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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 : 6SIS-3320
SKU : 6SIS-3320-250-GY
This 6 AWG UL 3320 hook-up wire is a heavy-duty industrial lead wire engineered for high-current applications that require a balance of thermal stability and mechanical ruggedness. Featuring chemically cross-linked polyethylene (XLPE) insulation, this wire provides a durable, heat-stable jacket that maintains electrical integrity under significant environmental stress.
UL 3320 is a specialized standard frequently used for internal wiring in large-scale electrical equipment, including motor leads and power supplies. The 6-gauge conductor provides high ampacity for power distribution, while the "thermoset" XLPE insulation offers a distinct advantage over standard PVC—it will not melt, flow, or deform when exposed to extreme heat or momentary overloads.
High-Performance XLPE Insulation: The cross-linked polyethylene jacket offers superior dielectric strength and exceptional resistance to environmental stress cracking.
90C Temperature Rating: Specifically rated for continuous operation in environments reaching up to 90C (194F).
Tinned Copper Conductor: Features annealed tinned copper strands for maximum conductivity and elite protection against oxidation and corrosion at termination points.
Mechanical Durability: Highly resistant to abrasion, cut-through, and crushing, making it ideal for the high-vibration environments found in heavy machinery.
Chemical & Oil Resistance: The XLPE insulation remains stable when exposed to common industrial oils, acids, alkalis, and solvents.
Regulatory Compliance: Fully meets the standards for UL Style 3320 and is designed for 600V service.
Conductor Size: 6 AWG
Stranding: 133/27 (High Flexibility)
Voltage Rating: 600V
Temperature Rating: 90C (194F)
Insulation Material: Cross-linked Polyethylene (XLPE)
Insulation Thickness: 0.060 inches (1.52 mm)
Nominal Outer Diameter: 0.320 inches (8.13 mm)
Approvals: UL 3320
Motor Leads: Used as internal lead wire for heavy-duty electric motors and generators.
Switchgear & Control Panels: Ideal for power routing in industrial cabinets where high current and reliability are mandatory.
Transformers: Preferred for internal connections and lead-outs in large dry-type transformers.
Battery & Power Supplies: Suitable for high-amperage connections in industrial power systems and battery banks.
Technical Note: All dimensions and stranding counts are nominal. UL 3320 is intended for the internal wiring of equipment and is not approved for use as a portable cord or for structural building wiring.
SPECIFICATION: UL Style 3320
| Wire Size (AWG/MCM) | 6 AWG |
| Conductor Material | Tinned Copper |
| Conductor Type | Stranded |
| Strand Count | 133 |
| Outer Diameter (OD) (in/mm) | 0.300 in. / 7.62 mm |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | XLPE |
| UL Listing Numbers | UL 3320, UL 44, UL 758 |
| Voltage Rating | 600V |
| Submersible | No |
| Temperature Rating | 90ºC |
| Standards | UL 44 VW-1 Flame Test, UL 758 Style 3320 NEC Type SIS NEMA SG 5 |
| Miscellaneous Information | All values are nominal and subject to correction. |
| Primary Applications | Switchboards, Control and Power Circuits, Applications up to 90° and 600 volts. |
| Common Uses |
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| Weight per Foot | 0.092 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
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UL 3320 is engineered for high-reliability internal wiring in appliances and motor leads. Its 90°C thermal rating and durable XLPE insulation make it a preferred choice for control panels, transformers, and switchboard applications where long-term thermal stability is critical.
If you look at the wire, the copper core is roughly the thickness of a standard pencil. It is a "heavy hitter" in the electrical world. While smaller wires are for signals or lightbulbs, 6 AWG is used to carry the main power for large machinery, industrial heaters, or the main power feed for a large control panel.
Jumper cables use soft, rubbery PVC so they can be thrown in a trunk. This wire uses XLPE, which is chemically "cooked" to be much tougher. Think of it like the difference between a raw rubber band and a rugged plastic zip-tie; the XLPE is designed to be a permanent, heavy-duty shield that won't get crushed or cut easily inside a massive machine.
It is still high-quality copper, but it has been "Tinned." In large machines, heat and air can make copper "rust" (oxidize) and turn black. The silver-colored tin acts like a protective suit of armor, keeping the copper fresh so your high-power electrical connections stay strong for decades.
Yes, 6 AWG UL 3320 is often used for the main "artery" in power systems, such as connecting large battery banks or high-output power supplies. Because the insulation is so tough, it provides a higher level of safety against "shorts" compared to standard automotive wire.
90°C (194°F) is just below the temperature of boiling water. While some wires are rated for higher heat, 90°C is the "sweet spot" for most industrial power distribution. It allows the wire to carry a lot of current safely without the insulation degrading, which is perfect for continuous, 24/7 operation in a factory setting.
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