Why Is Copper Wire Better Than Aluminum? [Answered]

For your PV installation, have you thought about aluminum wiring?  It is well known that copper costs a lot more than aluminum.  Given that information alone, it might seem like a simple decision. Let’s look at Why Is Copper Wire Better Than Aluminum? Some of these elements aid in your decision regarding the suitability of the two for the position.

Why Is Copper Wire Better Than Aluminum?

Aluminum wiring is frequently preferred to copper wiring. Because copper has a tensile strength of around 40% higher than aluminum, it is less prone to break. This is significant because electrical wiring is occasionally placed by pushing it through feeders and ports.

Copper Wire Better Than Aluminum

Copper Vs Aluminum Wire

Cost savings are the primary factor in choosing aluminum cables over copper cables. Copper and aluminum cables for power in low-voltage installations can be used interchangeably in structures.

Copper is more frequently utilized in communications and control. In actuality, copper makes up the majority of electrical cable materials. The current carrying capacity and resistance of aluminum and copper wires are their key points of distinction.

Copper Vs Aluminum Wire

Compared to an equal copper conductor, aluminum cable has a roughly 40% lower current carrying capability and requires an average 50% bigger cross-sectional area due to its higher resistance.

Generally, replacing copper conductors with aluminum conductors two American Wire Gage sizes larger than copper is usually sufficient.

Aluminum requires a larger raceway or enclosed channel built for holding wires, cables, or bus bars with additional functions because it requires more room to transport the same amperage as copper.

Aluminum Cables

Electrical cables of the type aluminum cables are employed in numerous applications. In general, aluminum cables are less expensive than copper cables and have a greater conductivity-to-weight ratio, allowing them to carry more current for the same weight as copper cables. Aluminum wires, however, are more susceptible to corrosion than copper cables.

Copper Wires

Electrical cables of the copper kind are employed in several different applications. Typically, copper wires cost more than aluminum cables.

They still have a lower conductivity-to-weight ratio than aluminum cables of the same weight, which means they can carry less current. Copper wires are less likely to corrode than aluminum cables, nevertheless.

Advantages Of Aluminum Cable

Aluminum wires are pliable, lightweight, and simple to set up. This makes them perfect for various applications, from home electrical wiring to high-voltage power lines. Additionally, they are less expensive than copper wires.

As a result, they are a fantastic choice for projects where cost is a key consideration. Aluminum cables are suited for wet or humid conditions due to their high conductivity and exceptional corrosion resistance.

Cons Of Aluminum Cable

Aluminum cables’ main drawback is that they are less resilient than copper wires. The metal is softer than copper, which is more vulnerable to damage during installation or use from abrasion or direct contact with other items.

Additionally, aluminum cables need preventive maintenance practices such as routine cleaning or lubrication to improve longevity and performance.

Copper Cable Benefits

Due to its increased tensile strength and resistance to abrasion or other physical effects during installation or operation, copper wire is more durable than aluminum cable.

Because of its strong electrical conductivity, copper cable can transport electricity more effectively than aluminum cable.

Finally, copper wire has a longer lifespan than aluminum cable due to its greater corrosion resistance qualities, which make it less vulnerable to environmental conditions like moisture or humidity.

Copper Cable Drawbacks

Copper cable costs significantly more than aluminum cable because the wire must be produced using higher-quality components at a greater cost.

Additionally, installing the copper cable in confined locations may be challenging because it is heavier than its counterpart.

 Extra effort may be needed to get the wire to fit correctly without kinking or bending excessively.

Additionally, because of its hardness, cutting copper wire requires specific tools, which could raise labor costs for bigger projects involving numerous circuits of wiring that must be installed simultaneously.

Both Positive And Negative Aspects

Aluminum cables have a lower cost and a higher conductivity-to-weight ratio, among other benefits. Aluminum cables have several drawbacks, including a lower strength than copper wires and a propensity for corrosion.

Copper cables have several benefits over aluminum cables, including greater power and corrosion resistance. Copper cables have a higher cost and a worse conductivity-to-weight ratio, among other drawbacks.


Cables made of aluminum and copper can be used for data transmission, power transfer, and electrical wiring, among other things.


Which kind of cable is superior? Why Is Copper Wire Better Than Aluminum? It is dependent upon the particular application and the user’s requirements. As you can see, depending on your project’s size and spending limits, utilizing copper or aluminum for wiring has both advantages and downsides.

Copper is a good choice if you want lightweight and robust, but aluminum is a better option if you want to save money. The choice will ultimately count on the needs of your particular application, so do your study before determining which kind of cable would suit your needs the best!

Frequently Asked Questions

What is copper wire superior?

After silver, copper has the highest conductivity of any metal. This makes it ideal for use in electrical wiring since electricity may flow more freely. It is possible to make electrical wires out of other conductive metals.

Copper vs Aluminum: which is superior?

Aluminum is around 40% less conductive than copper, making copper a better conductor in comparison.

Is it acceptable to substitute aluminum wire for copper?

Low-voltage power lines made of copper or aluminum can be used interchangeably in buildings. Communications and control systems more often use copper.

What distinguishes copper wire from aluminum wire?

Due to its high conductivity and robustness, copper is the chosen material for electrical wire. Additionally, copper is lightweight, resistant to corrosion, and simple to deal with. Aluminum, on the other hand, is significantly more affordable and stronger than copper at high temperatures while having a lesser conductivity than copper.

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