Bare Copper Wire

Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s. The invention of the telephone in 1876 created further demand for copper wire as an electrical conductor.

Copper is the electrical conductor in many categories of electrical wiring. Copper wire is used in power generation, power transmission, power distribution, telecommunications, electronics circuitry, and countless types of electrical equipment. Copper and its alloys are also used to make electrical contacts. Electrical wiring in buildings is the most important market for the copper industry. Roughly half of all copper mined is used to manufacture electrical wire and cable conductors.

The main grade of copper used for electrical applications is electrolytic-tough pitch (ETP) copper (CW004A or ASTM designation C11040). This copper is at least 99.90% pure and has an electrical conductivity of at least 101% IACS. ETP copper contains a small percentage of oxygen (0.02 to 0.04%). If high conductivity copper needs to be welded or brazed or used in a reducing atmosphere, then oxygen-free copper (CW008A or ASTM designation C10100) may be used.

Several electrically conductive metals are less dense than copper, but require larger cross sections to carry the same current and may not be usable when limited space is a major requirement.

Packing Details

Usha Conductors makes Enamelled Wires and supplied on plastic spools.
These spools are generally according to specifications:

• IEC 60264-2-2: Specification for Cylindrical Barrelled plastic spools, returnable type.
• IEC 60264-3-2: Specification for Taper Barrelled plastic spools, returnable type.
• Indian equivalent Cylindrical Barrelled plastic spools, non-returnable type.

Cylindrical Barrelled Spools

Taper Barrelled Spools

Other Spools available on request.