Heavy Bare Pure Copper 110 Wire — Thick Solid Copper Wire

Heavy bare pure copper 110 wire — also called thick solid copper wire, large-gauge bare copper wire, grounding copper wire, or heavy copper conductor — is single-strand, uncoated, 99.9% pure copper 110 wire in the large-diameter range. Its thick solid cross-section carries high current and creates low-resistance grounding and bonding paths, while remaining easy to bend, clamp, crimp into lugs, and solder or braze. US buyers use heavy bare copper wire for grounding and bonding systems, battery and inverter cables, bus and jumper links, power distribution, welding and high-current equipment, solar and off-grid systems, RV, automotive and marine wiring, antenna and electric-fence grounds, and electrical repairs. It is supplied in 10-meter units in the United States.

This heavy wire is selected by its diameter in millimeters, with the approximate American Wire Gauge (AWG) shown in brackets. Because it is bare, it has no insulation and is used directly as a conductor, ground, or bonding path.

What Is Heavy Bare Copper Wire?

Pure copper 110 is commercial-grade 99.9% pure copper valued for high electrical and thermal conductivity, natural corrosion resistance, and excellent ductility. Drawn into heavy single-strand wire, it becomes a rigid-yet-bendable solid conductor suited to high-current and grounding duty. It remains one solid strand (not stranded) and bare (no coating). US buyers search this range as “heavy copper wire,” “thick solid copper wire,” “large gauge copper wire,” “bare grounding wire,” “solid copper conductor,” “battery copper wire,” and by millimeter or AWG diameter. Smaller sizes are supplied as fine bare copper wire, and audio-grade single-crystal wire is supplied separately as 6N OCC wire.

Diameter Sizes and Approximate AWG

Heavy wire is ordered by millimeter diameter, with the closest AWG shown as a guide. Each diameter is a single solid strand, bare and uncoated, supplied in standard 10-meter units.

AWG numbers are approximate because American Wire Gauge sizes do not convert to round millimeter values. Smaller diameters are supplied as fine bare copper wire on 100-meter spools, and the full range is in the copper wire collection.

Key Properties of Heavy Bare Copper Wire

Why Choose Heavy Bare Copper Wire

• Low-resistance grounding — thick solid copper creates dependable equipment, antenna, and system grounding and bonding paths.
• High-current battery and inverter links — the standard conductor for battery banks, RVs, solar/off-grid systems, and power equipment.
• Easy to terminate — bends to route and accepts crimp lugs, clamps, bolted bus connections, and soldered or brazed joints.
• Convenient 10-meter units — a fixed length suits installations, repairs, and cable builds without buying excess conductor.
• Millimeter and AWG sizing — order by exact millimeter diameter with the approximate AWG shown for familiar US selection.
• Corrosion resistant — bare copper 110 withstands service environments and is widely used for exposed grounding conductors.

How to Order Heavy Wire

Common Applications

Industries That Use Heavy Bare Copper Wire

• Electrical contractors & power — grounding, bonding, bus connections, and service-equipment links.
• Solar, off-grid & backup power — battery, inverter, and charge-controller high-current conductors.
• Automotive, RV & marine — battery cables, chassis grounds, and heavy equipment power leads.
• Welding & industrial equipment — high-current leads, work returns, and machine grounding.
• Telecom & RF — tower and equipment grounding, antenna bonding, and low-resistance earth connections.
• Maintenance, repair & DIY — custom battery builds, fence and antenna grounds, and power upgrades.

Working & Termination Notes

Heavy bare copper wire is routed and bent by hand or with bending tools, then cut to length and terminated with crimp or compression lugs, mechanical clamps, bolted bus connections, or by soldering and brazing. The solid strand holds its routed shape and gives a large contact area when the lug or clamp is seated fully. As an uninsulated conductor, it should be kept clear of unintended contact with other conductors or metalwork and supported along long runs. Copper’s natural corrosion resistance makes it suitable for exposed grounding duty, and the bare surface should be kept clean at every termination for a low-resistance joint.

Solid Wire vs Stranded Cable

• Solid bare wire (this product) is one thick strand; it holds shape, suits fixed grounding and bus links, and terminates simply in lugs and clamps.
• Stranded cable is built from many thin strands for flexibility in repeatedly moved leads and cable assemblies.
• Both conduct; solid wire is chosen for fixed, stationary high-current and grounding installations.

Unit Lengths and Custom Requirements

Heavy bare pure copper 110 wire is supplied in 10-meter units as one continuous solid length per unit. Diameters outside the standard range, different lengths, or additional processing are handled as custom orders, with handling time extended according to the difficulty and complexity of the work. Smaller-diameter conductor is supplied as fine bare copper wire on 100-meter spools.

Shipping & Delivery

Heavy Bare Copper Wire FAQ