Facts About Copper Clad Aluminum Wire

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    Copper Clad Aluminum Wire is one of copper magnet wire
    Like most industries, the wiring industry will not change immediately. As new technologies emerge, they must prove their value over time before they can be accepted. For a long time, many professionals have expressed doubts about copper-clad aluminum cables (CCA). However, new evidence proves that in some applications, CCA has obvious advantages over pure copper.


    Take a closer look at solid copper
    For more than a century, solid copper has been the standard for many different wiring applications. Over the years, the insulation methods of insulated cables and connectors have changed and developed, but the use of copper conductors has not changed since the electrical wiring system was first used in the 1800s. That's because copper naturally has high conductivity and low resistance. But literally, it comes at a price. Copper is one of the most widely used metals today and is the only metal commonly used as a conductor. This demand makes copper very expensive. The price of copper may be three to four times that of aluminum.

    All the advantages of copper
    Although copper-clad aluminum is not always the best solution, when installing communication cables, CCA allows the cable to take advantage of all the advantages that copper must provide, while maintaining a cheaper price and helping to protect the limited world Copper supply. CCA is made by bonding a layer of pure copper to an aluminum core. Although the drawn CCA obviously contains less copper than the pure copper cable, it provides almost the same conductivity, but the resistance is slightly higher. how can that be? It is related to an electrical phenomenon called the "skin effect".

    Skin effect
    The skin effect is the tendency of high-frequency alternating current (current used in Cat5e and Cat6 cables for data transmission) to be distributed in the conductor, so the current density near the conductor surface (or skin) is higher. As you go deeper into the conductor, the density decreases. Since the skin effect only occurs at high frequencies, it is best to use pure copper cables in all low frequency applications (such as household power lines).

    Skin effect
    Due to the skin effect, you can use a cheaper metal as the core and use copper on the outer layer to achieve almost the same conductivity. A high-quality CCA is to find a balance. Too much copper will waste material, while too little copper will reduce the efficiency and quality of the cable. Unfortunately, many cable manufacturers try to cut corners by using as little copper as possible. Most CCA cables use only 10% to 15% copper by weight. This means that only about 60-65% of the current flows through the copper in these cables. Our CCA cat6 and cat5e cables use 24% copper by weight (close to twice the amount of copper), guaranteeing performance for you without having to pay a high price.

    Find balance
    Our society is closely related to progress. Good ideas and solutions will continue to be replaced by better ideas and solutions, especially when dealing with multiple factors and variables. In our highly competitive and rapidly changing environment, you need to strike a balance between performance, cost and time. Sewell's high-quality CCA has more copper, has high performance and reliability, and reduces installation costs and time, which can help you find a balance.