Bare round copper wire is a type of copper conductor that is not covered by an insulating layer. Bare round copper wire is made from pure copper, which has good electrical and thermal conductivity. Copper is a high quality conductive material commonly used in a variety of electrical and electronic applications.

Unlike insulated copper wire, bare round copper wire is not covered by an insulating layer. This means that bare round copper wire requires special insulation when it comes into electrical contact to prevent it from touching other conductors or causing electromagnetic interference.


The wire diameter and cross-sectional area of bare round copper wire can be selected according to the requirements of a specific application. Typically, wire diameter is expressed in standard American Wire Gauge (AWG) or millimeters (mm), while cross-sectional area is expressed in square millimeters (mm²). Selection of the appropriate wire diameter and cross-sectional area depends on the required current capacity, resistance and power transfer requirements.

Bare round copper wire is typically flexible and bendable, which makes it easier to install and route in applications where it needs to be bent or routed through tight spaces. Flexibility makes bare round copper wire suitable for applications requiring flexibility and curved shapes.

Copper has good thermal conductivity, which means that bare round copper wire can conduct heat efficiently. This is important in certain applications, such as welding cables, where heat needs to be dissipated quickly to maintain the normal operating temperature of the wire.

As bare round copper wire has no insulation, it needs to be installed and used with appropriate protective measures. This can include the use of insulating materials such as insulating sleeves, insulating tape or insulating protective covers to ensure that the bare wire does not accidentally come into contact with other conductors or with the human body.

Bare round copper wire is susceptible to corrosion and oxidation when exposed to external environmental conditions. Regular inspection and maintenance are important steps to ensure the performance and durability of bare round copper wire. In applications where corrosion protection is required, consider using coatings, lacquers, or other corrosion protection measures to extend the life of bare wire.