From $0.20/ft
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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 : THN14CST
SKU : THN14CST-250-BK
"The essential standard for 15-amp residential lighting and commercial control circuits—engineered with dual-rated THHN/THWN-2 insulation and a friction-reducing nylon jacket for maximum reliability in 600V applications."
The #14 AWG copper building wire is the primary choice for standard lighting circuits and general-purpose 15-amp outlets. Because it is the thinnest standard building wire, using our stranded version is a massive advantage—it is incredibly easy to pull through complex conduit runs and weave through crowded junction boxes.
Dual Rated (THHN/THWN-2): Engineered for dry locations up to 90°C (THHN) and wet locations (THWN-2), providing maximum versatility for indoor and outdoor conduits.
Tough PVC/Nylon Jacket: The high-heat and moisture-resistant PVC insulation is protected by a tough, friction-reducing Nylon outer sheath, making for easier pulls through tight bends.
High-Conductivity Copper: Manufactured with soft-annealed stranded copper to provide maximum flexibility and superior electrical conductivity for branch circuits and feeders.
Oil & Gasoline Resistant: The specialized jacket is designed to resist chemical degradation, making it ideal for industrial environments and service station wiring.
Residential Lighting: The standard conductor for 15-amp lighting circuits, ceiling fans, and smoke detector interconnects.
Commercial Control Wiring: Ideal for HVAC controls, signaling circuits, and remote-control overhead door operators.
General Purpose Outlets: Used for standard 15-amp receptacles in bedrooms and living areas.
Conduit Pulls: Specifically engineered to be pulled through EMT, PVC, or flexible conduit in both indoor and outdoor environments.
ENGINEERING OVERVIEW: 14 AWG STR THHN 600V
APPLICATION: General purpose wiring for lighting circuits, smoke detectors, and control wiring in residential and commercial projects.
VOLTAGE: Rated for 600 Volts.
CONDUCTORS: Stranded soft-annealed copper.
INSULATION: Heat and moisture-resistant PVC (Polyvinyl Chloride).
JACKET: Clear nylon (polyamide)
TEMPERATURE: 90°C Dry (THHN), 90°C Wet (THWN-2).
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) | 14 AWG |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 19 |
| Outer Diameter (OD) (in/mm) | 0.120 in. / 3.048 mm |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | (THHN) Thermoplastic High Heat-Resistant Nylon-coated |
| UL Listing Numbers | UL 83, UL 1063, UL 758 |
| Voltage Rating | 600V |
| Ampacity Rating | 15 |
| Submersible | No |
| Standards | UL 83 UL VW-1 Size 1/0 & larger suitable for cable tray use MTW per UL 1063 ASTM B1, B3, B8 Federal Spec A-A-59546 |
| Miscellaneous Information | All values are nominal and subject to correction. *90°C Wet/Dry Per NEC Table 310.15 (B)(16) for not more than three conductors in raceway based on 30°C ambient temperature. |
| Primary Applications | General-purpose electrical wiring in commercial, industrial, and residential structures. It's widely used to supply power to outlets, switches, lighting fixtures, and other electrical loads throughout a building |
| 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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14 AWG THHN copper wire is rated for 25 Amps at 90°C. However, under the NEC "Small Conductor" rules, the overcurrent protection (breaker size) for #14 copper is limited to 15 Amps. This makes it the standard for residential room lighting and general living area circuits.
A 1/2-inch conduit can safely hold up to twelve 14 AWG THHN conductors. This allows for a high density of circuits in a single run. For complex control wiring or large lighting banks, upgrading to a 3/4-inch conduit is often preferred to reduce the physical effort of the pull and manage heat dissipation.
Note on Conduit Sizing: These recommendations are based on standard NEC 40% fill guidelines for general informational purposes. Always consult with a licensed electrician or project engineer to verify final conduit specifications and gauge size.
It is a technical acronym describing the wire's physical properties: T (Thermoplastic insulation), HH (High-Heat resistant), N (Nylon-coated), and W (Wet-rated). The "-2" is the most important part for modern builders—it means the wire maintains its full 90°C heat resistance even in wet or oily locations, whereas standard THWN drops to 75°C.
It depends on the installation. Stranded #14 is the professional favorite for conduit because it is much more flexible and easier to pull around bends. Solid #14 is often used in residential "stab-in" device terminations. Both carry the same electrical rating, but stranded wire significantly reduces physical fatigue during a long pull.
No, 14 AWG THHN/THWN-2 wire is not rated for direct burial. While the "W" in the rating signifies it is moisture-resistant and safe to use in underground conduits, the nylon jacket is not engineered to withstand direct contact with soil, rocks, or acidic ground conditions. For applications where the wire will be buried directly in the earth without a protective conduit, you must use a specialized cable such as Type UF-B (Underground Feeder) or Type USE-2.
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