Household appliances are essential in the home. In recent years, with the development and widespread adoption of home appliances, household electricity consumption has increased rapidly. To ensure safe household electricity use, everyone should understand the following common sense when purchasing and using electrical wiring.
1. Plastic copper wire. The letter B represents the wiring, the letter V represents the insulating material (PVC), and the letter 4 represents the conductor cross-sectional area of 4 square millimeters. Therefore, 4 square wire represents PVC insulated wiring. The cross-sectional area of commonly used BV wire ranges from 0.5 to 185. A larger cross-sectional area reduces the conductor's resistance and allows for greater current flow. Of course, if the environment or other reasons require more stringent wiring requirements, environmentally friendly wire (insulation material with minimal environmental impact), flame-retardant, or fire-resistant wire (resistant to 70-105 degrees Celsius) can also be used.
2. Jacketed cable. The letter R stands for soft, the first letter V stands for PVC as the insulation material, and the second letter V stands for PVC as the sheath insulation material. 3 stands for three-core conductor, and 2.5 stands for a single-core conductor with a cross-sectional area of 2.5 square millimeters. This means a PVC-insulated, PVC-sheathed, three-core, 2.5 square millimeter flexible cable. Jacketed cable is primarily used for electrical appliances, instruments, and electronic equipment, as well as power cables, control cables, and signal transmission lines. The number of cores ranges from 2 to 5, and the cross-sectional area of a single-core conductor ranges from 0.12 to 6.
BV Wire
BV Wire
There are many types of wire on the market, so it's important to choose the right wire based on your power load. Some wires are cheap, while others are expensive. Some people tend to choose the cheaper option first. However, he says, cheap wire often doesn't meet performance standards. Buying such wire could expose you to numerous safety risks. The manufacturing process for the wire isn't very technically demanding, and the raw materials don't vary significantly. If it's too cheap, the material isn't inferior, or the cross-sectional area isn't large enough.
Several Ways to Identify Practical Wire
1. Look at the packaging. Wires that are neatly shaped, well-packaged, and have all the necessary information (trademark, manufacturer name, address, phone number, specifications, cross-section, inspector, etc.) clearly printed on the certificate are generally produced by major manufacturers, most of which comply with relevant national standards, indicating reliable quality.
2. Compare the wire cores. Open the packaging and briefly inspect the core inside. Compare wire cores from different brands with the same nominal value. If one of the two wires is noticeably thicker, the thicker the sheath is, the less reliable it is. Tighten the sheath to a hard, generally national standard, and it won't tear easily.
3. Use fire. After the insulation material ignites, remove the fire source and extinguish it within 5 seconds. If it has some flame retardancy, it should be a national standard wire.
4. Examine the inner core. The brighter and softer the inner core (copper), the better the copper. National standards require the inner core to be made of pure copper.
5. Check the printed circuit board. Regulations stipulate that the product line must be printed with relevant markings, such as the product model and company name, and the spacing between markings must not exceed 50 cm. Clearly printed, symmetrically spaced markings indicate national standard wire produced by a major manufacturer.
The above information is part of today's article on common knowledge about wires and purchasing considerations.
