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When your electrical panel, battery bank, or grounding system demands a conductor that won't let you down, a substandard bar creates heat, resistance, and risk. Makers, electricians, and industrial fabricators who need a dependable copper flat bar turn to T2-grade pure copper — the go-to choice for bus bar applications where conductivity and dimensional accuracy matter.
This T2 copper flat bar is machined from pure Cu stock with a smooth, mill-finished surface. Thickness ranges from 10 mm to 55 mm (approx. 0.39 in – 2.17 in), width from 10 mm to 150 mm (approx. 0.39 in – 5.91 in), and length in either 100 mm (3.94 in) or 200 mm (7.87 in) cuts. Each piece is a solid rectangular section — no hollow core, no seams.
Typical use cases include DIY copper bus bar wiring for lithium battery packs, electrical switchgear busbar fabrication, custom grounding straps for solar and off-grid systems, and short-run copper flat bar stock for CNC machining or hand fabrication.
T2 designation indicates high-purity copper with minimal impurities, delivering electrical conductivity typically ≥99.9% IACS — essential for low-resistance bus bar connections.
Thickness 10–55 mm × Width 10–150 mm × Length 100 or 200 mm. Select the exact cross-section your current load and enclosure require without cutting waste.
Full solid cross-section with no hollow core or seams, providing consistent conductivity and mechanical strength across the entire bar length.
Smooth mill finish allows direct bolted connections or easy surface preparation for tin plating, silver plating, or oxidation-inhibiting compound application.
T2 copper machines cleanly with standard HSS or carbide tooling. Drill, tap, or mill bolt holes and connection slots without cracking or delamination.
Designed for battery bank bus bars, switchgear busbars, grounding conductors, solar system interconnects, and custom electrical fabrication projects.
| Material | T2 Pure Copper (Cu ≥99.9%) |
|---|---|
| Item Type | Flat Bar / Bus Bar Strip |
| Thickness Range | 10 mm – 55 mm (0.39 in – 2.17 in) |
| Width Range | 10 mm – 150 mm (0.39 in – 5.91 in) |
| Length Options | 100 mm (3.94 in) / 200 mm (7.87 in) |
| Surface Finish | Mill Finish (bare copper) |
| Cross-Section | Solid rectangular, no hollow core |
| Conductivity | Typically ≥99.9% IACS (T2 grade) |
| Hardness | See variant options |
| Weight per Piece | See variant options |
| Quantity per Order | 1 piece |
Match the cross-sectional area (thickness × width in mm²) to your expected continuous current load. As a conservative rule of thumb, pure copper bus bars can carry approximately 1–2 A per mm² depending on ventilation and ambient temperature. For example, a 10 mm × 30 mm bar (300 mm²) can typically handle 300–600 A in well-ventilated conditions. Always consult your local electrical code and a qualified engineer for safety-critical installations.
T2 is a Chinese national standard designation for high-purity copper that is functionally equivalent to C11000 (Electrolytic Tough Pitch, ETP) copper used in North American and European standards. Both have copper purity ≥99.9% and are widely used for electrical conductors, bus bars, and grounding applications.
Bare copper naturally forms a thin oxide layer (patina) when exposed to air and moisture. For electrical connections, this surface oxidation can increase contact resistance. To prevent this, apply an oxidation-inhibiting compound (such as NO-OX-ID or similar) at contact points, or consider tin-plating the contact surfaces. In dry, enclosed enclosures, bare copper bus bars perform reliably for many years without treatment.
Yes. T2 pure copper flat bar is widely used for grounding conductors, earth bus bars in electrical panels, and bonding straps in solar, off-grid, and industrial systems. Its high conductivity ensures low impedance ground paths. Verify sizing against your local grounding code requirements (e.g., NEC, IEC) for the specific fault current levels in your system.
Yes. The mill-finished surface is compatible with standard bolted copper lugs, compression terminals, and bus bar connectors. Drill the appropriate bolt hole diameter for your lug hardware. For best contact, clean the surface with fine abrasive or a wire brush before assembly and apply an anti-oxidant compound.
T2 copper is soft and machinable. Use HSS or carbide-tipped drill bits with cutting oil for clean holes. For cutting, a metal-cutting bandsaw, angle grinder with a metal disc, or hacksaw works well. Avoid high-speed dry cutting without lubrication, as copper can work-harden and load up cutting edges. Deburr all cut edges before assembly to prevent sharp contact points.
The available sizes are listed in the variant selector above (Thickness × Width × Length). If you need a size combination not shown, please use the Contact Us page to inquire about custom cuts. We will do our best to accommodate specific project requirements.
