MTW (Machine Tool Wire) is widely used in North American and international industrial wire markets due to its excellent flexibility and high-temperature resistance. It is commonly applied in industrial machinery, automation equipment, and electrical control panels. MTW wire combines durability with UL and cUL certifications, ensuring compliance with safety standards in the U.S. and Canadian markets.
However, customers often encounter multiple names or model numbers for MTW wire depending on the application or manufacturer, such as UL MTW, MTW-90, or UL 1015. Understanding the alternative names and technical specifications of MTW wire helps engineers select the correct type, ensures project safety, and guarantees long-term reliability.
Overview of MTW Wire
MTW wire is specifically designed for industrial machinery and electrical equipment, offering the following features:
- High-temperature resistance: Standard ratings of 90°C, with some models able to withstand higher temperatures.
- High flexibility: Ideal for routing inside complex machinery and automated equipment.
- UL & cUL certification: Complies with North American safety standards.
- Versatile environment usage: Suitable for dry and damp locations, not recommended for continuous immersion.
Construction and Materials
MTW wires are composed of:
| Component | Material | Features |
|---|---|---|
| Conductor | Copper (solid or stranded) | Excellent conductivity, reduces heat generation |
| Insulation | PVC / PVC blend | High temperature resistance, durable, flame-retardant |
| Jacket | Industrial-grade protective layer | Oil-resistant, chemical-resistant, suitable for harsh environments |
This construction ensures both safety and ease of installation in industrial applications.

Alternative Names for MTW Wire
Depending on manufacturer, application, or certification, MTW wire may be referred to by several other names:
| Alias / Model | Description | Common Use |
|---|---|---|
| UL MTW | MTW wire certified to UL standards | Industrial machinery, control panels |
| MTW-90 | MTW rated for 90°C | High-temperature internal wiring |
| UL 1015 | Single conductor wire, can substitute MTW | Machine tools, distribution equipment |
| UL 1016 | Flexible wire, MTW alternative | Automation equipment wiring |
| Machine Tool Wire | Full name of MTW | Industrial machinery wiring |
| UL MTW Flexible | Emphasizes flexibility for complex routing | Control panels, robotics |
Application Notes:
MTW and UL 1015 are often interchangeable in industrial wiring, though UL 1015 is more suitable for short-distance, light-load circuits.
Flexible UL MTW wires are easier to install and maintain in robotic or automated systems, reducing mechanical wear.
MTW Wire Compared to Other UL Wires
To help customers select the appropriate wire, the following comparison illustrates key differences:
| Wire Model | Type | Key Features | Typical Applications |
|---|---|---|---|
| MTW | Industrial machinery wire | Flexible, high-temperature, UL & cUL certified | Machine tools, control panels, automation equipment |
| NM-B | Residential/commercial wire | Cost-effective, easy installation | Homes, commercial buildings |
| THHN | Industrial/commercial wire | Heat-resistant, corrosion-resistant, oil-resistant | Control panels, building wiring |
| UF-B | Outdoor wire | Waterproof, UV-resistant | Underground, outdoor distribution |
| XHHW | High-temperature, wet-rated | Flexible, chemical-resistant | Industrial machinery, electrical control |
MTW excels in industrial applications where both flexibility and high-temperature resistance are critical, whereas THHN and XHHW are more suited for fixed or outdoor wiring.

Practical Applications of MTW Wire
The table below shows typical MTW wire applications and recommended models:
| Project Type | Environment | Recommended MTW Model | Temperature / Current Rating | Application Notes |
|---|---|---|---|---|
| Industrial machinery internal wiring | Dry / Damp | MTW-90 / UL MTW Flexible | 90°C / 10–20A | Flexible for complex routing |
| Automation production lines | Dry | UL 1015 / MTW | 90°C / 15A | Short-distance signal and control circuits |
| Electrical control panels | Dry / Damp | MTW / THHN | 90°C / 20A | Compatible with distribution equipment, easy to install |
| Robotic wiring | Dry / Damp | UL MTW Flexible | 90°C / 10–15A | High flexibility reduces mechanical wear |
| Industrial instruments | Dry | MTW-90 | 90°C / 5–10A | Low-current control circuits, signal stability |
These examples highlight MTW wire's versatility and adaptability in various industrial scenarios.
How to Choose the Right MTW Wire
When selecting MTW wire, consider:
1.Current Load Capacity: Calculate the required AWG size based on device power and circuit length to ensure safety.
2.Environment:
- Dry/Indoor: Standard MTW is sufficient.
- Damp / Partially Wet: Choose flexible, UL-certified MTW for long-term reliability.
3.Temperature Rating: 90°C is typical; ensure the chosen wire meets operational temperature requirements.
4.Flexibility Requirement: For complex routing or moving components, select flexible UL MTW for easy installation and maintenance.
5.Certification Compliance: Ensure UL & cUL certifications for North American projects.
Combining project schematics, load requirements, and environmental conditions ensures safe and efficient wiring without overheating or premature wear.
Advantages of MTW Wire
MTW wires offer multiple benefits backed by professional expertise and export experience:
- Comprehensive UL wire options: NM-B, THHN, UF-B, XHHW, covering diverse industrial and building applications.
- Certification Assurance: Dual UL & cUL certification ensures North American safety compliance.
- Full range of sizes: 14 AWG – 6 AWG for various power requirements.
- Strong delivery capability: Fast shipment for small, medium, or bulk orders.
- Professional support: Pre-sale and post-sale guidance for selection and installation.
- Global experience: Years of manufacturing and exporting expertise with international partners.
- Project support: Professional guidance and on-site installation advice for projects of any scale.
Contact Us
For MTW wire purchase inquiries or technical support, contact:
Dongguan Greater Wire & Cable Co., Ltd.
- Tel/WhatsApp/WeChat: +86 135 1078 4550 / +86 136 6257 9592
- Email: manager01@greaterwire.com
We provide high-quality industrial wires globally, with all products compliant with UL & cUL standards. No matter the project size, we offer professional technical support and dedicated service to ensure your projects succeed.






















