TGGT - 250°C

TGGT Wire is a high-temperature electrical wire built with a unique Teflon (PTFE) / Glass / Glass / Teflon (PTFE) insulation structure, designed for extreme heat applications. It features stranded nickel-plated copper conductors, an inner PTFE layer for high-temperature and chemical resistance, followed by multiple fiberglass yarn layers for thermal insulation and mechanical strength, and an outer treated fiberglass braid for abrasion protection. Rated for 600 volts and a continuous temperature of 250°C (482°F), TGGT wire is highly resistant to heat, abrasion, chemicals, and moisture. It is widely used for internal wiring in industrial and household ovens, furnaces, kilns, and other high-temperature processing equipment. Read our TGGT High Temp Wire Buyers Guide.

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Industrial TGGT High-Temp Wire Technical Overview

Looking for a reliable US supplier that sells TGGT high-temp lead wire by the foot? Wire America is the #1 supplier for industrial-grade Type TGGT 250°C High Temperature Wire.  We provide heavy duty, extreme-heat single conductor lead wires cut to your exact length with fast shipping to keep your projects moving on time.  No master reels required, no wasted scrap material—just the exact footage your job requires.

TGGT wire is the "workhorse" of the high-heat electrical industry, offering a perfect balance of flexibility, moisture resistance, and extreme thermal stability. Rated for 250°C (482°F), it is specifically designed to outperform standard silicone wires in environments where chemicals, steam, or mechanical abrasion are present.  This high-temp wire carries a UL listing of UL 5256 & UL 5251.



Key Features
  • Triple-Layer Thermal Barrier: The unique "Teflon-Glass-Glass-Teflon" construction provides multiple layers of defense against heat soak and electrical leakage.
  • Superior Chemical & Moisture Resistance: The internal PTFE (Teflon) tape wrap acts as a longitudinal moisture barrier, protecting the conductors from oils, acids, and humidity.
  • Flexible Nickel-Plated Copper: Features stranded nickel-plated copper conductors that remain highly conductive and resist becoming brittle at a constant 250°C.
  • High-Strength Fiberglass Jacket: The outer treated fiberglass braid is engineered to resist fraying during difficult pulls through industrial conduits.
  • 600V Power Rating: Suitable for both low-voltage control signals and high-voltage power leads in heavy machinery.
Common Applications
  • Commercial Kitchen Equipment: The standard choice for internal wiring in commercial fryers, ovens, and steam tables.
  • Plastic Extrusion & Injection Molding: Provides reliable power to heating bands and barrels in plastic manufacturing.
  • Industrial Drying & Curing: Used in specialized paint booths and curing ovens that require constant high-heat operation.
  • Heater Lead Wire: The preferred lead wire for cartridge heaters, strip heaters, and band heaters.
  • Aerospace & Heat Treating: Deployed in environments requiring lightweight yet ultra-durable high-heat cabling.
Installation Note
  • TGGT is optimized for environments up to 250°C. For extreme-heat applications exceeding this limit, such as blast furnaces or ceramic kilns, you must upgrade to Type MG (Mica Glass) wire, which is rated for 450°C. If your application requires high flexibility at lower temperatures (up to 200°C), SRML is a cost-effective alternative.