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Copper-Clad Aluminum Round Wire
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Copper-clad aluminum round wire combines a copper surface with a lightweight aluminum core. It serves cable designs whose governing standards permit CCA, with the conductor role, section and connection matched to the electrical duty.
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Construction and specification
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| Item | Specification |
|---|---|
| Material construction | Aluminum core with copper cladding; copper proportion is expressed on a mass or volume basis |
| Product form | Round wire |
Specification design factors
Drawing-defined specification
Geometry and performance
- Diameter and ovality determine the metal section and fit in the finished assembly.
- Resistance depends on material, section, length and temperature.
- Temper and surface condition affect drawing, bending and joining.
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Conductor roles
A coaxial center conductor carries a high-frequency signal; a low-voltage concentric neutral carries its designed neutral current; a medium-voltage metallic screen carries the specified screen and fault duty. These roles use different resistance, mechanical and connection criteria.
Material construction
The copper surface and aluminum core share the conductor section. Copper proportion, diameter and temper influence resistance, mass and forming behavior. Mass percentage and volume percentage express different ratios.
Category cable and power duty
Where an Ethernet or PoE cable specification requires copper, CCA is not a default substitute. Passing signal tests cannot establish permission to use a different conductor material.
Application design reference
Track lighting round conductorsDesign reference for low-voltage DC track conductors only — not an approved mass substitution.
Engineering comparison reference
CCA-to-copper diameter comparisonFixed-condition engineering models for AWG 6–30; not certified current ratings or direct substitution approval.
Material and form references
ASTM B566-04a(2025) covers bare round copper-clad aluminum wire, with classes and requirements for the single-wire construction.
Standards and product formsProduct questions
What determines a round conductor’s electrical and forming behavior?
Metal construction, diameter and temper define the conductor section. Resistance varies with length and temperature. Surface condition, coating and any insulation affect joining and the finished assembly diameter.
Is copper proportion the same as electrical conductivity?
No. Copper proportion describes a mass, volume or area basis. Conductivity describes electrical behavior under stated measurement conditions. The supplied construction identifies both, together with section, material condition and resistance.
Which diameter belongs in the conductor specification?
Bare diameter and ovality describe the metal section. Coating or insulation adds to the finished diameter. Keep the electrical measurement length and temperature with the resistance value for that construction.
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- Bare conductor diameter, tolerance and finished diameter if coated or insulated
- Temper, required resistance and termination
- Core and outer-layer metals, each layer or ratio, and mass or volume basis
- Surface finish or coating, joining method and inspection requirements
- Quantity, spool or coil format, packaging and delivery destination
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