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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 : 14SIS-3320
SKU : 14SIS-3320-250-BK
This 14 AWG UL 3320 hook-up wire is a versatile industrial lead wire engineered for applications that require a balance of compact routing and high environmental resistance. Utilizing chemically cross-linked polyethylene (XLPE) insulation, this wire provides a rugged, heat-stable jacket that maintains its electrical properties under consistent thermal stress.
UL 3320 is a specialized standard frequently utilized for lead wire in electrical equipment where standard PVC insulation would fail due to heat or chemical exposure. The 14-gauge conductor is a "workhorse" size, offering significant current-carrying capacity for control circuits and power leads in a smaller diameter than 10 or 12 AWG options. The XLPE insulation is a thermoset material, meaning it will not melt or deform when exposed to soldering temperatures or high-ambient heat.
Premium XLPE Insulation: The cross-linked polyethylene jacket offers superior dielectric strength and exceptional resistance to environmental stress cracking and moisture.
90C Thermal Rating: Designed for continuous, reliable operation in environments reaching up to 90C (194F).
Tinned Copper Conductor: Features annealed tinned copper strands that provide high electrical conductivity and maximum protection against corrosion and oxidation at terminal connections.
Mechanical Resilience: Highly resistant to abrasion, cut-through, and crushing, ensuring long-term reliability in high-vibration industrial enclosures.
Chemical & Oil Resistance: The insulation remains stable when exposed to common industrial oils, acids, alkalis, and solvents.
Standard Compliance: Fully meets the requirements for UL Style 3320 and is rated for 600V service.
Conductor Size: 14 AWG
Stranding: 41/30 (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: 0.165 inches (4.19 mm)
Approvals: UL 3320
Motor Leads: Used for internal connections in smaller electric motors and generators where vibration and heat are factors.
Transformer Wiring: Ideal for lead-outs and internal coils in dry-type transformers.
Industrial Control Panels: Preferred for power distribution and control wiring in cabinets where high-reliability insulation is mandatory.
Appliance and HVAC: Suitable for the internal wiring of commercial heating and cooling equipment exposed to consistent thermal cycling.
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) | 14 AWG |
| Conductor Material | Tinned Copper |
| Conductor Type | Stranded |
| Strand Count | 41 |
| Outer Diameter (OD) (in/mm) | 0.130 in. / 3.30 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 | 0.016 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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At the 14-gauge level, wire is often routed through tight channels where it is subject to vibration and pressure. XLPE is engineered to handle these stresses:
Yes! Because 14 AWG handles significant current and the XLPE insulation is so tough, it’s a popular choice for automotive and marine power runs. It provides a much higher level of safety against "shorts" compared to budget wires with thin, soft insulation that might vibrate through over time.
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 a regular occurrence.
In the world of wiring, 14 AWG is a "workhorse" size. It’s the same thickness used for the standard 15-amp outlets in your home. In an industrial machine, 14 AWG is usually the primary choice for carrying power to mid-sized motors, heaters, and internal power supplies.
While 14 AWG is a sturdy gauge, the quality of the copper core determines the longevity of the electrical system:
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.
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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