What is the difference between national standard wire and non standard wire, and what is the differe

The key is that the cross-sectional area of the copper core of the national standard wire is the same as that of the nominal one. The cross-sectional area of the copper core of the non-national standard wire cannot be reached. Of course, the price difference is much better.

1. Look. 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. 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.

2. 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.

3. 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 is weighted per 100m; plastic insulated single-strand copper core wire, weighing 3 per 100m; The weight of plastic insulated single-strand copper core wire is equal per 100m.

Poor quality wires are not of sufficient weight, either not long enough, or there are too many impurities in the copper core of the wire.

4. Than**. Due to the low production cost of counterfeit and shoddy wires, when sellers sell, they often sell at low prices under the guise of low prices and good quality, so that people are deceived.

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

When checking, you only need to peel off the wire at one end by 2cm, 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.

The master will explain the difference between the national standard line and the non-national standard line.

1. Wire length.

The allowable length error of the national standard is within the range, and the difference between the marked length of the non-standard wire and the actual length is at least 15m.

2. Uniformity of insulation and thickness of sheath.

If the thickness is uniform, it is the national standard, and if the thickness is uneven, the eccentricity is large, it is non-standard.

3. The color and gloss of the conductor copper core.

The copper core of the national standard is purple-red and has good gloss, while the copper core of the non-standard is yellow with a black surface and a dull gloss.

4. The purity and resistance of the conductor copper wire.

The national standard is pure copper and has low resistance, while non-standard copper contains many impurities, large resistance and high power consumption.

The national standard wire is the wire that is produced in full accordance with the national standard. Generally, household and common wires are in line with the standard specifications and performance, and the national standard stipulates five common specifications and performance.

1. The appearance is standard, there must be a certification mark, manufacturer, wire diameter, etc. on the wire, and the ground wire is insulated with a yellow-green layer.

2. Mechanical strength.

3. The insulation (generally greater than 100m) and voltage strength of the sheath (1500V below 500V).

4. Line resistance (no greater than a certain resistance under a certain wire diameter, conductivity and length).

5. Under the high temperature impact of 150 degrees, the wire shall not crack at the low temperature of -30 degrees.

As we all know, there is a certain standard for the production of everything, and of course wires are no exception. So the question is, what is the difference between the national standard and the non-standard wire? Let's take a look.

The length of each roll of the national standard wire is about 100 meters, and the error does not exceed one meter, which is completely produced in accordance with the national standard, with a soft feel and a shiny copper core. The length of each roll of non-standard wire is only 60-75 meters, which does not belong to the national standard factory, and cannot be used for specific purposes.

How to choose a wire material.

1. Look. To buy wire materials, you must choose national standard products, you can check whether the product has a quality system certification, see whether its certificate is standardized, etc., but also to see whether there is a printed trademark, specification, voltage, etc. on the wire, in addition to the wire copper core cross-section to judge, high-quality copper core wire is copper color, bright and soft color.

2. Try. When purchasing wire materials, you can take a wire and bend it repeatedly by hand at the joint, and if there is no damage, it means that it is a high-quality product.

3. Weighing.

Generally, the weight of the wire will be within the specified range, for example, the square plastic insulated single-strand copper core wire, the weight of 100 meters is in kilograms, if it is a square plastic insulated single-strand copper core wire, the weight of the 100-meter wire is in kilograms.

Summary: The above is about the difference between the national standard and the non-standard of wires, and how to choose the introduction of wire materials, I hope that the content shared can have some reference for you, if you want to know more about relevant information, you can **** Qijia information.