{"product_id":"copper-round-wire-t2-solid-red-copper-bare-line","title":"Copper Round Wire T2 Solid Red Copper Bare Line Ø 0.3\/0.4\/0.5\/0.6\/0.8\/1\/1.5~8mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eCopper Round Wire T2 Bare Solid Red Copper — Precision Conductivity for Electrical, Craft \u0026amp; Jewelry Work\u003c\/h2\u003e\n\u003cp\u003eWhen your project demands reliable conductivity and consistent gauge, generic wire falls short. Whether you're a hobbyist winding coils, a jeweler forming wire-wrapped pendants, or an electrician running bare grounding lines, inconsistent diameter and impure alloy create real problems. This T2 solid bare copper round wire is drawn to tight dimensional tolerances so every meter performs the same as the last.\u003c\/p\u003e\n\u003cp\u003eEach spool is made from T2-grade electrolytic copper — a commercially pure copper alloy with copper content ≥99.9%. Available in diameters from Ø0.3 mm (approx. 1\/85 in) up to Ø5 mm (approx. 3\/16 in), with spool lengths ranging from 1 M to 6 M depending on the variant selected. The wire ships in a round cross-section, uncoated and unplated, giving you a true bare copper surface ready for soldering, forming, or direct electrical contact.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include DIY coil winding for transformers and inductors, bare copper grounding conductors in low-voltage electrical panels, wire-wrapping and sculpting in jewelry making, and craft applications such as armature wire for clay modeling or decorative weaving. The range of gauges makes it equally suited for delicate filigree work at Ø0.3 mm and structural forming at Ø4–5 mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚡\u003c\/span\u003e\n\u003cstrong\u003eCompatibility note:\u003c\/strong\u003e This is uninsulated bare copper wire. It is not rated or listed as insulated electrical cable. Confirm your application's voltage, current, and insulation requirements before use in live circuits.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Copper Round Wire Spools\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eT2-Grade Electrolytic Copper (≥99.9% Cu)\u003c\/strong\u003e — Low resistivity and excellent thermal conductivity make this wire suitable for coil winding, grounding, and precision electrical connections where alloy purity matters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eWide Diameter Range: Ø0.3 mm – Ø5 mm\u003c\/strong\u003e — Twelve gauge options in a single product listing let you match the exact cross-section your project requires, from fine jewelry wire to heavier structural forming wire.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eRound Cross-Section, Consistent Tolerance\u003c\/strong\u003e — The circular profile maintains uniform contact area along the entire length, reducing resistance variation in wound coils and ensuring even bending behavior during forming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e \u003cstrong\u003eBare, Uncoated Surface\u003c\/strong\u003e — No enamel, tin, or oxide coating means the wire is immediately solderable and bondable without stripping, and the natural copper color is visible for craft and decorative applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eSpool Lengths from 1 M to 6 M\u003c\/strong\u003e — Shorter lengths (1–2 M) suit one-off craft or repair tasks; longer spools (4–6 M) reduce joins in continuous winding or grounding runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eVersatile Across Disciplines\u003c\/strong\u003e — Used in electronics (coil winding, grounding), jewelry making (wire wrapping, filigree), and craft work (armature wire, decorative weaving) — one wire type covers multiple workbench needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Copper Round Wire\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eT2 Electrolytic Copper (≥99.9% Cu)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWire Form\u003c\/th\u003e\n\u003ctd\u003eRound, solid (not stranded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eBare \/ uncoated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eCopper gold (natural bare copper)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003eØ0.3 mm – Ø5 mm (approx. 0.012 in – 0.197 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Diameters\u003c\/th\u003e\n\u003ctd\u003eØ0.3, 0.4, 0.5, 0.6, 0.8, 1, 1.5, 2, 2.5, 3, 4, 5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpool Length\u003c\/th\u003e\n\u003ctd\u003eSee variant options (1 M – 6 M depending on diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConductivity\u003c\/th\u003e\n\u003ctd\u003eHigh electrical and thermal conductivity (T2 grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInsulation\u003c\/th\u003e\n\u003ctd\u003eNone — bare wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlexibility\u003c\/th\u003e\n\u003ctd\u003eSee variant options (finer gauges more flexible; heavier gauges stiffer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eCoil winding, grounding, jewelry making, craft armature wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight per Spool\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhich diameter should I choose for jewelry wire wrapping?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor fine filigree and delicate wire-wrapped pendants, Ø0.3–0.5 mm works well — it bends easily by hand and holds detail. For structural frames or heavier stone settings, Ø0.8–1.5 mm provides enough rigidity to hold shape without a jig. If you're making rings or bangles, Ø1.5–2.5 mm is a common starting point.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eIs this wire suitable for electrical grounding applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eT2 bare copper wire is widely used for grounding conductors in low-voltage electrical work because of its low resistivity and corrosion resistance relative to other metals. However, this wire is uninsulated and unlisted as rated cable. Always verify that your local electrical code permits bare copper in your specific application and confirm the required cross-sectional area (mm²) for your current load before selecting a diameter.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWill bare copper wire corrode or tarnish over time?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCopper naturally oxidizes when exposed to air and moisture, forming a patina that ranges from light brown to dark brown or green (verdigris) over time. In most electrical applications this surface oxide does not significantly affect conductivity at the contact points. For jewelry or decorative use where appearance matters, you can apply a clear lacquer or anti-tarnish coating after forming. Storing unused wire in a sealed bag slows oxidation.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I solder this wire without stripping or pre-treating it?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Because the wire is bare and uncoated, standard rosin-core or no-clean solder flux bonds directly to the copper surface without stripping. For best results, lightly abrade the contact area with fine sandpaper or a wire brush if the surface has oxidized, then apply flux before soldering. Freshly unspooled wire typically solders without any pre-treatment.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between T2 copper and other copper grades?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eT2 (also written as TU2 or C11000 equivalent) is a commercially pure electrolytic tough-pitch copper with copper content ≥99.9%. It offers a good balance of electrical conductivity (typically ≥97% IACS), workability, and cost. Higher-purity grades (e.g., oxygen-free C10100) are used in audiophile or ultra-precision applications but are rarely necessary for standard coil winding, grounding, or craft work. T2 is the standard choice for most DIY and light industrial uses.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose between the available spool lengths?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eShorter spools (1–2 M) are practical for single-use repairs, small jewelry pieces, or testing a gauge before committing to more. Longer spools (3–6 M) reduce the number of joins in continuous applications like coil winding or running a grounding conductor, which improves both electrical performance and structural integrity. Note that spool length varies by diameter — heavier gauges are available in shorter lengths because the same spool weight yields fewer meters.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eIs this wire compatible with coil winding for transformers or inductors?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBare copper wire can be used for coil winding, but keep in mind that adjacent turns of bare wire will short-circuit unless you add inter-layer insulation (such as Kapton tape or insulating varnish between layers). For single-layer air-core coils or coils where turns are spaced, bare wire works directly. For multi-layer wound coils, enamel-coated magnet wire is typically the better choice. If your design specifically calls for bare copper, this wire is appropriate — just plan your insulation strategy accordingly.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your Diameter and Length above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which diameter should I choose for jewelry wire wrapping?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For fine filigree and delicate wire-wrapped pendants, Ø0.3–0.5 mm works well. For structural frames, Ø0.8–1.5 mm provides rigidity. For rings or bangles, Ø1.5–2.5 mm is a common starting point.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this wire suitable for electrical grounding applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"T2 bare copper wire is widely used for grounding conductors in low-voltage electrical work. It is uninsulated and unlisted as rated cable. Always verify local electrical code requirements and confirm the required cross-sectional area for your current load.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will bare copper wire corrode or tarnish over time?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Copper naturally oxidizes forming a patina over time. In electrical applications this does not significantly affect conductivity. For decorative use, apply a clear lacquer or store unused wire in a sealed bag to slow oxidation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I solder this wire without stripping or pre-treating it?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The bare uncoated surface bonds directly with standard rosin-core or no-clean solder flux. Lightly abrade oxidized surfaces before soldering for best results.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between T2 copper and other copper grades?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"T2 is a commercially pure electrolytic copper with ≥99.9% copper content and typically ≥97% IACS conductivity. It is the standard choice for most DIY coil winding, grounding, and craft applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose between the available spool lengths?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Shorter spools (1–2 M) suit single-use tasks. Longer spools (3–6 M) reduce joins in continuous winding or grounding runs. Spool length varies by diameter — heavier gauges yield fewer meters per spool.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this wire compatible with coil winding for transformers or inductors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bare copper wire can be used for single-layer air-core coils. For multi-layer wound coils, add inter-layer insulation (Kapton tape or varnish) between layers, or use enamel-coated magnet wire instead.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Φ0.3mm \/ 5M","offer_id":52378295140626,"sku":"CHERRY013473x1","price":16.29,"currency_code":"USD","in_stock":true},{"title":"Φ0.4mm \/ 5M","offer_id":52378295173394,"sku":"CHERRY013474x1","price":16.52,"currency_code":"USD","in_stock":true},{"title":"Φ0.5mm \/ 6M","offer_id":52378295206162,"sku":"CHERRY013475x1","price":17.24,"currency_code":"USD","in_stock":true},{"title":"Φ0.6mm \/ 5M","offer_id":52378295238930,"sku":"CHERRY013476x1","price":16.66,"currency_code":"USD","in_stock":true},{"title":"Φ0.8mm \/ 5M","offer_id":52378295271698,"sku":"CHERRY013477x1","price":16.73,"currency_code":"USD","in_stock":true},{"title":"Φ1mm \/ 6M","offer_id":52378295304466,"sku":"CHERRY013478x1","price":17.56,"currency_code":"USD","in_stock":true},{"title":"Φ1.5mm \/ 4M","offer_id":52378295337234,"sku":"CHERRY013479x1","price":19.57,"currency_code":"USD","in_stock":true},{"title":"Φ2mm \/ 4M","offer_id":52378295370002,"sku":"CHERRY013480x1","price":25.05,"currency_code":"USD","in_stock":true},{"title":"Φ2.5mm \/ 3M","offer_id":52378295402770,"sku":"CHERRY013481x1","price":27.89,"currency_code":"USD","in_stock":true},{"title":"Φ3mm \/ 2M","offer_id":52378295435538,"sku":"CHERRY013482x1","price":26.66,"currency_code":"USD","in_stock":true},{"title":"Φ4mm \/ 2M","offer_id":52378295468306,"sku":"CHERRY013483x1","price":38.41,"currency_code":"USD","in_stock":true},{"title":"Φ5mm \/ 1M","offer_id":52378295501074,"sku":"CHERRY013484x1","price":30.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-03_59f635d9-3247-4c3e-a4db-9828e85f2742.jpg?v=1781766760","url":"https:\/\/homediyer.com\/products\/copper-round-wire-t2-solid-red-copper-bare-line","provider":"HomeDIYer","version":"1.0","type":"link"}