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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 : NMB12-2
SKU : NMB12-2-250
The versatile mainstay of modern residential electrical systems, this 12 AWG NM-B Copper Building Wire is specifically engineered for 20-amp branch circuits. Featuring two high-conductivity copper conductors and a dedicated bare grounding wire, this cable is easily identified by its signature high-visibility yellow jacket, ensuring quick identification for installers and inspectors alike.
This 2-conductor (with ground) configuration is a fundamental requirement for the increased power demands of contemporary homes. Designed for interior dry-location wiring, the Type NM-B construction allows for rapid routing through wooden framing without the need for conduit, significantly reducing labor time and material costs compared to traditional piping methods.
Color-Coded Circuit Identification: The bright yellow PVC jacket provides an immediate visual signal that the circuit is rated for 20 amps, helping to prevent cross-wiring with 15-amp (white) or 30-amp (orange) circuits.
Superior Copper Conductivity: Annealed (soft) copper conductors provide the reliable electrical performance and low resistance necessary for consistent power delivery to sensitive electronics and kitchen appliances.
Low-Friction Pulling Jacket: The outer PVC sheath is formulated with a slick finish, allowing the cable to glide through bored studs and floor joists with minimal effort.
Reliable Dual-Layer Insulation: Each conductor is shielded with heat-resistant PVC and topped with a tough nylon jacket (THHN/THWN-2), providing enhanced protection against abrasions during the rough-in stage.
Conductor Size: 12 AWG
Number of Conductors: 2 (plus Ground)
Color Code: Black, White, Bare Ground
Jacket Color: Yellow
Ampacity: 20 Amps at 60°C (NEC Table 310.16)
Voltage: 600V
Insulation: Polyvinyl Chloride (PVC) with Nylon Covering (Type THHN)
Max Temp: 90°C (Dry locations only)
Conductor Material: Annealed (Soft) Copper
Standards: UL Standard 83, UL Standard 719, ASTM B-3, B-8, Federal Spec A-A-59544
Kitchen Branch Circuits: The standard choice for GFCI-protected outlets serving countertops and heavy kitchen appliances.
Dedicated Laundry Room Circuits: Frequently utilized for washing machines and shared laundry area outlets.
Home Office & Entertainment Centers: Ideal for powering computer workstations and home theater systems that require a stable, 20-amp dedicated feed.
Bathroom GFCI Circuits: The industry standard for wiring bathroom receptacles to handle high-wattage hair dryers and personal grooming tools.
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. NM-B is for dry, indoor use only.
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*All values are nominal and subject to correction. Ampacity is based on the National Electrical Code (NEC) 60°C column for NM-B cable, regardless of the conductor temperature rating.
| Wire Size (AWG/MCM) | 12 AWG |
| Conductor Material | Copper |
| Conductor Type | Solid |
| Strand Count | 1 |
| Outer Diameter (OD) (in/mm) | .200 x .400 in. |
| Jacket Type | PVC |
| Conductor Count | 2 |
| Shield | Unshielded |
| Insulation Type | (PVC) Polyvinyl Chloride |
| UL Listing Numbers | UL 83 |
| Voltage Rating | 600V |
| Ampacity Rating | 20 |
| Submersible | No |
| Temperature Rating | 90ºC |
| Standards | US 719 UL 83 ASTM B3 and B8 |
| Miscellaneous Information | All values are nominal and subject to correction. |
| RoHS Compliance | Yes |
| Primary Applications | Wiring outlets, switches, and lighting circuits in residential buildings. |
| Weight per Foot | 0.079 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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This 12 AWG, 2-conductor cable is the heavy-duty workhorse of modern residential electrical systems. It is the specific requirement for 20-amp branch circuits, providing significantly more power capacity than standard 14-gauge lighting wire. It is most commonly used for "small appliance" circuits in kitchens, bathrooms, and dining rooms, as well as for dedicated outlets for laundry rooms and garage workshops. By using 12-gauge copper, it ensures that high-draw appliances like hair dryers, toasters, and power tools can operate without tripping breakers or overheating the wire.
The industry-standard Yellow Jacket is a vital safety and identification feature. Introduced to help standardize residential wiring, the color-coding allows for instant recognition of the wire gauge:
The "2-conductor" designation refers to the two insulated wires (Black and White), plus a bare copper ground.
Per NEC Article 334.80, all NM-B cables must be rated using the 60°C temperature column of the ampacity table. For 12 AWG copper, this fixes the maximum allowable limit at 20 Amps. While the internal conductors feature 90°C rated insulation, the assembly is capped at the lower temperature rating to account for the heat-retention properties of residential wall cavities and thermal insulation. This ensures the outer PVC jacket does not become brittle or degraded over decades of use.
12 AWG copper is stiffer than 14 AWG and requires proper technique to ensure a professional, code-compliant installation:
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