“Designed for maximum electrical performance, heavy-duty grounding, bonding, and primary power distribution, this 4/0 AWG Stranded Bare Copper wire is engineered for the highest-capacity infrastructure demands. Featuring soft-drawn (annealed) construction and a high-flexibility 19-strand layout, it delivers an optimal blend of field bendability and high electrical mass, making it a reliable solution for utility substations, data centers, and heavy industrial facilities.”

Why Professionals Choose 4/0 AWG 19-Strand Bare Copper

4/0 conductor is a primary choice for high-amperage commercial service entrances, heavy industrial grounding rings, and robust lightning protection networks. This size has a low-impedance path capable of safely clearing major fault currents or lightning surges. When pulling through tight conduit systems or routing intricate ground loops around structural steel, standard 7-strand wire can become incredibly rigid. This premium 19-strand layout splits that same heavy copper mass into nineteen finer individual strands, drastically reducing cable stiffness, cutting installation stress, and allowing smoother field bends without sacrificing structural longevity.

• Maximum Conductivity: 99.9% pure, uninsulated copper delivers an open, low-impedance path to ground to safely absorb high-amperage short circuits.

• Premium 19-Strand Flexibility: Concentric 19-wire engineering creates a remarkably pliable conductor that easily conforms to tight radiuses, equipment corners, and grounding busbars.

• Soft-Drawn (Annealed): The thermal annealing process softens the copper’s crystalline matrix, removing stubborn mechanical wire memory and making the cable highly workable for field technicians.

• Direct Burial Resilience: Uninsulated bare copper natively fights off moisture, oxidation, and aggressive soil chemistry, removing the need for a protective jacket when buried or cast in stone.

Technical Specifications: 4/0 Stranded Bare Copper Wire (19-Strand)

ENGINEERING OVERVIEW

• Conductor Size: 4/0

• Construction: 19-Strand

• Temper: Soft-Drawn (Annealed)

• Material: Bare Copper (Uninsulated)

• Overall Diameter: 0.528 inches (13.41 mm)

• Approx. Weight: 653.0 lbs per 1,000 ft (0.653 lb/ft)

• DC Resistance at 20C: 0.0499 Ohms/1,000 ft

• Rated Breaking Strength: 6,453 lbs

• Ampacity Rating: 480 Amps (Based on 75C conductor temp; 25C ambient; 2ft./sec. wind in sun)

• Compliance Standards:ASTM B-3 (Soft/Annealed), ASTM B-8 (Concentric-Lay), Federal Spec QQ-W-343

Common 4/0 bare copper applications

• Industrial & Commercial Grounding Rings: The master gauge standard for burying deep ground loops around data centers, massive hospitals, and heavy industrial facilities.

• Substation Grid Meshes: Essential for weaving primary subterranean safety grids and bonding multi-megawatt high-voltage utility transformers.

• Main Commercial Service Entrances: Connecting heavy-duty 600A, 800A, and 1200A main service electrical distribution panels safely to ground.

• High-Capacity Lightning Protection: Serving as the uninsulated, high-mass down-conductor backbone for commercial skyscrapers, communication masts, and industrial towers.

• Renewable Energy Sub-Feeds: Extensively used for long-run, critical bonding of massive structural framing racks, solar inverter skids, and wind turbine grounding terminals.

Technical Note: All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyers responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.