Nowadays, the application of 400A plugs is more and more extensive. However, in the industry field where 400A plugs are applied, the requirements for 400A plugs are relatively high. Generally, 400A plugs are required to have sufficient mechanical strength, can adapt to various high-intensity working environments, and will not change under the influence of some external forces. In addition, 400A plugs are also very strict in material selection during production, and all of them should have very good insulation performance and high temperature resistance. The power socket has one or more seats into which circuit wiring can be inserted, through which various wiring can be inserted to facilitate connection with other circuits. Industrial plugs are suitable for industry, generally divided into 3-core, 4-core, 5-core, etc. The current is generally divided into 16A, 32A, 63A, 125A, 250A, 420A, etc., and the protection level can be divided into IP44 and IP67, which are relatively conventional. Generally, it is used with industrial sockets and industrial connectors. A socket into which one or more circuit wiring can be inserted, through which various wiring can be inserted to facilitate connection with other circuits. Otherwise, in some high-temperature industries, if the 400A plug does not have the ability to work continuously and stably at high temperature, it will gradually become soft, and the corresponding mechanical strength will decrease, which will affect the normal operation of the 400A plug, and in severe cases, some dangerous situations will occur. Therefore, we must pay attention when purchasing 400A plugs. Let me tell you some ways to purchase 400A plugs.First of all, when purchasing 400a plugs, you must choose some regular major supermarkets, electrical city and other professional sales points. The 400a plug brand you have chosen is also some famous 400a plug brands, because the processing technology of 400a plug is very fine in the production process. Generally, some large 400a plug manufacturers only have relatively high-quality 400a plug production technology. Therefore, the brand-name 400a plug product is not only high in performance, but also safer in use. This purchase can ensure the subsequent safe and stable use of 400a plug.The second is to check the marks on some 400A plugs. The marks on 400A plugs must be clearly visible, so that they can be certified by national professional components. In China, CCC marks are generally used, so we need to see these marks to make sure that this 400A plug is a genuine product and can be used safely. In addition, some inspection reports and files are also very important and need to be confirmed.Third, some simple plug-in experiments can be conducted when choosing 400a plug. The plug should be kept open in the process of inserting and pulling out, and there will be no looseness or over-tightening, which is unreasonable. It is easy to have plug problems in daily use, causing instability of electrical equipment and endangering the operation of the whole plug and socket. Therefore, when purchasing and testing, some troubles in future use can be greatly avoided.Finally, don't choose some manually modified 400a plugs. The shape of the 400a plugs is fixed, and the shape of the plugs can't be changed manually, which is very unsafe. Using this modified 400a plugs is prone to high-voltage breakdown and other situations, and there are some very dangerous situations, such as slight damage to equipment, property loss and even personal injury in severe cases. In addition, in the process of using 400a plug, once the temperature is too high or even electromagnetic spark occurs, we need to stop the machine in time to replace the product to ensure our normal power supply safety.