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 : BCSTR3/0-19
SKU : BCSTR3/0-19-250
"Designed for high-capacity grounding, bonding, and primary power distribution, this 3/0 AWG Stranded Bare Copper wire is engineered for elite electrical performance. Featuring a premium 19-strand concentric-lay construction and soft-drawn (annealed) composition, it delivers an optimal blend of field flexibility and physical mass, making it an ideal choice for utility substations, industrial facilities, and heavy commercial infrastructure."
This conductor is an excellent option for utility substation grounding grids, high-amp commercial service entrances, industrial facilities, and heavy-duty lightning protection networks. Moving up to the 3/0 gauge provides a massive cross-sectional area over smaller conductors, ensuring a safer, ultra-low-impedance path to ground to dissipate severe fault currents or lightning strikes. Its heavy 19-strand concentric-lay construction maximizes physical toughness for rugged environments, while the high-purity copper guarantees a permanent, maintenance-free structural lifespan.
High-Capacity Conductivity: 99.9% pure, uninsulated copper provides an ultra-low-impedance path to clear high-magnitude fault currents and lightning surges safely.
Premium 19-Strand Flexibility: Interweaving 19 individual strands creates a remarkably pliable conductor that easily conforms to structural contours, grounding loops, and tight radius bends.
Soft-Drawn (Annealed): The thermal annealing process softens the copper’s crystalline matrix, eliminating mechanical memory and making the cable highly workable for field technicians.
Direct Burial Resilience: Uninsulated bare copper natively fights off moisture, oxidation, and aggressive soil chemistries, ensuring permanent, maintenance-free placement directly in earth or concrete foundations (Ufer grounds).
ENGINEERING OVERVIEW
Conductor Size: 3/0Â
Construction: 19-StrandÂ
Temper: Soft-Drawn (Annealed)
Material: Bare Copper (Uninsulated)
Overall Diameter (OD): 0.470 inches (11.94 mm)
Approx. Weight: 518.1 lbs per 1,000 ft (0.5181 lb/ft)
DC Resistance at 20ºC: 0.06304 Ohms/1,000 ft
Rated Breaking Strength: 5,074 lbs
Ampacity Rating: 410 Amps (Based on 75°C conductor temp; 25°C ambient; 2ft./sec. wind in sun)
Compliance Standards: ASTM B-3 (Soft/Annealed), ASTM B-8 (Concentric-Lay), Federal Spec QQ-W-343Â
Commercial Panel Grounding: Reliably bonding heavy-duty 400A to 800A main service electrical panels to subterranean electrodes.
Substation Grid Systems: The contractor-preferred wire for laying grid meshes and connecting utility-grade transformers to safety grounds.
Harsh Industrial Ground Rings: Forming high-mass ground loops around data centers, processing plants, and critical manufacturing hubs.
Lightning Down-Conductors: Providing an open, heavy-gauge pathway to ground lightning currents safely on commercial towers, high-rises, and facilities.
Renewable Energy Infrastructure: Widely specified for bonding massive structural mounting racks and equipment rows across large commercial solar farms.
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.
Â
| Wire Size (AWG/MCM) | 3/0 |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 19 |
| Outer Diameter (OD) (in/mm) | 0.470 in. |
| Conductor Count | 1 |
| Shield | Unshielded |
| Ampacity Rating | 410 |
| Direct Burial Rating | Yes |
| Submersible | No |
| Sunlight Resistance Rating | Yes |
| Standards | ASTM B-1 Hard-drawn copper wire ASTM B-2 Medium-hard drawn copper wire ASTM B-3 Soft or annealed copper wire ASTM B-8 Concentric-lay stranded copper conductors: hard, medium-hard, or soft ASTM B-33 Tinned soft or annealed copper wire ASTM B-258 Federal Sepc QQ-W-369 |
| Miscellaneous Information | All values are nominal and subject to correction. *Ampacity based on 75ºC conductor temperature; 25ºC ambient temperature; 2ft./sec. wind in sun. |
| Primary Applications | Grounding Systems, Overhead Power Distribution, Ground Wire for Lightning Protection, Bonding Applications, Messenger and Support Wires |
| Common Uses |
|
| Weight per Foot | 0.5181 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.
Parent SKU : BCSTR3/0-19
SKU : BCSTR3/0-19-250
Parent SKU : BCSTR3/0-19
SKU : BCSTR3/0-19-250
"Designed for high-capacity grounding, bonding, and primary power distribution, this 3/0 AWG Stranded Bare Copper wire is engineered for elite electrical performance. Featuring a premium 19-strand concentric-lay construction and soft-drawn (annealed) composition, it delivers an optimal blend of field flexibility and physical mass, making it an ideal choice for utility substations, industrial facilities, and heavy commercial infrastructure."
This conductor is an excellent option for utility substation grounding grids, high-amp commercial service entrances, industrial facilities, and heavy-duty lightning protection networks. Moving up to the 3/0 gauge provides a massive cross-sectional area over smaller conductors, ensuring a safer, ultra-low-impedance path to ground to dissipate severe fault currents or lightning strikes. Its heavy 19-strand concentric-lay construction maximizes physical toughness for rugged environments, while the high-purity copper guarantees a permanent, maintenance-free structural lifespan.
High-Capacity Conductivity: 99.9% pure, uninsulated copper provides an ultra-low-impedance path to clear high-magnitude fault currents and lightning surges safely.
Premium 19-Strand Flexibility: Interweaving 19 individual strands creates a remarkably pliable conductor that easily conforms to structural contours, grounding loops, and tight radius bends.
Soft-Drawn (Annealed): The thermal annealing process softens the copper’s crystalline matrix, eliminating mechanical memory and making the cable highly workable for field technicians.
Direct Burial Resilience: Uninsulated bare copper natively fights off moisture, oxidation, and aggressive soil chemistries, ensuring permanent, maintenance-free placement directly in earth or concrete foundations (Ufer grounds).
ENGINEERING OVERVIEW
Conductor Size: 3/0Â
Construction: 19-StrandÂ
Temper: Soft-Drawn (Annealed)
Material: Bare Copper (Uninsulated)
Overall Diameter (OD): 0.470 inches (11.94 mm)
Approx. Weight: 518.1 lbs per 1,000 ft (0.5181 lb/ft)
DC Resistance at 20ºC: 0.06304 Ohms/1,000 ft
Rated Breaking Strength: 5,074 lbs
Ampacity Rating: 410 Amps (Based on 75°C conductor temp; 25°C ambient; 2ft./sec. wind in sun)
Compliance Standards: ASTM B-3 (Soft/Annealed), ASTM B-8 (Concentric-Lay), Federal Spec QQ-W-343Â
Commercial Panel Grounding: Reliably bonding heavy-duty 400A to 800A main service electrical panels to subterranean electrodes.
Substation Grid Systems: The contractor-preferred wire for laying grid meshes and connecting utility-grade transformers to safety grounds.
Harsh Industrial Ground Rings: Forming high-mass ground loops around data centers, processing plants, and critical manufacturing hubs.
Lightning Down-Conductors: Providing an open, heavy-gauge pathway to ground lightning currents safely on commercial towers, high-rises, and facilities.
Renewable Energy Infrastructure: Widely specified for bonding massive structural mounting racks and equipment rows across large commercial solar farms.
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.
Â
| Wire Size (AWG/MCM) | 3/0 |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 19 |
| Outer Diameter (OD) (in/mm) | 0.470 in. |
| Conductor Count | 1 |
| Shield | Unshielded |
| Ampacity Rating | 410 |
| Direct Burial Rating | Yes |
| Submersible | No |
| Sunlight Resistance Rating | Yes |
| Standards | ASTM B-1 Hard-drawn copper wire ASTM B-2 Medium-hard drawn copper wire ASTM B-3 Soft or annealed copper wire ASTM B-8 Concentric-lay stranded copper conductors: hard, medium-hard, or soft ASTM B-33 Tinned soft or annealed copper wire ASTM B-258 Federal Sepc QQ-W-369 |
| Miscellaneous Information | All values are nominal and subject to correction. *Ampacity based on 75ºC conductor temperature; 25ºC ambient temperature; 2ft./sec. wind in sun. |
| Primary Applications | Grounding Systems, Overhead Power Distribution, Ground Wire for Lightning Protection, Bonding Applications, Messenger and Support Wires |
| Common Uses |
|
| Weight per Foot | 0.5181 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.
Get notified when this product is back in stock
Physical Specifications
Technical Specifications
Usage & Installation:
Packaging & Dimensions:
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3/0 is a heavy-duty conductor typically used for high-amperage grounding. It is most commonly found as the main grounding wire for large industrial buildings, buried ground rings for sensitive facilities (like data centers), and as a primary grounding source for utility-scale transformers and substations.
The nominal outside diameter (OD) of a 3/0 stranded bare copper wire is approximately 0.470 inches (11.94 mm).
Minimum Requirement: For a single 3/0 bare copper grounding wire installed purely for physical protection, a 1-inch PVC or EMT conduit is the absolute code minimum.
Recommended: A 1-1/4 inch or 1-1/2 inch conduit is strongly recommended for runs with multiple bends or long pull distances. At nearly half an inch thick, 3/0 copper is heavy and rigid; a larger pipe ensures a much smoother pull and prevents the wire from binding.
Yes. This wire can be buried directly in the soil and for encasement in concrete (often referred to as a Ufer ground or concrete-encased electrode). High-purity electrical copper naturally resists moisture and soil-based chemical degradation, making it the industry standard for permanent underground grounding grids.
Note: While copper resists most soil conditions, always check local codes if you are dealing with highly acidic or chemically treated soils.
In the American Wire Gauge (AWG) system, 3/0 (three-ought) is larger than 2/0 (two-ought). The 3/0 wire contains more copper cross-sectional area, meaning it has lower electrical resistance and can safely dissipate significantly higher fault currents—such as those from major industrial equipment short circuits or direct lightning strikes.
Yes. Soft-drawn, high-purity concentric bare copper handles thermal welding, hydraulic crimps, and mechanical ground clamps flawlessly, producing strong, permanent, low-resistance connections underground.
Wire America ships directly from regional hubs across the country. Most customers receive their order within 2 to 4 business days, and we offer expedited overnight shipping at checkout for emergency project deadlines. We offer bare copper wire in sizes 18 awg to 1250 MCM available by the foot and by the bulk spools.
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