How to distinguish good quality from bad wire?

The difference between wire and cable The method of finding the difference between wires found in the cable network 1. Wire: It is composed of one or several soft wires, covered with a light and soft sheath, and is used to carry the current of conductive metal wires. There are various forms such as solid, stranded or foil braided.

According to the insulation status, it is divided into two categories: bare wires and insulated wires. 2. Bare wires that do not contain any insulation or protective layer. In addition to being used as a conductor for the transmission of electrical energy and information, it can also be used to manufacture components and connecting wires for electrical appliances.

Generally, it is made of copper, aluminum, copper alloy, aluminum alloy and copper-clad steel, aluminum-clad steel and other composite metal materials. In addition to good electrical conductivity, bare wire also has certain mechanical properties, such as tensile strength, elongation, bending and torsional characteristics, creep resistance, wear resistance, etc. 3. Insulated wires, which are divided into magnet wires according to their uses

1.It depends. See if there is a quality system certification; See whether the certificate is standardized; See whether there is the factory name, factory address, inspection seal, and production date; See if there are trademarks, specifications, voltages, etc. printed on the wires.

Also look at the cross-section of the copper core of the wire, the color of the high-grade copper is bright, the color is soft, and the copper core is yellow and reddish, indicating that the quality of the copper used is better, and the white in the yellow is the reaction of low-quality copper. Otherwise, it is defective.

2.To try. You can take a wire head and bend it repeatedly by hand, where it feels soft, has good fatigue strength, plastic or rubber feels elastic and there is no crack on the wire insulator is the best product.

3.Intercept a section of insulation to see if the core is in the middle of the insulation. Not centered is due to the process is not high caused by the core phenomenon, in the use of small power can also be peaceful, once the power consumption, the thinner side is likely to be broken down by the current.

4.It is necessary to see whether the length and core thickness have been done with hands and feet. In the relevant standards, the error of the length of the wire can not exceed 5%, and the cross-sectional wire diameter can not exceed 0 02%, but there are a large number of short catties in the length of the market, and there is fraud on the cross-section (such as the line with a cross-section of 6 square millimeters, but in fact it is only 4 5 square millimeters thick).

In a simple way, the quality of the wire can be judged by the insulation! The rubber on the outside of the wire is the insulation layer of the wire. Its existence can not only prevent damage to the conductor caused by external factors (protection conductor), but also protect the external damage caused by the failure of the conductor (insulation, flame retardant).

To judge whether it is good or bad, the following three methods can generally be used:

1.Touch. Gently stroke the surface of the insulation layer with your hands, if the surface is rough, it proves that the production process of the insulation layer is poor, and it is easy to cause failures such as leakage.

If you press the insulation with your fingernails, if it can rebound quickly, it proves that the insulation layer has high thickness and good toughness.

2.Bend. Take a piece of wire, bend it back and forth several times, and then straighten the wire and observe.

If there are no traces on the surface of the wire, it proves that the wire has good toughness. If there is obvious indentation on the surface of the wire, severe whitishness, it proves that the toughness of the wire is poor. If buried in the ground for a long time, it is easy to age, brittle, and easy to leak electricity in the future.

3.Burn. Use a lighter to keep burning against the wire until it reaches the wire insulation**.

Then turn off the lighter and start the timer – if the wire can go off automatically within 5 seconds, it proves that the wire is flame retardant. Otherwise, it proves that the flame retardant capacity of the wire is not up to standard, and the circuit is overloaded or the circuit is easy to cause disasters.

It depends on whether there is a quality system certification; See whether the certificate is standardized; See whether there is the factory name, factory address, inspection seal, and production date; See if there are trademarks, specifications, voltages, etc. printed on the wires. It is also necessary to look at the cross-section of the copper core of the wire, the color of the high-grade copper is bright and the color is soft, otherwise it is a defective product.

To try. You can take a wire head and bend it repeatedly by hand, where it feels soft, has good fatigue strength, plastic or rubber feels elastic and there is no crack on the wire insulator is an excellent product.

Weighing. wires, which are generally within the specified weight range. For example, the commonly used plastic insulated single-strand copper core wire with a cross-sectional area of 1 5 mm2 weighs 1 8 1 9 kg per 100 m; 2 5 mm2 plastic insulated single-strand copper core wire, weighing 2 8 3 0 kg per 100 m; 4 0 mm2 plastic insulated single-strand copper core wire, weighing 4 1 4 2 kg per 100 m, etc.

Poor quality wires are not weighted enough, either the length of the pin is not enough, or the copper core of the wire has too many impurities.

Look at the copper. Qualified copper core wire copper core should be purple-red, shiny, and soft to the touch. The shoddy copper core is purple-black, yellowish or white, with many impurities, poor mechanical strength, poor toughness, and a little force will break the world, and there is often a broken wire in the wire.

When inspecting, you only need to peel off one end of the wire 2 cm, and then use a piece of white paper to rub it slightly on the copper core, if there is a black substance on the white paper, it means that there are more impurities in the copper core. In addition, the insulation layer of shoddy wires may seem to be very thick, but in fact most of them are made of recycled plastic, and over time, the insulation layer will deteriorate and leak.

See**. Due to the low production cost of counterfeit and shoddy electric spring bucket limb wire, therefore, when sellers, they often sell at low prices under the guise of low prices and good quality, so that people are deceived.

1. Judge by weight. Good wire products, the weight is relatively uniform, that is, in a state of this fixed range. If the cross-sectional area of the line is flat, the weight of 100 meters is about kilograms.

A flat wire weighs about kilograms for 100 meters. For example, if the weight of 4 flat wires is about 100 meters, on the contrary, if the weight of the wire is insufficient, it means that the length is insufficient, and the impurity content may be too much.

2. Observe the quality of the conductor. Metal conductors are an important cost for wires, so some manufacturers will cut corners in this regard. A good wire uses a good copper core, which is purple-red, and the traces of defeat are bright and soft.

On the contrary, if the core of the wire is purple and black, yellowish, it is said that there are many impurities, the strength is insufficient, and it is easy to break if it is broken.

3. Observe product information. Then you can distinguish from the packaging of the wire, the good wire packaging is perfect, and the packaging has detailed product information. Such as the name of the manufacturer, the date of production, product specifications, trademark and voltage and other information, and the handwriting is legible.

On the contrary, if the wire is packaged casually and the product information is less, it is judged to be an inferior wire.

4. Observe the eccentricity of the wire. You can cut a section of the wire to see if the wire core is centered, a good wire core is centered, on the contrary, if the wire is eccentric, it means that the production level is low, once the power consumption is large, the thin surface is easy to breakdown.

5. The length of the wire and the thickness of the core. Finally, it is judged from the length of the wire and the thickness of the wire diameter. Good wire length and wire diameter are in line with national standards.

The length difference is not more than 2%, and the cross-section error is not more than 2%. On the contrary, if the wire package shows 100 meters, squared, and the actual measurement is only 90 meters, 2 square, it means that it is an inferior wire.

1. Look at its surface, when the bridge lease does not dismantle the wire, it is necessary to see whether the outer packaging has a complete certificate, and there should be no damage, dirt, blurring and other problems on the certificate, and the certificate should include complete information such as specifications, implementation scale, rated voltage, length, date, factory name and address, etc., to confirm whether there is a "CCC" and production license number of China's national compulsory product certification, and a quality system certification fraud book. Also make sure that the wires are printed with trademarks, specifications, voltages, etc.

2. Check the amount, after the packaging is removed, check the size of the wire, the length error should be less than or equal to 2%, and the cross-section line diameter error should be less than or equal to. For example, the most commonly used square wire in the family, the diameter standard of the core is: Inferior wires are often short of pounds or diameters that do not meet the standards.

3. Try to see the color of the copper core in the wire, the color of the inferior copper core wire will be purple, yellow or white, because it contains more impurities, and the qualified copper core wire should be purple red, shiny and soft.

First, look at production capacityThe production capacity of a wire manufacturer includes production technology, production equipment, processing team quality, etc. A wire processing plant with strong production capacity, even if there are good raw materials, if the technology is not advanced enough, the processing equipment is not in place, and the construction personnel are not in place, it is very difficult to produce high-quality wires.

Second, look at the quality of the productProduct is the foundation of an enterprise, and it is also the key for an enterprise to gain a foothold in the market. In this day and age, it is very easy to apply for or set up a processing plant, as long as there is enough money for chain culture. But if you don't have a good product, it's not easy to get a foothold in the market.

Therefore, the quality of wire products is also one of the factors to judge the quality of a cable shed wire production plant.

Third, look at after-sales serviceIn addition to providing consumers with qualified products, regular wire and cable factories can also provide consumers with supporting after-sales service. This is especially true in an era where everyone is all about "user experience".