SHOP ALL HIGH TEMP

Wire America supplies a wide range of specialized High Temperature Wire (Switchboard SIS, TGGT, MG, SRG-K, UL 1330 and SRML). Built with durable Teflon PTFE, silicone rubber, mica glass, & fiberglass braid, these cables are certified for continuous use in extreme heat, with temp ratings ranging from 125°C (257°F) up to 550°C (1000°F). Essential for industrial furnaces, commercial ovens, kilns, motor leads and high-heat OEM environments.

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High Temperature Wire is a specialized type of electrical wire engineered to withstand extreme heat conditions where standard wires would fail. It is constructed with durable insulation materials like Teflon PTFE, silicone rubber, mica glass, and fiberglass braid to ensure continuous, reliable performance in elevated temperatures. These wires are crucial for maintaining safety and operational efficiency in demanding thermal environments.

Standard electrical wires, typically rated for 60°C to 90°C, use insulation materials like PVC or rubber that melt, crack, or degrade rapidly when exposed to extreme heat. This degradation can lead to insulation failure, short circuits, equipment damage, and significant safety risks. High Temperature Wire is specifically designed with heat-resistant materials to prevent these issues, ensuring longevity and stable electrical performance in hot environments.

High Temperature Wire is certified for continuous use across a broad spectrum of extreme heat, with ratings typically ranging from 125°C (257°F) up to 550°C (1000°F). The specific temperature rating depends on the insulation material and construction, ensuring the wire can safely operate without compromising its performance or structural integrity in its intended environment.

High Temperature Wire utilizes advanced insulation materials to resist heat and maintain electrical integrity. Common types include:

  • Teflon PTFE (Polytetrafluoroethylene): Offers excellent chemical resistance and handles moderate to high temperatures, typically up to 260°C.
  • Silicone Rubber: Known for exceptional flexibility and thermal stability, often rated up to 200°C.
  • Mica Glass & Fiberglass Braid: Provides superior thermal insulation and mechanical strength, suitable for extremely high temperatures, with some mica-insulated wires rated up to 1000°C.

High Temperature Wire is essential in environments where electrical systems are exposed to intense heat. Common applications include:

  • Industrial furnaces and commercial ovens
  • Kilns and heating equipment
  • Motor leads and generators
  • High-heat OEM (Original Equipment Manufacturer) environments
  • Aerospace and automotive systems, especially near engines and exhaust systems
  • Power generation and metal/glass processing machinery

Selecting the correct High Temperature Wire involves several key considerations:

  • Operating Temperature: Determine the maximum continuous temperature your wire will experience, and choose a wire rated above this for a safety margin.
  • Insulation Type: Match the insulation material (e.g., PTFE, silicone, fiberglass) to the specific heat, chemical, and mechanical stresses of your environment.
  • Voltage and Current Requirements: Ensure the wire's voltage and ampacity ratings are appropriate for your system's electrical load.
  • Environmental Factors: Consider exposure to moisture, chemicals, abrasion, or vibration, as these can impact material choice.
  • Certifications: Verify that the wire meets relevant industry standards like UL or CSA for safety and performance.

High Temperature Wire products are often subject to rigorous industry standards and certifications to ensure safety and performance. These commonly include:

  • UL (Underwriters Laboratories): Standards like UL 758 (Appliance Wiring Material) and UL 83A (Fluoropolymer Insulated Wire) are frequently applied.
  • CSA (Canadian Standards Association): Ensures compliance with Canadian safety standards.
  • NEMA (National Electrical Manufacturers Association): Provides standards for various electrical products, including those for high-temperature applications.

Our High Temperature Wire category includes a wide range of specialized types, each designed for distinct high-heat applications. These include:

  • Switchboard SIS: Often used in switchboards and control panels.
  • TGGT: Teflon, fiberglass, and fiberglass braid, commonly used in ovens and heating elements.
  • MG: Mica glass, designed for extreme temperatures up to 450-550°C.
  • SRG-K: Silicone rubber with a fiberglass braid.
  • UL 1330: A specific UL-rated high-temperature wire.
  • SRML: Silicone rubber motor lead wire, suitable for motors and lighting.

Yes, many High Temperature Wires are designed to perform well in environments beyond just extreme heat. Materials like Teflon PTFE offer excellent chemical resistance, while silicone rubber provides good resistance to moisture and humidity. It's crucial to select a wire with insulation and jacketing specifically rated for the combination of environmental challenges present in your application to ensure long-term reliability.

Yes, wire gauge is a critical factor in the performance of High Temperature Wire. The American Wire Gauge (AWG) rating indicates the conductor's size; a lower AWG number means a larger conductor. This directly impacts the wire's ampacity, or current-carrying capacity. Proper gauge selection is essential to prevent overheating, ensure safe current flow, and maintain the wire's integrity, especially in high-temperature applications where derating factors may apply.

Using standard wire in a high-temperature environment can lead to severe consequences. The insulation will quickly degrade, becoming brittle, cracking, or melting. This exposes the conductor, leading to potential short circuits, electrical faults, and increased fire risk. Overheating can also cause circuit breakers to trip, disrupt operations, and significantly reduce the lifespan of both the wire and connected equipment.

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High Temperature Wire

Looking for a reliable distributor that sells industrial high-temperature wire cut-to-length by the exact foot? Wire America is your #1 supplier of premium, extreme-heat wire and appliance lead cables, providing high-performance single-conductor wires processed to your precise footage specifications with zero master reel commitments.

Engineered to withstand severe thermal environments where standard thermoplastic insulation melts and fails, our comprehensive high-temp inventory is built to handle continuous operating temperatures ranging from 150°C up to 450°C (842°F). We offer a deep selection of specialized configurations, including Type MG 450°C mica glass lead wire for extreme-heat furnace applications, TGGT 250°C wire for heavy-duty industrial heating elements, and flexible SRML (Silicone Rubber Motor Lead) wire for high-temperature motor and apparatus leads.

Fully compliant with strict UL, CSA, and Appliance Wiring Material (AWM) standards, our bulk high-temperature wire is the trusted choice for internal equipment wiring in industrial ovens, commercial food service gear, blast furnaces, processing kilns, and drying equipment. By offering flexible, custom cut-to-length processing, we completely eliminate the burden of forced wholesale minimums so you get the exact footage your maintenance cycle or machine build demands.

Key Features
  • Extreme Thermal Resistance: Our selection includes wire rated for 150°C, 200°C, 250°C, and 450°C to meet the most demanding thermal environments.
  • Specialized Insulations: Features high-performance materials like Silicone Rubber, Teflon PTFE, and Mica Glass for maximum heat dissipation.
  • Rugged Protective Braids: Most high-heat cables are finished with a fiberglass braid to provide extra resistance to abrasion and mechanical damage.
  • Corrosion-Resistant Conductors: Utilizes tinned copper, nickel-plated copper, or nickel-coated copper to prevent oxidation at high temperatures.
  • Industrial Certifications: Manufactured to meet or exceed UL and CSA standards for hazardous and high-heat OEM environments.
Common Applications
  • Industrial Furnaces & Kilns: Type MG (Mica Glass) is the primary choice for extreme heat environments up to 450°C.
  • Commercial Ovens & Appliances: TGGT wire is frequently used in commercial cooking equipment and drying ovens rated for 250°C.
  • Motor Leads & Internal Wiring: SRML (Silicone Rubber Motor Lead) provides the flexibility and heat resistance needed for high-performance motors.
  • Switchboard & Control Panels: SIS wire is the standard for high-density wiring in power distribution boards where 125°C protection is required.
  • Heating Elements: Used as lead wire for strip heaters, band heaters, and other industrial heating components.
Installation Note
  • High-temperature wires like MG are optimized for dry, high-heat environments. For applications involving moisture or chemicals alongside high heat, ensure you select a cable like TGGT with a PTFE (Teflon) jacket to ensure long-term reliability.

Resources & Guides

Category_Buying Guide
What is SRML High Temp Wire?
November 25, 2025
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What is MG High Temp Wire?
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What is SIS Switchboard Wire (UL 3173) - 125°C?
January 12, 2026
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What is TGGT High Temp Wire?
December 02, 2025
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TGGT vs. MG: Which High-Temperature Wire Do You Need?
January 03, 2026
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Which High-Temp Wire Is Best? 125°C to 550°C Selection Guide
March 09, 2026
Read More about Which High-Temp Wire Is Best? 125°C to 550°C Selection Guide
What is Nickel-Plated Copper Wire? Going Beyond Tinned Copper
January 19, 2026
Read More about What is Nickel-Plated Copper Wire? Going Beyond Tinned Copper
What is PTFE Insulation? The 250°C High-Performance Shield
March 05, 2026
Read More about What is PTFE Insulation? The 250°C High-Performance Shield
What is Silicone Rubber Insulation?
January 05, 2026
Read More about What is Silicone Rubber Insulation?