Although the power cord is small, but the responsibility is great, not only directly related to the use effect and life of household appliances, but also related to the personal and property safety of the user, because the consumer must not be taken lightly when purchasing. However, there are a wide variety of power line products on the market, and each electrical appliance has its own characteristics. Ordinary consumers are easy to pick a blind eye if they are not allowed to do so.
Power cord should be selected according to different household appliances. Different household appliances use different power cords. Generally speaking, lights, radio, TV with integrated plug line, should choose RVB – 70, RVZ – 70 type parallel or twisted pair, the cross-sectional area should be 0.75-1.0 MM square meters rice cookers, air conditioner, air fan, electric fan, refrigerator, washing machine power line to choose RVZ-70 type three core with sheathed wire is appropriate, Its cross-sectional area should be 0.75 — 1.5 mmm square meters, 100W or so solder electric chromium iron, hand drill and other mobile strong and have heat source or electric spark electrical appliances and mobile socket, to choose RHF line is appropriate, the cross-sectional area should be 0.75 — 1.0 mmm square meters house, buried pipe dark line with BV – 70 type PVC insulated copper core hard wire, Its cross-sectional area is 1.0 — 2.0 mmm square meters to ensure a long enough safe service life; As for the application of mobile socket connection in the kitchen, toilet and other humid environment, it is appropriate to choose RVZ-70 sheath line.
If you buy a wire, first of all, see whether there is a “Great Wall logo” and production license number of China Electrical Products Certification Commission on the packaging of the wire.
See wire outer plastic skin is bright color, fine texture, should be lit with a lighter flame. Informal products use recycled plastics, dull color, loose texture, can ignite open flame; Second look at the length, compared to the price, BVV2×2.5 length of each volume is 100±5 meters, the market price is about 280 yuan, informal product length 60-80 meters, some manufacturers make the E insulation skin thick, so that experts also difficult to see the problem, generally can count the number of wire coil, and then multiplied by the radius of the whole volume, can roughly calculate the length, The price of this kind of product is between 100-130 yuan; Second, you can ask businesses to cut a severed head, see the copper core material. 2×2.5 copper core diameter 1.784 mm, can be measured by micrometer, regular products wire use fine red copper, the outer layer is bright and slightly soft, informal products copper black and hard, is a regenerative hybrid copper, high resistivity, poor conductivity, will heat up and unsafe; Finally, buy wire should go to the electricity store or manufacturer’s branch.