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Solid THHN/THWN-2 WireFrom $0.20/ft -
Solid THHN/THWN-2 WireFrom $0.20/ft - Solid THHN/THWN-2 WireFrom $0.20/ft
- Solid THHN/THWN-2 WireFrom $0.20/ft
Parent SKU : TGGT-4
SKU : TGGT-4-250
"The industry standard for extreme heat environments—engineered with high-performance PTFE and glass shielding for maximum reliability in temperatures up to 250°C."
The 4 AWG TGGT wire is a heavy-duty conductor designed for environments where standard high-temp wires would degrade. It is the primary choice for main power feeds in industrial kilns, commercial convection ovens, and high-amperage heating systems. By combining 2% Nickel-Coated Copper with high-performance PTFE tapes and a double layer of glass braiding, TGGT provides the ultimate thermal and chemical stability for heavy industrial loads.
250°C Thermal Performance: Engineered to operate continuously in environments reaching 482°F, providing the necessary safety margin for industrial heating equipment.
Nickel-Coated Copper Conductor: Features 2% nickel plating per ASTM B355 to maintain high conductivity and prevent conductor embrittlement in extreme heat.
Triple-Layer Shielding: A combination of PTFE (Teflon) tape, glass yarn, and an outer fiberglass jacket impregnated with a heat-resistant finish.
Chemical & Oil Resistance: Virtually immune to most industrial solvents, oils, and chemicals, preventing insulation failure in harsh factory conditions.
ENGINEERING OVERVIEW: 4 AWG TGGT 600V
APPLICATION: Industrial heater leads, high-temp kilns, and large commercial oven power feeders.
VOLTAGE: 600 Volts.
UL LISTING: UL 5256.
CONDUCTORS: Flexible (133 strands) soft drawn 2% nickel-coated copper (per ASTM B355, B8, B173, and B174).
INSULATION: PTFE (Teflon) tape with a fiberglass moisture barrier.
JACKET: Braided fiberglass with a high-temperature finish.
TEMPERATURE: 250°C (482°F).
NOMINAL OD: 0.320 inches (8.13 mm)
Main Oven Power Leads: Connecting primary power to large-scale commercial conveyor and rack ovens.
Industrial Kiln Feeders: Reliable power distribution for ceramic, glass, and metal-treating kilns.
Heavy-Duty Heating Arrays: Wiring for large industrial infrared drying and curing systems.
Foundry Power Circuits: Used for power distribution in areas exposed to extreme radiant heat from molten metals.
Plastic Processing: Main power leads for heavy-duty extrusion barrels and large molding units.
Technical Note: All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyer’s responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.
| Wire Size (AWG/MCM) | 4 AWG |
| Conductor Material | Nickel Coated Copper |
| Conductor Type | Stranded |
| Strand Count | 133 |
| Outer Diameter (OD) (in/mm) | 0.320 in. / 8.13 mm |
| Jacket Type | Fiberglass Braid |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | Polytetrafluoroethylene (PTFE) |
| UL Listing Numbers | UL 5256, UL 5251 |
| Voltage Rating | 600V |
| Submersible | No |
| Flexibility Rating | Good |
| Temperature Rating | 250ºC |
| Standards | UL 5256 (18-2 AWG) UL 5251 (1/0 AWG and larger) CSA AWM 1 A/B FT1 VW-1 Flame Test |
| Miscellaneous Information | The data shown are approximate and subject to standard industry and manufacturer tolerances |
| Primary Applications | Heating Equipment, Cooking Equipment, Industrial Cooking, Equipment wiring in Iron and Steel Mills, Cement Kilns, and Glass Plants |
| Common Uses |
|
| Weight per Foot | 0.175 lb |
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
Parent SKU : TGGT-4
SKU : TGGT-4-250
Parent SKU : TGGT-4
SKU : TGGT-4-250
"The industry standard for extreme heat environments—engineered with high-performance PTFE and glass shielding for maximum reliability in temperatures up to 250°C."
The 4 AWG TGGT wire is a heavy-duty conductor designed for environments where standard high-temp wires would degrade. It is the primary choice for main power feeds in industrial kilns, commercial convection ovens, and high-amperage heating systems. By combining 2% Nickel-Coated Copper with high-performance PTFE tapes and a double layer of glass braiding, TGGT provides the ultimate thermal and chemical stability for heavy industrial loads.
250°C Thermal Performance: Engineered to operate continuously in environments reaching 482°F, providing the necessary safety margin for industrial heating equipment.
Nickel-Coated Copper Conductor: Features 2% nickel plating per ASTM B355 to maintain high conductivity and prevent conductor embrittlement in extreme heat.
Triple-Layer Shielding: A combination of PTFE (Teflon) tape, glass yarn, and an outer fiberglass jacket impregnated with a heat-resistant finish.
Chemical & Oil Resistance: Virtually immune to most industrial solvents, oils, and chemicals, preventing insulation failure in harsh factory conditions.
ENGINEERING OVERVIEW: 4 AWG TGGT 600V
APPLICATION: Industrial heater leads, high-temp kilns, and large commercial oven power feeders.
VOLTAGE: 600 Volts.
UL LISTING: UL 5256.
CONDUCTORS: Flexible (133 strands) soft drawn 2% nickel-coated copper (per ASTM B355, B8, B173, and B174).
INSULATION: PTFE (Teflon) tape with a fiberglass moisture barrier.
JACKET: Braided fiberglass with a high-temperature finish.
TEMPERATURE: 250°C (482°F).
NOMINAL OD: 0.320 inches (8.13 mm)
Main Oven Power Leads: Connecting primary power to large-scale commercial conveyor and rack ovens.
Industrial Kiln Feeders: Reliable power distribution for ceramic, glass, and metal-treating kilns.
Heavy-Duty Heating Arrays: Wiring for large industrial infrared drying and curing systems.
Foundry Power Circuits: Used for power distribution in areas exposed to extreme radiant heat from molten metals.
Plastic Processing: Main power leads for heavy-duty extrusion barrels and large molding units.
Technical Note: All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyer’s responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.
| Wire Size (AWG/MCM) | 4 AWG |
| Conductor Material | Nickel Coated Copper |
| Conductor Type | Stranded |
| Strand Count | 133 |
| Outer Diameter (OD) (in/mm) | 0.320 in. / 8.13 mm |
| Jacket Type | Fiberglass Braid |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | Polytetrafluoroethylene (PTFE) |
| UL Listing Numbers | UL 5256, UL 5251 |
| Voltage Rating | 600V |
| Submersible | No |
| Flexibility Rating | Good |
| Temperature Rating | 250ºC |
| Standards | UL 5256 (18-2 AWG) UL 5251 (1/0 AWG and larger) CSA AWM 1 A/B FT1 VW-1 Flame Test |
| Miscellaneous Information | The data shown are approximate and subject to standard industry and manufacturer tolerances |
| Primary Applications | Heating Equipment, Cooking Equipment, Industrial Cooking, Equipment wiring in Iron and Steel Mills, Cement Kilns, and Glass Plants |
| Common Uses |
|
| Weight per Foot | 0.175 lb |
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
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Physical Specifications
Technical Specifications
Usage & Installation:
Packaging & Dimensions:
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TGGT stands for Teflon, Glass, Glass, Teflon. It is a specialized high-temperature wire designed to handle continuous operating temperatures up to 250°C (482°F). The acronym describes its multi-layered construction: a flexible nickel-coated copper conductor wrapped in PTFE (Teflon) tape, bundled with fiberglass braids, and finished with a high-temperature Teflon jacket.
Yes, our TGGT wire is fully UL Style 5256 rated. UL 5256 is the official Underwriters Laboratories standard that certifies single-conductor appliance wiring material (AWM) for use up to 250°C and 600 volts. This rating guarantees that the wire has passed rigorous flame, thermal, and mechanical safety testing required for commercial and industrial heating applications.
At 250°C, standard tinned copper will oxidize and become brittle. The 2% Nickel coating ensures that the copper core maintains its electrical integrity and flexibility, which is critical for 4 AWG wires carrying heavy currents.
TGGT wire provides reliable performance in extreme heat environments up to 250°C (482°F), making it the industry standard for industrial-grade heating appliances and equipment.
No. While TGGT is the standard for appliances up to 250°C, if your application exceeds this (such as inside a high-temp kiln or blast furnace), you would need to move up to MG (Mica-Glass) wire, which is rated for 450°C.
The main difference is the temperature rating and insulation. TGGT (250°C) uses Teflon tape, while MG (450°C) uses Mica tape. MG wire is used for extreme industrial heat, while TGGT is the industry standard for commercial appliances and heating elements.
Because of the 250°C rating, 4 AWG TGGT has a much higher thermal threshold than standard 90°C wire, allowing it to handle higher current loads in high-heat environments. However, the exact ampacity depends on your specific installation, such as ambient temperature and how many conductors are in your conduit. Always refer to the NEC (National Electrical Code) tables for conductors rated at 250°C and apply the necessary de-rating factors to ensure your circuit is sized safely.
Yes. We carry a comprehensive range of high-temperature wire, including SIS, SRML, TGGT, & MG designed for everything from industrial motor leads to commercial oven circuitry. Each product page includes detailed engineering specs, such as strand counts, insulation materials, and UL listings. To view our complete inventory, sort by gauge, or download full spec sheets for every size we carry, please visit our Full High-Temperature Wire Collection here.
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