What are the items to pay attention to in the purchase of wire and cable?
Many people should understand that the selection of wire and cable, looks simple, in fact, is closely related to personal safety and security at home. Due to the uneven scale of enterprises and production technology capacity, coupled with fierce market competition, the quality of wire and cable products on the market is uneven. The substandard quality of solar cable wire products may lead to electric shock casualties and fire accidents. At present, the cable manufacturers on the market are as messy as a cow's hair, there are formal, irregular, large manufacturers, small manufacturers, national standard, non standard. There are so many different kinds of things.
What should we pay attention to when choosing wire and cable? Red Flag Electrician summed up the following points for you:
1. Due to the uneven quality of wires and cables sold on the market, consumers should try to go to large malls, or dealers, etc. When choosing products, try to choose a certain well-known production enterprise. Such production enterprises have high technical force and manufacturing technology level, good reputation and high quality assurance; be sure to recognize all kinds of information about the product, including its length, specifications, operating voltage, manufacturer, contact information, etc., which should be clear in the decision planning purchase. Because the quality of wire and cable not only endangers the normal use of all, but also relates to the safety of their own lives. Thus, in order to avoid buying counterfeit inferior products, it is best to rely on reliable dealers to choose and buy, in order to protect the interest of itself to a greater extent.
2, consumers should buy products with the "CCC" logo. Because through the compulsory certification of the product, its raw materials and finished products have gone through the necessary inspection, the quality is relatively guaranteed. If you have any questions, you can also check the website of China Quality Certification Center or Certification and Accreditation Administration; because wire and cable products are national compulsory safety certification products, if there is no certification logo, they must be unqualified.
3, look at the product appearance: the surface layer of the inferior wire and cable sheath looks completely transparent, touch also feels crisp, and the good wire and cable sheath is soft and bright. The appearance of the wire should be smooth and flat, the insulation layer and sheath layer should have no obvious defects, no pores, no roughness, clear logo printing, and no greasy feeling when touching the wire. If possible, check the cross section of the wire, insulation and sheathing should be of a certain thickness, without severe eccentricity. Copper conductor surface should not be oxidized black, aluminum conductor surface should not be oxidized white. Tear the insulating layer or sheath by hand, there should be a certain toughness and scalability, not easy to break.
4, load capacity: the optional cable model must have enough load, otherwise when the wire load power supply, coupled with the hot weather, it is easy to fire. Waterproof ability: some cables and wires are buried underground. On rainy days, if the cable is damaged, it is easy to cause short circuits and leakages, which may cause casualties. Conductivity: In order to save cost, many people use copper containing magazines or scrap copper, which greatly reduces the electrical conductivity of the cable. Length: some bad businesses cheat, although there is a meter, but in the middle part, but less than 10 meters. It's also less noticeable to the user.
2, consumers should buy products with the "CCC" logo. Because through the compulsory certification of the product, its raw materials and finished products have gone through the necessary inspection, the quality is relatively guaranteed. If you have any questions, you can also check the website of China Quality Certification Center or Certification and Accreditation Administration; because wire and cable products are national compulsory safety certification products, if there is no certification logo, they must be unqualified.
3, look at the product appearance: the surface layer of the inferior wire and cable sheath looks completely transparent, touch also feels crisp, and the good wire and cable sheath is soft and bright. The appearance of the wire should be smooth and flat, the insulation layer and sheath layer should have no obvious defects, no pores, no roughness, clear logo printing, and no greasy feeling when touching the wire. If possible, check the cross section of the wire, insulation and sheathing should be of a certain thickness, without severe eccentricity. Copper conductor surface should not be oxidized black, aluminum conductor surface should not be oxidized white. Tear the insulating layer or sheath by hand, there should be a certain toughness and scalability, not easy to break.
4, load capacity: the optional cable model must have enough load, otherwise when the wire load power supply, coupled with the hot weather, it is easy to fire. Waterproof ability: some cables and wires are buried underground. On rainy days, if the cable is damaged, it is easy to cause short circuits and leakages, which may cause casualties. Conductivity: In order to save cost, many people use copper containing magazines or scrap copper, which greatly reduces the electrical conductivity of the cable. Length: some bad businesses cheat, although there is a meter, but in the middle part, but less than 10 meters. It's also less noticeable to the user.