How to identify real copper wire? Fire burning method to identify real and fake copper wire How to i

People build new houses, decorate houses need to buy copper wire, now the market is mixed with many people to buy fake copper wire, the following is a few ways to make you quickly identify inferior copper wire, tools.

Lighters, weighing, and your discerning eyes.

Method. Look at the trademark, manufacturer and other information, regular manufacturers have registered trademarks recognized by the state, and there is a R logo in the circle in the upper right corner, and three C certification.

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Looking at the outer skin, the regular copper single-core wire and multi-core wire insulation skin are very uniform, the copper wire is in the center of the insulation skin, and the inferior one is uneven, and the conductor is on the side.

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Look at the copper color, peel off the insulating skin, look at the color, the good copper wire is purple-red, shiny, soft to the touch, the inferior wire is yellow or dark, the copper strip is stiff and impurities, and it is <>

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Take the fire, for the multi-core flexible wire, a lot of copper-clad aluminum, the appearance of this wire is the same as the copper wire, the touch is also soft, ordinary people can not distinguish at all, then the lighter comes in handy, peel off the insulating skin and burn on the flame, the appearance of the real copper wire remains unchanged, the aluminum quickly melts, into a round small aluminum droplet, very obvious.

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Weighing, the appearance has been checked, on the weighing, the national standard of wire diameter and weight hardware manual, here is not listed one by one, after the above steps, you can have a sharp eye, you will be able to buy qualified wire.

Judging from the color of copper, copper is divided into brass and red copper. Suck it up with a magnet close to the copper wire, and you'll know. If it can be absorbed, it means that it is fake, and the iron content is relatively high, and if it is not absorbed, it means that it is a real copper wire.

How to identify copper wire.

Here's how to identify copper wires:

1. A good copper wire is yellow-brown, relatively soft, the wire is not too thin, and it is folded by hand after the strands are combined, and the elasticity is small.

2. There are many dopings in the bad copper wire, and it is as hard as iron wire when folded by hand.

3. The aluminum wire is wrapped with a layer of copper water, and the refurbished wire is jet black, and it will be broken when the wire is stretched by hand.

The most common identification method is to identify by the naked eye, the lacquered can be scratched open to distinguish the patent leather, the copper is not magnetic, and some can also be added to the identification with magnets.

It must be based on physical identification.

How do you distinguish between good and bad when buying wires?

Certificates; 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, and the high-grade copper.

The color is bright and soft, and the copper core is yellow and reddish, indicating that the copper used is of good quality, while the yellow and white are a reflection of low-quality copper.

2) You can take a wire head and bend it repeatedly by hand, where it feels soft, has good fatigue strength, has a large elasticity of plastic or rubber and is insulator of the wire.

If there is no crack on it, it is a superior product. The outer plastic skin of the wire should be bright in color and fine in texture, and there should be no open flame when lit with a lighter.

3) Intercept a section of the insulation layer to see if its core is located in the middle of the insulation layer. 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) Be sure to see if the length and core thickness have been done. In the relevant standards, it is stipulated that the error of the length of the wire cannot exceed 5%, and the cross-section wire diameter cannot be exceeded, but there are a large number of short catties in the length and fraud on the cross-section (such as indicating that the cross-section is a square millimeter.

of the line, in fact, only 2 square millimeters).

The method of judging the authenticity of copper wire can be judged by using the different melting points of the fake copper wire of copper and copper-clad aluminum, and the method of fire can be used to judge that copper-clad aluminum will melt quickly with a lighter, and pure copper will become red without melting, so as to distinguish pure copper from copper-clad aluminum.

1 magnet, 2 cut a section, look at the color of the line, 3 look at the weight.

It can be judged from the gloss, color, wire diameter and softness of the copper wire.

The copper wire is made of pure copper, the color is red, the appearance is bright, and the feel is soft. It is also possible to measure the wire diameter to match the nominal value.

On the contrary, inferior products are often yellowish in color, rough in appearance or oxidized and black, and dull in color because they are not pure copper. When bent by hand, it is elastic and stiff. Often, the wire size does not reach the nominal value.

The color of the wire core of inferior copper is dark, the silk ratio is small, the feel is not soft and brittle, and it is easy to be wound.

If only you knew the owner of that store, he would tell you the truth! Sometimes it's a check of the resistance to weigh it. There is also the amount of length. Measure the diameter. Compare prices. Generally, I go to buy a factory shop to buy...

Inferior copper wire generally has several characteristics, one is that the core area is less than the national standard, the cross-sectional area of a few cores or a single core is small, the second is high eccentricity, and the third is the poor resistivity.

To identify the inferior wires on the same table, I think you should be able to look at its material, or you can use other things, so that you can better identify its quality.

1. The method of identifying copper wire by fire is not scientific.

2. Visual identification: the surface color of a good copper wire is dark red copper, and the surface of the second copper wire is divided into two situations: one is blackened and has an obvious oxide layer; The other is lighter in color and noticeably yellowish.

These are wires made of recycled copper that contain impurities. Strength identification: There are scars on the bare wire (an electric knife scratch about a deep trace) repeatedly bending, a good copper wire than the second copper wire first makes the hand feel warm, and the second copper wire must be broken first.