Tips for selecting power cords

2023-05-25 20:02:40

Although the Power cord is small, its responsibility is significant. It not only directly affects the effectiveness and lifespan of household appliances, but also concerns the personal and property safety of users. Therefore, consumers must not take it lightly when choosing. However, there are a wide variety of power cord products on the market, and each appliance has its own characteristics. If ordinary consumers do not find the right way, they are easily picky.

The power cord should be selected according to different household appliances. Different household appliances use different power cords. Generally speaking, for integrated plug wires used in lighting fixtures, recorders, and televisions, it is recommended to choose RVB-70, RVZ-70 parallel or twisted pair cables with a cross-sectional area of 0.75-1.0 square meters. For power lines such as rice cookers, air conditioners, ventilation fans, electric fans, refrigerators, washing machines, etc., it is advisable to use RVZ-70 three core sheathed wires with a cross-sectional area of 0.75-1.5 square meters and a cross-sectional area of about 100W. For electrical appliances and mobile sockets with strong mobility and heat sources or electric sparks such as soldering chromium iron and hand drills, RHF wires with a cross-sectional area of 0.75-1.0 square meters should be selected. When burying concealed wires in a house, BV-70 PVC insulated copper wires should be used. Core hard wire with a cross-sectional area of 1.0-2.0 square meters to ensure a sufficiently long safe service life; For mobile socket connections used in damp environments such as kitchens and bathrooms, it is recommended to use RVZ-70 sheathed wires.

When purchasing wires, the first thing to consider is whether there is the "Great Wall logo" and production license number of the China Electrical Products Certification Committee on the packaging of the rolled wires;

Check if the outer plastic layer of the wire has a bright color and fine texture, and if ignited with a lighter, there should be no open flame. Non regular products using recycled plastic have a dull color, loose texture, and can ignite open flames; Next, let's look at the length and price. The length of each roll of BVV2 × 2.5 is 100 ± 5 meters, with a market price of around 280 yuan. Non regular products range in length from 60 to 80 meters, and some manufacturers make the E insulation outer layer thicker, making it difficult for experts to see the problem. Generally, the length can be roughly calculated by counting the number of turns of the wire and multiplying it by the radius of the entire roll. The price of this type of product is between 100 and 130 yuan; Secondly, you can request the merchant to cut a dead end and inspect the copper core material. The diameter of the 2 × 2.5 copper core is 1.784 millimeters, which can be measured with a micrometer. For regular products, fine red purple copper is used as the wire, with a bright and slightly soft outer layer. For non-standard products, the copper is slightly black and hard, belonging to recycled miscellaneous copper with high electrical resistivity and poor conductivity, which can cause heating and is unsafe; Finally, when purchasing electrical wires, you should go to a power store or the manufacturer's store.