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Discussion on small specification aluminum alloy Non-sheathed fixed wiring products

by:AAA     2020-03-13
The 8000 series aluminum alloy cables have been vigorously promoted by the industry, and their advantages have been widely recognized by the vast number of users and design units. Cable enterprises have also been launched one after another, which is very likely to sweep across the country. What's more, aluminum alloy Non-sheathed fixed wiring has been introduced, with specifications ranging from 1. 0mm2 to 630mm2, covering GB/T 5023. 3-All specifications of 2008. The main market for fixed wiring is interior decoration. Among copper core fixed wiring products, the most widely used specification is 1. 5mm2- 6mm2, if aluminum alloy fixed wiring replaces copper core fixed wiring, its corresponding specification is 2. 5mm2-10mm2. Aluminum Alloy fixed wiring from the economy and installation of products (Light weight) Compared with copper core fixed wiring, it has incomparable advantages, but its pipe threading performance and connection performance are worth discussing. After all, cables need to be put into actual use after laying. The aperture of electrical wiring port for indoor decoration electricity is generally not more than 4mm, while the outer diameter of conductor for 10mm2 aluminum alloy wiring is more than or close to 4mm, which is difficult in practical application. Moreover, the bending radius of 10mm2 aluminum alloy wiring needs to reach 40mm (Calculated by 7 times outer diameter) This cannot be used in a narrow electrical space. Therefore, in interior decoration, 10mm2 aluminum alloy wiring is still difficult to use in practice, regardless of its pipe threading, or the spaciousness required for electrical joints and bending. For 2. 5mm2- Although 6mm2 aluminum alloy wiring does not have difficulties in pipe threading and bending space like 10mm2 aluminum alloy wiring, there are also problems in connection. Indoor electrical appliances are mainly televisions, refrigerators, washing machines, electric cookers, electric lights, air conditioners, etc. , and these electrical appliances are connected to the wiring through switches, sockets or electrical contactors. The common feature of these component products is that the wiring mode of their wires is Jack type or ring buckle Bolt compaction, and the contact parts between these component products and wires are non-aluminum or aluminum alloy metals such as copper and tinned copper. If the aluminum alloy cloth wire is connected to these parts, it must adopt the above-mentioned wiring method and have to contact with the metal of non-aluminum or aluminum alloy. At present, there is no such small-sized copper-aluminum transition terminal, and even if there is, no one is willing to use it in the construction of the home improvement market (The construction volume increases and the construction is complicated). This is easy to cause the transition resistance of the contact part to increase obviously, and the heat will cause failure. At the same time, it will inevitably cause the occurrence of electrochemical corrosion reaction. In heat and air, the occurrence of electrochemical corrosion is accelerated. We should remember that China's aluminum core cloth wire has been widely used, not its wire itself has quality problems, the key is its contact and connection with components. Therefore, the small-size fixed wiring applied to interior decoration needs to be matched and adapted to the design of threading pipes, wiring methods and electrical contact parts, or through further transformation of aluminum alloy fixed wiring, make it adapt to the current environment of indoor electrical appliances. In this way, it is beneficial for the promotion and use of small-sized aluminum alloy fixed wiring, otherwise, it should not be easy to cover up the subsequent safety hazards only with economic benefits.
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