Recently, Wang Zhiqiang, a senior engineer of the Ninth Design Institute of China Shipbuilding Industry, said at a seminar held by the Development and Research Center of the State Council, "In the case of high reliability and safety requirements, copper cables must be used instead of Aluminum cable.” Because of the different thermal expansion coefficients of copper and aluminum metal, the aluminum cable joint is prone to fire. The probability of fire is about 10 times that of copper cable. Therefore, aluminum cable can only be used in areas with high construction management level such as North America.

Due to the different thermal expansion coefficients of copper-aluminum metal, the aluminum cable joint is prone to fire - the probability of fire is about 10 times that of copper cable.

Wang Houyu, a well-known industrial and civil construction electrical technology expert, revealed that in the past, when copper resources were tight, only important departments used copper cables. At the same time, aluminum-based copper was written into electrical specifications, resulting in frequent electrical fires.

Since the reform and opening up, China's power cable industry has gradually restored a "copper-based" rational structure, and the proportion of aluminum cable market has dropped from 40% to about 10%. However, in recent years, due to the exaggerated propaganda of aluminum and aluminum alloy cables by individual aluminum alloy cable manufacturers and the media, the chaos in the industry has become prominent, and even the misleading slogan “Aluminum to copper” has appeared. In addition, in the case of overcapacity in China's cable industry, blindly promoting aluminum cables to replace copper cables is bound to cause a large number of copper cable equipment to be idle, and the original investment is wasted, and the output value of the entire industry has shrunk dramatically.

Therefore, the experts at the meeting believe that there are many chaos in the aluminum cable-cable copper cable in China's power cable industry, which is misleading to the market order. It is urgent to evaluate and judge from the aspects of technology, safety and economy, and give full play to the market in the field of power cable copper and aluminum. The decisive role played in resource allocation.