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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 : NMB10-2
SKU : NMB10-2-250
The definitive choice for dedicated 30-amp residential circuits, this 10 AWG NM-B Copper Building Wire offers a high-performance power path for essential home equipment. Featuring two insulated copper conductors and a dedicated bare ground, this assembly is encased in a high-visibility orange jacket, specifically designed to ensure the 30-amp rating is immediately recognizable to both installers and electrical inspectors.
This 2-conductor (with ground) cable is engineered for maximum reliability in dry-location interior wiring. The Type NM-B construction allows for efficient deployment through wooden framing members without the need for protective conduit, making it a cost-effective and labor-saving solution for modern residential construction and major remodeling projects.
High-Visibility Circuit ID: The orange PVC outer jacket serves as a permanent visual cue, identifying the cable as 10 AWG to prevent installation errors and simplify future electrical maintenance.
Pure Annealed Copper: Soft-drawn copper conductors provide superior electrical efficiency and minimal voltage drop for sustained high-wattage household loads.
Reduced-Friction Jacket: The outer shell is formulated with a slick finish to glide easily through bored studs and floor joists, preventing snagging and jacket damage.
Advanced THHN Insulation: Individual conductors are protected with heat-resistant PVC and a tough nylon topcoat, offering an extra layer of protection against abrasion during the rough-in.
Conductor Size: 10 AWG
Number of Conductors: 2 (plus Ground)
Color Code: Black, White, Bare Ground
Jacket Color: Orange
Ampacity: 30 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
Electric Water Heaters: The standard wiring solution for dedicated 240V circuits supplying residential water heating units.
A/C Condenser Units: Ideal for powering window air conditioners and small central A/C condensers requiring a 30A circuit.
240V Workshop Outlets: Frequently used for heavy-duty power tools, medium-sized compressors, and dust collection systems.
Dedicated High-Load Appliances: A reliable choice for built-in microwaves and high-amperage countertop appliances where a separate neutral is not required.
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) | 10 AWG |
| Conductor Material | Copper |
| Conductor Type | Solid |
| Strand Count | 1 |
| Outer Diameter (OD) (in/mm) | .225 x .490 in. |
| Jacket Type | PVC |
| Conductor Count | 2 |
| Shield | Unshielded |
| Insulation Type | (PVC) Polyvinyl Chloride |
| UL Listing Numbers | UL 83 |
| Voltage Rating | 600V |
| Ampacity Rating | 30 |
| 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 | 0.121 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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This 10 AWG, 2-conductor cable is designed for dedicated 240V residential circuits that do not require a neutral wire, or high-draw 120V circuits. It is most commonly used for electric water heaters, baseboard heaters, and dedicated shop tools like table saws or air compressors. By providing 10-gauge copper, it ensures the circuit can safely handle a continuous 30-amp load, which is 50% more capacity than standard 12 AWG kitchen or bath wiring.
The industry-standard Orange Jacket is a critical safety feature for 10 AWG NM-B cable. This color-coding allows electrical inspectors and homeowners to instantly verify that the wire gauge matches the circuit breaker. Because 10 AWG is significantly thicker than 12 AWG (yellow) or 14 AWG (white), the orange jacket serves as a visual "stop sign" to prevent installers from accidentally over-fusing a circuit, ensuring that a 30-amp breaker is paired with the correct 30-amp-rated wire.
When used for a 240V appliance like a water heater, 10/2 NM-B typically contains a Black wire, a White wire, and a Bare ground. Since there is no neutral in a 240V-only circuit, the White wire must be re-identified. Per the NEC, you must wrap black or red electrical tape around the white insulation at both the breaker panel and the appliance junction box. This alerts future technicians that the wire is "hot" and carries 120V to ground, preventing dangerous mistakes during troubleshooting or repairs.
Even though the internal copper conductors are insulated with 90°C-rated material, NEC Article 334.80 requires NM-B to be sized using the 60°C column. For 10 AWG copper, this fixes the maximum allowable ampacity at 30 Amps. This limitation exists because NM-B is often buried in fiberglass insulation or bundled with other cables, which traps heat. Staying at the 30-amp limit ensures the cable operates at a safe temperature throughout its lifespan, even under a heavy continuous load.
10 AWG solid copper is much stiffer than standard household wire and requires specific handling to ensure a long-lasting connection. To prevent damage to the conductors or the PVC jacket, the minimum bending radius must be at least 5 times the cable's diameter. Furthermore, because 10-gauge wire is heavier, it must be supported by approved staples or straps within 12 inches of every electrical box and every 4.5 feet along the run to prevent the weight of the wire from pulling on the terminal connections.
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