10M Pure Copper Cable Bare Copper Wire Solid Round Coil Diameter: 0.2mm - 0.6mm

For light grounding and bonding in low-voltage DC systems (under 30 V), 0.5 mm or 0.6 mm solid bare copper wire is typically adequate. For mains-voltage grounding inside walls or panels, consult your local electrical code — this wire is not rated for that use and a larger, insulated conductor is required.

Yes. Solid bare copper wire is a common choice for hand-wound RF inductors and antenna elements because the uncoated surface allows direct contact between turns when close-wound, and the solid core holds its shape after forming. Finer gauges (0.2–0.3 mm) are used for high-turn-count coils; 0.4–0.6 mm suits larger-diameter coils with fewer turns.

Bare copper does develop a surface oxide layer when exposed to air and humidity. For electrical connections, oxidation increases contact resistance at termination points — applying flux before soldering or using a mechanical crimp removes the oxide layer at the joint. For decorative wire-wrapping, a light coat of clear lacquer after shaping preserves the bright copper appearance.

Bare copper wire solid round stock is widely used in jewelry and craft wire-wrapping. The 0.2–0.4 mm range is soft enough to wrap by hand around stones and findings, while 0.5–0.6 mm holds structural shapes such as rings and frames. Note that bare copper may leave a green patina on skin with prolonged contact; sealing finished pieces with jeweler's lacquer addresses this.

Measure the total run length of your project, then add 10–15% for terminations, waste, and any re-dos. Each unit in this listing equals 10 metres. For example, a project needing 45 m would require at least 5 units (50 m). Ordering one tier above your calculated minimum is a practical buffer for complex projects.

Solid bare copper wire can be inserted into crimp connectors sized for the wire's cross-sectional area. Because it is solid (not stranded), it does not compress as much as stranded wire under a crimp — use connectors rated for solid conductors where possible. For solder lugs, the bare surface accepts standard rosin-core solder without pre-tinning, though a brief flux application improves wetting speed.

Solid wire consists of a single conductor and holds its shape after bending, making it suited for fixed installations, coil winding, and shaped craft work. Stranded wire bundles multiple thin conductors together, giving it greater flexibility for applications that involve repeated movement or vibration. Choose solid for static, formed, or coil-wound uses; choose stranded for flexible leads and wiring harnesses.