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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 : NMB2-3
SKU : NMB2-3-250
Specifically engineered for high-wattage residential electrical systems, this 2 AWG NM-B Copper Building Wire provides a robust solution for interior branch circuits. Featuring two high-conductivity copper conductors and a dedicated grounding wire, this assembly is enclosed in a durable, non-metallic (NM-B) heat-resistant PVC jacket, designed to handle heavy-duty household loads with maximum reliability.
When powering high-demand appliances, conductor integrity and ease of installation are non-negotiable. This 2-conductor (with ground) cable is designed for dry-location interior wiring, offering the superior conductivity of copper in a format that is easy to pull through wooden studs and floor joists without the need for protective conduit in most residential applications.
Superior Copper Conductivity: Annealed (soft) copper conductors provide the highest electrical efficiency and lowest resistance for long-term power stability.
Streamlined Residential Installation: The smooth, sunlight-resistant PVC jacket reduces friction during pulls through bored holes and along framing members.
Simplified Grounding: Includes a dedicated bare copper ground wire to ensure system safety and code compliance for heavy branch circuits.
High-Grade Insulation: Conductors are insulated with heat-resistant PVC and topped with a clear nylon jacket (THHN/THWN-2) for enhanced durability.
Conductor Size: 2 AWG
Number of Conductors: 2 (plus Ground)
Color Code: Black, White, Bare Ground
Ampacity: 95 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
Residential Sub-Panels: The primary choice for feeding secondary distribution panels in large homes, garages, or workshops.
High-Power Kitchen Appliances: Ideal for dedicated circuits supplying electric ranges, ovens, and high-wattage cooktops.
HVAC Systems: Frequently utilized for powering central air conditioning units and large heat pumps.
Electric Vehicle (EV) Chargers: A robust solution for Level 2 EV charging station installations requiring high-amperage dedicated circuits.
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.
*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) | 2 AWG |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 7 |
| Outer Diameter (OD) (in/mm) | 0.852 in. |
| Jacket Type | PVC |
| Conductor Count | 3 |
| Shield | Unshielded |
| Insulation Type | (PVC) Polyvinyl Chloride |
| UL Listing Numbers | UL 83 |
| Voltage Rating | 600V |
| Ampacity Rating | 95 |
| 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 | 0.808 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 2 AWG, 3-conductor Non-Metallic Sheathed Cable (commonly referred to by the brand name "Romex") is a heavy-duty residential building wire. It is primarily used for high-draw appliances and sub-panel feeds in dry locations. Common applications include wiring for electric furnaces, large heat pumps, and 90A-100A sub-panels in residential dwellings. Because it is NM-B, it is rated specifically for indoor use in protected environments like wall studs or floor joists.
At the 2 AWG size, copper provides superior conductivity and a smaller physical footprint than aluminum equivalents.
According to NEC Article 334.80, NM-B cable must be sized based on the 60°C temperature column in Table 310.16, regardless of the 90°C rating of the internal insulation.
⚠️ PRO TIP: Even though the internal wires are 90°C rated, you cannot use a 115A or 125A breaker for this cable. In most residential applications, 2/3 NM-B is protected by a 90 Amp circuit breaker.
This cable follows standard residential color-coding for 240V/120V systems:
While smaller NM-B gauges are color-coded by jacket (Yellow for 12, Orange for 10), heavy-gauge NM-B like 2 AWG typically features a Black outer jacket. The jacket is made of high-grade PVC that is flame-retardant and moisture-resistant (though not waterproof).
NM-B is highly versatile but has strict code-defined limits to ensure safety:
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