG 10 copper winding wire is designed with tough copper conductor and tough polymer insulation which ensures better resistance to thermal aging, chemicals and mechanical wear & tear. This results in increased life to equipment with minimum maintenance and higher dependability of motors & transformers.
These features of SWG 10 motor winding wire makes it ideal for high quality and performance motor manufacturing as well as for rewinding purpose.
Applications of SWG 10 Motor Winding Wire
SWG 10 wire is used in medium-to-large electric motors, transformers, and generators that require robust current flow and strong thermal resistance.
Industrial Motors
With high breakdown voltage, SWG 10 motor winding wire is common for use in industrial-based motors used for manufacturing, mining and heavy machinery. Its excellent mechanical properties with high resistance to heat well also allow it to be used for continuous-duty as well.
AC Motors
In all AC motors (induction orsynchronous motors) use SWG 10 copper winding wire in theirstator and rotor windings, for high efficiency, low energy consumptionandrop performancefor factory equipment, air conditioning systemsandconveyor drives.
DC Motors
SWG 10 magnet wire provides marvelous electrical conductance and even insulation for the operation of DC motors. In many electric vehicle, tramway, cranes, traction applications, it has been used in armature and field windings for high accurate speed regulation.
Generator Coils
SWG 10 motor winding wire is often used for the generator coils on stationary and portable power generators. Its excellent dielectric strength and high thermal endurance allow for consistent power generation and maintain stable over varying loads.
Pump Motors
Pump motors using SWG 10 copper winding wire provide the water, irrigation and wastewater systems with a corrosion and chemical resistant medium able to withstand large temperature swings.
Compressors
In compressor motor winding we can use SWG 10 motor winding wire. It can provide required current carrying capacity as well as heat resistant. SWG 10 motor wiring can be used for hermatic and semi hermatic compressor motors, for which motor should have high temperature and running cycles.
Transformers
Different sized transformers employ SWG 10 magnet wire for the primary and secondary windings. The very fine gauge of the wire and excellent insulation helps to reduce losses, maintain voltage regulation, and distribute power efficiently and effectively.
Automotive Electric Motors
Due to growing demand on electric vehicles, the SWG 10 copper winding wire usage has been extended to electric motor for automotive application, such as traction motor, traction machine, drive motor and auxiliary system applied to new energy vehicle (NEV). It provides high current density, mechanical and thermal properties.
Thermal Classes Available for SWG 10 Winding Wire
SWG 10 motor winding wire is produced in various thermal classes depending upon the operating temperature requirements. The class reflects the maximum temperature at which the enamel insulation can operate continuously without loss of dielectric and mechanical properties. Higher the class, the higher the heat resistance of wire.
Overview of Thermal Classes
The most common thermal classes for SWG 10 winding wire are:
Class 130 (Class B)
Class 155 (Class F)
Class 180 (Class H)
Class 200 (Class N or above)
They respect the requirements of the IEC 60317, NEMA MW standards.
Class 130 (Class B)
Class 130 is the lowest cost rated for a maximum continuous operating temperature of 130 degreesC. It offers satisfactory performance over a wide range of general purpose applications that generate moderate heat as a result of operation. This class is ideal for light duty motors, transformers and general industrial apparatus where cost is a primary factor.
Class 155 Magnet Wire
Class 155 (Class F) is one of most commonly used SWG 10 copper winding wire thermal ratings. Capable of operating at a maximum temperature of 155 degreesC this offers a great trade off between cost and performance. Suitable for industrial motors, pumps and compressors, as well as a wide range of normal AC & DC motors operating at higher temperatures.
Class 180 Magnet Wire
Class 180 (Class H) offers good heat resistance with a maximum continuous temperature of 180°C. This class is used for high reliability applications such as heavy duty industrial and automotive electric motors and equipment designed to operate in a hot environment. The higher thermal stability ensures a longer service life with an increased overload capacity.
Class 200 Magnet Wire
As the most head of standard class, Class 200 can run hours at 200 degreeC, class 200 provides the best thermal performance. It is usually applied in helllike use condition, such as high temperature generator, new energy vehicle traction motor and professional transformers, and provides excellent long-term reliability n the harsh thermal environment.
SWG 10 motor winding wire is a versatile and efficient choice for medium- to large-sized motor applications.
With a diameter of 3.25 mm, it delivers strong conductivity and durability — especially when made from high-quality enameled copper.
SWG 10 vs AWG 10 Motor Winding Wire
When deciding on the motor winding wire, perhaps the most common question asked is the difference between SWG 10 and AWG 10. Even though they are both called “10”, they are from two distinct gauge wire systems and vary greatly in size, electrical characteristics and topics of application.
| Parameter | SWG 10 | AWG 10 | Difference |
| Bare Conductor Diameter | 3.251 mm (0.128 in) | 2.588 mm (0.102 in) | SWG 10 is ~25.6% thicker |
| Cross-Sectional Area | ≈ 8.30 mm² | ≈ 5.26 mm² | SWG 10 is ~58% larger |
| DC Resistance (20°C) | Lower (~2.08 Ω/km) | Higher (~3.28 Ω/km) | SWG 10 has better conductivity |
| Current Capacity | Higher | Lower | SWG 10 handles more current |
| Common Usage Regions | UK, India, Commonwealth, traditional motor industry | North America, global modern standards | Regional preference |
Quality Standards and Testing for SWG 10 Motor Winding Wire
SWG 10 Motor winding wire has stringent international quality criteria for performance and safety. International standards are adopted and manufactures carry out detailed, exhaustive in house testing, for quality assurance. The wire is used in electric motors, transformers and many other electromagnetic applications.
International Quality Standards
SWG 10 winding wire is manufactured and certified according to the following major standards:
IEC 60317
IEC 60317 1-3A from The International Electrotechnical Commission (IEC) standard defines magnet wire specifications, electrical, dimensional, thermal life, testing methodology. It describes the various types of Enamel insulation and thermal classifications (from 130 degrees to 200 degrees C), and the parameters to which magnet wire should perform. If magnet wire meets IEC60317; it ensures worldwide use and premium reliability.
NEMA MW1000
The main standard in North America for magnet wire is the National Electrical Manufacturers Association (NEMA) MW 1000. This standard defines a range of specifications for magnet wire including dimensions, dielectric strength, thermal and mechanical properties. The majority of manufacturers will produce IEC/NEMA compliant SWG 10 magnet wire which will be more widely acceptable.
RoHS
Restriction of Hazardous Substances (RoHS) compliance is a requirement to make sure SWG 10 motor winding wire does not contain substances that are harmful such as lead, mercury, and cadmium as well as some flame proofing agents. This is important for environmental reasons as well as for selling markets in Europe and other regions.
REACH
Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH). REACH assures the wire adheres to the most stringent EU safety standards for chemicals. It reduces the health and environmental hazards associated with the full lifecycle of the product.
Other certifications such as UL, CE, ISO 9001 are sometimes exist depending on the maker.
Factory Testing Procedures
In order to ensure quality standards, producers test each batch of SWG 10 copper winding wire thoroughly with most diverse tests:
Diameter Testing
Accurate measurement of the bare conductor diameter (nominal 3.251 mm) and overall insulated diameter is performed with precision laser micrometers or optical measuring systems. This confirms the wire can be produced to very tight tolerances (+/-0.020 mm or better) for optimal slot fill, winding consistency and motor operation.
Breakdown Voltage Testing
Tests the dielectric strength of the enamel insulation. The wire is gradually increased in voltage until there is a breakdown. Very high breakdown voltages indicate that the insulation is preventing any short circuits taking place under intended operating and surge voltage conditions – a requirement for SWG 10 motor winding wire used in high power applications.
Elongation Testing
The wire is pulled out to test for elongation in percentage before it snaps. A high elongation indicates it‘s ductile enough to take the strain of a winding machine at high speeds, without snapping or cracking. It‘s so that the coil can be reliably wound.
Heat Shock Testing
The coated wire was subjected to high temperature (in accordance with its thermal class) and then quenched or wound up a mandrel in order to stress it thermally, testing the adherence of the enamel. it checks the piercing of the insulation, wrinkles or loss of adhesion that occurs when the wire is stressed thermally which is related directly with the life expectancy of a wire when used at high temperature.
Other routine tests may include:
Measuring electrical resistance
Tests for adhesion and flexibility
Resistance to solvents
Thermal Endurance (accelerated aging)
Compliance IEC 60317, NEMA MW1000, RoHS, REACH, as well as some destructive factory testing (diameters, breakdown voltage, elongation, heat shock…) confirm that the winding wire SWG 10 motor winding wire presents excellent standard levels of conductivity, insulation and life duration. When ordering this winding wire, always ask for test reports and certificates of compliance.
Why Choose LP Industry as Your SWG 10 Motor Winding Wire Supplier?
The selection of a good quality SWG 10 motor winding wire (or SWG 10 copper winding wire, magnet wire SWG 10) supplier is critical for your project. As a specialized magnet wire manufacturer, LP Industry is a good choice for high quality SWG 10 winding wire supply, providing quality, cost advantages and good customer service at all times.
Factory Direct Supply
By professional manufacture, LP Industry can provide factory direct supply of SWG 10 winding wire, no middlemen, cut your cost, and fully traceability from raw material to finished goods. So more fresher stock, more strict quality control, better price than distributors.
Stable Copper Material
We provide only 99.9% electrolytic copper, purchased from stable long term suppliers. We can give outstanding conductivity and very low resistance, consistent quality between all spools of SWG 10 copper winding wire. Our stable supply chain enables you to bar any fluctuations in quality and pricing of the global copper market.
Custom Specifications
LP Industry provides flexible custom specifications to meet your exact requirements:
The thermal Classes: 130, 155, 180 or 200
The thickness of the material which insulte the vehicle, (insulation thickness): Grade 1, 2
Special diameters, colors, packagings, etc
Both IEC 60317 and NEMA MW1000 standards.
Standard SWG 10 or custom versions for specific motor construction Our engineering team can modify the wire to your application.
Fast Global Delivery
We keep all popular SWG 10 magnet wire specifications readily available for swift dispatch. Coupled with our experienced logistics partners, we provide speedy worldwide delivery within days for standard products! We offer expert export paperwork and assistance to ensure faultless import procedures.
OEM & ODM Support
LP Industry provides OEM & ODM support for brands and equipment producers. Whether is custom labeling and spooling or prototype development, we will help you create your line of high performance winding wires with the respect for the secrecy and quality you require.
Competitive Pricing
With our volume, vertical integration and efficient operations as we have, we offer very competitive prices without sacrificing quality. You get the best SWG 10 motor winding wire at lower factory-direct prices that boost your cost efficiency and profit margins.
What makes LP Industry the ideal partner?
Proven compliance with IEC 60317, NEMA MW1000, RoHS, and REACH
Stringent ‘in-house’ testing (diameter, breakdown voltage, elongation, heat shock, etc)
Provides specialized techni cal assistance in motor design and rewi ning b asic guidance
Long-term reliability trusted by industrial customers across multiple continents.
Frequently Asked Questions
What is the gauge of the SWG 10 winding wire?
The bare conductor diameter of SWG 10 motor winding wire is 3.251mm (0.128inch). The diameter of total, with enamel insulation is a little bit larger, according to the grade.
What is SWG 10 in AWG?
There isn‘t a precise equivalent. SWG 10 is considerably thicker than AWG 10 (2.588 mm). However it is similar to about AWG 8 at around 3.264 mm.
Which motors are using SWG 10 wire?
The SWG 10 copper winding wire with rubber insulation is widely used in the industrial motor, AC motor, DC motor, pump motor, compressor motor, generator coil, and automotive electric motor (electric vehicle.).
Can SWG 10 be applied in high temperature?
Yes. SWG 10 magnet wire thermally rated up to Class 200 (200 degreesC), applying it to demanding, high-profile environments.
Is it possible to have SWG 10 wire tailored?
Yes. We provide a number of option specifications for each product including different thermal classes, Insulation grades (Grade 1/2/3), Spool sizes and special packing.
What types of insulation classes does the equipment have?
Typical thermal classes of SWG 10 winding wire include Class 130, Class 155, Class 180 and Class 200.
Request a Quote for SWG 10 Motor Winding Wire
Are you searching for a trusted source of SWG 10 motor winding wire? If so, LP Industry is the firm to rely on, as they supply top grade enameled copper winding wire with stable characteristics, interesting prices and swift delivery.
We provide custom insulation classes, OEM, free samples, flexible minimum order quantity for your specific needs on motor winding.
Get in touch with us today for quick quote and professional technical support.
Free Samples Available | MOQ from 500kg | OEM Supported | Fast Response
