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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 : 10SIS-3320
SKU : 10SIS-3320-250-BK
This 10 AWG UL 3173 hook-up wire is a high-performance internal wiring solution built for reliability in demanding thermal and mechanical environments. By utilizing chemically cross-linked polyethylene (XLPE) insulation, this wire provides a rugged, "thermoset" jacket that maintains its integrity under high heat, resisting the melting and flowing common with standard thermoplastic wires.
While the 8 AWG version is designed for higher amperage, the 10 AWG UL 3320 is the ideal choice for applications that require significant power delivery in a more compact profile. It retains the same rugged XLPE insulation system, which is "thermoset"—meaning it won't soften or deform under heat or when being soldered. This wire is specifically engineered for the internal wiring of appliances, motors, and transformers where environmental resistance is a priority.
Premium XLPE Insulation: The cross-linked polyethylene jacket offers superior dielectric strength and will not melt or shrink back, even during momentary overloads or high-heat exposure.
90C Thermal Rating: Designed for continuous, stable operation in environments reaching up to 90C (194F).
Tinned Copper Conductor: Annealed tinned copper strands provide high electrical conductivity and excellent resistance to corrosion and oxidation.
Mechanical Integrity: The insulation is highly resistant to abrasion, cut-through, and crushing, ensuring a long service life in high-vibration industrial cabinets.
Chemical & Oil Resistance: Resists common industrial solvents, lubricants, and chemicals, making it suitable for harsh factory floor environments.
Regulatory Compliance: Fully meets the requirements for UL Style 3320 and is rated for 600V service.
Conductor Size: 10 AWG
Stranding: 105/30 (High Flexibility)
Voltage Rating: 600V
Temperature Rating: 90C (194F)
Insulation Material: Cross-linked Polyethylene (XLPE)
Insulation Thickness: 0.045 inches (1.14 mm)
Nominal Outer Diameter: 0.212 inches (5.38 mm)
Approvals: UL 3320
Motor and Generator Leads: Used for internal connections where thermal stability and vibration resistance are mandatory.
Industrial Control Panels: Ideal for power routing in cabinets requiring a smaller footprint than 8 AWG while still maintaining high current capacity.
Transformers: Preferred for internal lead-outs in dry-type transformers.
Appliances and HVAC: Suitable for the internal wiring of commercial heating and cooling equipment.
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) | 10 AWG |
| Conductor Material | Tinned Copper |
| Conductor Type | Stranded |
| Strand Count | 105 |
| Outer Diameter (OD) (in/mm) | 0.170 in. / 4.32 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 | 0.034 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:
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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.
This 10 AWG hook-up wire is a high-capacity industrial conductor designed for the internal wiring of appliances, motors, and power supplies. The standout feature of UL 3320 is its XLPE (Cross-Linked Polyethylene) insulation combined with a heavy-duty 10-gauge core. This makes it the specific choice for applications requiring up to 30-40 Amps of continuous current where mechanical toughness and resistance to "insulation creep" are required.
In the world of wiring, the lower the number, the thicker the wire. 10 AWG is a "heavy-hitter." It’s the same size used for the most powerful individual circuits in a home, like a water heater or a clothes dryer. In a factory setting, it’s used to carry the main power to large motors or heavy industrial heaters.
It is still high-quality copper, but it has been "Tinned." Think of it like galvanized steel; the silver tin coating acts as a shield that prevents the copper from "rusting" (oxidizing) and turning black over time. This is especially important in machines that get hot, as heat usually makes copper corrode much faster.
This wire uses XLPE, which is like the "heavy-duty" version of plastic. While standard wire insulation (like on a lamp cord) is soft and can be easily nicked with a fingernail, XLPE is chemically toughened. It’s designed to be pulled through metal holes and clamped down into heavy machinery without the insulation getting crushed or flattened out.
Yes! Because 10 AWG handles significant current and the XLPE insulation is so tough, it’s a popular choice for solar battery banks and automotive power runs. It provides a much higher level of safety against "shorts" compared to budget wires with thin, soft insulation.
90°C (194°F) is nearly the temperature of boiling water. This rating means the wire can sit safely in the "hot zone" of an engine or a large power supply without the insulation becoming brittle or melting. It’s designed for 24/7 industrial use where heat buildup is expected.
While both utilize XLPE insulation and are rated for 600V, the main difference is the temperature rating. UL 3320 is rated for 90°C, whereas UL 3173 is typically rated for 125°C. Use UL 3320 for cost-effective performance in standard temperature environments, and step up to UL 3173 only if your application exceeds 90°C.
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