Recently, Wang Zhiqiang, a senior engineer at the Ninth Design and Research Institute of China Shipbuilding Industry, stated at a research seminar held by the Institute of Environmental Protection of the Development Research Center of the State Council that "copper cables must be used instead of aluminum cables in situations where high reliability and safety are required." Due to the different thermal expansion coefficients of copper and aluminum metals, aluminum cable joints are prone to catching fire - the probability of catching fire is about 10 times that of copper cables. Therefore, aluminum cables can only be used in areas with higher construction management levels such as North America.

Due to the different thermal expansion coefficients of copper and aluminum metals, aluminum cable joints are prone to catching fire - the probability of catching fire is about 10 times that of copper cables

Famous industrial and civil building electrical technology expert Wang Houyu revealed that in the past, when copper resources were scarce, only important departments used copper cables. At the same time, replacing copper with aluminum was written into electrical specifications, resulting in a higher incidence of electrical fires.

Since the reform and opening up, China's power cable industry has gradually restored a reasonable structure dominated by copper, and the market share of aluminum cables has decreased from 40% to around 10%. However, in recent years, due to the exaggerated promotion of aluminum and aluminum alloy cables by individual aluminum alloy cable manufacturing companies and media, chaos has become prominent in the industry, and even misleading slogans such as "replacing copper with aluminum" have emerged. In addition, in the context of overcapacity in China's cable industry, blindly promoting the replacement of copper cables with aluminum cables will inevitably result in a large number of idle copper cable equipment, waste of existing investments, and a significant reduction in the industry's output value.

Therefore, attending experts believe that there are many irregularities in China's power cable industry where aluminum cables replace copper cables, which seriously misleads the market order. It is urgent to conduct rational evaluation and judgment from the aspects of technology, safety, and economy, and fully play the decisive role of the market in the allocation of copper and aluminum resources in the power cable field.

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