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Copper-Clad Aluminum Wire Guide: Pros, Cons, and What You Need to Know

Close-up view of several coiled copper clad aluminum wires, showcasing their smooth, shiny, metallic surface and parallel arrangement.

Copper-clad aluminum wire (CCA) is a widely used type of electrical wiring known for its balance of performance and affordability. With applications in various industries, CCA offers a practical solution for many wiring needs. Its unique construction combines the benefits of two metals, making it a popular choice in both commercial and residential settings.

What is Copper Clad Aluminum Wire (CCA)?

Copper-clad aluminum wire (CCA) is a bimetallic conductor consisting of an aluminum core and an outer layer of copper. This unique structure is created by metallurgically bonding the two metals—aluminum at the center, copper on the exterior—resulting in a wire that combines the properties from both materials. Copper-clad aluminum wire has similar AC conductivity to solid copper (at frequencies greater than 5MHz) while being uniquely suited to applications where weight is critical.

Copper-clad aluminum is just one of the many types of clad metal wires available from MWS Wire Industries. MWS has a diverse selection of clad metals, each offering unique combinations of conductivity, strength, weight, and corrosion resistance to meet highly specialized requirements.

For more information see our Clad Metals page.

Why Use Copper Clad Aluminum Wire?

There are several compelling reasons to consider CCA wire for your applications:

Lightweight: Elemental aluminum is about 70% lighter than copper. CCA’s predominantly aluminum core thus makes it easier to handle, transport, and install, especially in large-scale projects or weight-critical use cases.
Electrical Performance: The copper cladding enhances conductivity over pure aluminum wire, while providing decent overall performance for many application.
Versatility: CCA wires are widely used in applications ranging from audio and telecommunications to power transmission—provided installation requirements are properly considered.
Re-engineering: CCA wire is often used when updating legacy systems with new wiring in aerospace applications where weight is heavily considered as a design constraint.

What do the Statistics Say About Copper-Clad Aluminum Wire

Conductivity: CCA wire typically achieves between 60-70% of the electrical conductivity of solid copper wire, yet performs better than pure aluminum wire for electricity transmission
Types of Copper Clad Aluminum: MWS typically produces CCA wire that is either 10% or 15% copper by cross sectional area
- CCA 10% has 62.9% of the conductivity of annealed copper wire (IACS)*.
- CCA 15% has 64.4% of the conductivity of annealed copper wire (IACS).
Weight Comparison: CCA can be 40% lighter than copper wire with an equivalent gauge, reducing shipping and installation costs.

* IACS is an acronym for International Annealed Copper Standard, which is used as a benchmark when measuring electrical conductivity. Annealed Copper is defined to be 100% IACS at 20°C.

When and How to Use Copper-Clad Aluminum Wire

CCA is best suited for applications where:

Weight and space constraints are significant such as retrofitting existing designs and designing aerospace applications.
High-frequency signals are involved (since the skin effect causes current to travel mostly at the surface, copper layer).
Mechanical flexibility (for installation) is desirable, given the lighter weight and increased pliability.

Things to consider when switching to Copper-Clad Aluminum Wire:

Copper-Clad Aluminum has its pros and cons, here’s what you should consider if switching from copper wire:

Upsize Your Wire: If you replace copper with CCA, choose a thicker gauge to compensate for lower conductivity.
Check Terminal Compatibility: Make sure any connectors used are rated for CCA to avoid galvanic corrosion.
Avoid Overloading: Ensure ampacity ratings are not exceeded to prevent overheating or fire risk—a common hazard when wire diameter or quality is misjudged.

Questions to Ask Before Choosing Copper-Clad Aluminum (CCA)

Is the wire gauge appropriate for the intended current?

Since CCA is less conductive than copper, you may need to increase the gauge size.

What is the installation environment?

High-moisture or vibration-prone locations can expose CCA to accelerated corrosion or mechanical fatigue if not properly terminated.

Will the application demand high mechanical strength or frequent bending?

CCA is less robust than solid copper and can fracture more easily under repeated flexing.

Long-term reliability vs. cost?

For mission-critical, long-term, or outdoor installations, the use of all-copper conductors may be warranted.

Where Is CCA Wire Used? Common Applications

Cooper Clad Aluminum wire is used across several industries including:

Music: Amplification, Noise elimination and high performance audio
Power: Wireless chargers, custom power supplies
Aerospace, military, commercial: Extreme temperature sensors, noise control, custom magnetics, underwater sensors
Space propulsion systems, sensors: Booms (Retractable tube for inflight transfer of fuel)
Specialty resistors and capacitors: Wireless power transfer systems using inductive coupling through magnetic field

How MWS Sets the Standard for CCA Engineering and Quality

At MWS Wire Industries, we pride ourselves on delivering unmatched quality and service. Our extensive inventory includes a variety of clad metal wire options, including copper clad aluminum, copper clad steel, copper clad stainless steel, and nickel clad copper. Each product is engineered to meet stringent industry standards and customized to your exact specifications. MWS offers both 10% and 15% CCA in 14 through 38 AWG.

Benefits of working with MWS Wire:

Low Minimum Orders: Whether you need a small prototype batch or a large production run, we accommodate orders from 1/4 lb. to 50 lb. spools.
Custom Solutions: From pre-cut lengths to special shapes and finishes, our expert team can provide the perfect clad metal wire for your application.
Compliance and Documentation: We offer comprehensive compliance documentation, including RoHS, REACH, DFARS, and more, ensuring peace of mind for your projects.

Discover the MWS Wire Difference

Whether you’re seeking the superior conductivity of copper clad wire or the specialized benefits of other clad metal wire types, MWS Wire Industries is your trusted partner. Explore our clad metals wire selection today or contact our knowledgeable team for personalized assistance. Experience the next generation of wire technology with MWS—where quality, innovation, and customer satisfaction come together.