10/3 NM-B Copper Building Wire with Ground, 600V (Orange Jacket)

The industry standard for 30-amp residential circuits, this 10 AWG NM-B Copper Building Wire is purpose-built for mid-range power distribution in modern homes. Engineered with two insulated copper conductors and a dedicated bare ground, this cable is instantly identifiable by its high-visibility orange jacket, ensuring quick circuit identification for both installers and inspectors.

Why Choose 10/3 NM-B Copper Building Wire?

This 2-conductor (plus ground) configuration is a fundamental component of residential wiring, offering the perfect balance between high ampacity and manageable flexibility. The Type NM-B designation allows for rapid deployment through interior wood-frame structures without the need for conduit, significantly reducing labor time on the job site.

• High-Visibility Color Coding: The orange PVC jacket serves as a permanent visual indicator that the circuit is 10 AWG, helping to prevent wiring errors and ensuring code compliance at a glance.

• Superior Copper Integrity: Annealed (soft) copper conductors provide the reliable electrical performance and low resistance necessary for sustained high-wattage loads.

• Friction-Reducing Jacket: The outer PVC sheath is designed with a slick finish to glide through bored holes in studs and joists without snagging or tearing.

• Dual-Layer Protection: Conductors are shielded with heat-resistant PVC and topped with a clear nylon jacket (THHN/THWN-2) for enhanced abrasion resistance during the pull.

Technical Specifications: 10/3 NM-B Copper

• 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

Common Applications

• Electric Water Heaters: The standard wiring choice for dedicated 30A residential water heating circuits.

• Clothes Dryers: Ideal for supplying power to 120/240V electric dryer units in laundry rooms.

• Air Conditioning Units: Frequently utilized for window units and small central A/C condensers that require a 30A feed.

• High-Power Kitchen Circuits: A reliable solution for dedicated circuits serving built-in microwaves or high-amperage countertop appliances.

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.

General Shipping Information

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 Shipping

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).

Returns

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.