Identify the quality of power cord and the use of plug power cord

Power cord is the daily necessities in people's life and work, especially in home decoration, office and production lighting. The quality of power cord is safe and reliable. Due to aging of power lines and unreasonable equipment, fires frequently occur. It may be caused by low quality power cord. Therefore, consumers must carefully polish their eyes and identify when purchasing wires to prevent accidents.

The state requires the use of copper core insulated conductors in new residential, office and production lighting, but the same is true for copper conductors, but there are also low-quality copper conductors. Copper core is recycled copper, which contains a lot of impurities. The conductivity of some inferior copper conductors is even worse than that of iron wires, which is very easy to cause electrical accidents. At present, there are many wire brands in the market and the price is chaotic, which makes it difficult for consumers to choose. For the price of 2.5 mm2 and 4 mm2 copper core wires commonly used in home decoration, office and production lighting, due to the difference between manufacturers, the price difference of the same specification of power wire coil is 10% - 20% or even greater. As for quality and length, consumers are more difficult to determine.

Due to the different raw materials used in the production process, the price of power cord varies greatly. The main raw materials for the production of power lines are electrolytic copper, insulating materials and insulating sheath materials. At present, the price of electrolytic copper on the market is 49000 yuan/ton, and the price of recycled copper is only 33000 yuan/ton; The price of high-quality products of raw ecological thermal insulation materials and sheath materials is between 9000 yuan and 10000 yuan per ton, while the price of defective products or recycled products is only between 5000 yuan and 6000 yuan per ton, with a large price difference. In addition, the insufficient length and glue content of insulators are also the main reasons for the price difference. The length of wire in each roll of excellent products (national standard) is 100 meters ± 0.5 meters, that is, at least 99.5 meters in each roll, while the length of defective products is only 95 meters, which is called national standard, and some even up to 80 meters. After comparison, it is not difficult for consumers to see that the difference in the sales price of finished power lines is the difference in materials.

Use of plug power cord
1. When unplugging the power cord of the plug, manually unplug the power cord of the plug. Do not only pull the wire, causing the copper wire inside the wire to break. The power cord of the plug shall not be pressed under furniture or heavy objects to avoid damage and danger.
2. Pay attention not to bind when using; Because the power cord of the plug is difficult to dissipate heat after binding, the temperature rises and the plastic melts, resulting in a short circuit and fire of the copper wire.
3. The plug power cord should not be placed above the furnace. Due to the high temperature of the flame, the plastic will melt, resulting in short circuit and fire of the copper wire.
4. The plug power cord shall be used under the allowable load capacity, and the extension cord shall be connected. Multi-pore socket shall use products with leakage protection device or overload protection device.
5. The use of old or damaged plug power cord will cause short circuit, leakage or induced current and other hazards, and should be replaced immediately.
6. Is the plug power cord in use hot or smelly? This is an overload phenomenon. Stop using high-power electrical appliances immediately and notify professional electricians for inspection in time.
7. A simple algorithm to determine whether the plug power line is overloaded: the sum of the electrical power carried by the plug power line/the power supply voltage is the estimated current. Compared with the rated capacity of the socket, it should be less than the rated capacity of the socket.