Cables and wires are generally used in the use of engineering users and construction projects:
1. National standard cable: The cable produced according to the relevant cable standard technology issued by the country is abbreviated as international line.
2. Line Labeling: According to industry standards, there is mainly less cutting and cutting, but it does not affect the large performance.
3, non-standard cable: to adapt to market demand should be born of the product. Nowadays, the application of Wire and cable is more and more extensive. Along with it, there are more and more types of wires and cables sold on the market.
When selecting a cable, select the cable according to your site usage, and do not try to be cheap. It is thought that the cable is cheap and can guarantee the national standard. In all likelihood, it is a penalty. Flicker is not professional and does not understand the users of the industry. In order to allow users to more clearly understand the quality standards of cable and wire and self-judge the difference between national and non-standard. Below we combine the actual situation encountered by engineering users and cable industry, let everyone make a simple understanding.
So, how to distinguish between "national standard" and "non-standard" of wire and cable?
It is recommended that you look at it, test it out for the second time, try it out with three weights, compare it with the price of four, and look at the quality of the brass.
A look: to see whether the wire and cable products quality system certification, see whether the certificate is standardized, see if the factory name, site, inspection seal, production date, see if the wire is printed with trademarks, specifications, voltage and so on. Also look at the cross section of the wire copper core, superior product copper color bright, soft color, otherwise it is defective.
Second test: It is desirable to repeatedly bend a wire head by hand. Any product that has soft touch, good anti-fatigue strength, high elasticity of plastic or rubber feel, and no cracks on the wire insulator is superior.
Three weighs: good quality wire and cable, generally within the specified weight range per 100m weight. For example, a commonly used plastic insulated single strand copper core wire with a cross-sectional area of ​​1.5mm2 is 1.8-1.9kg per 100m; 2.5mm2 plastic insulated single stranded copper wire is 3-3.1kg per 100m; 4.0mm2 plastic Insulated single-stranded copper wire weight is 4.4-4.6kg per 100m. Poor quality wires have insufficient weight or are either of insufficient length or have too many impurities in the wire copper core. If it is a cable, especially a large-size cable, the method of weighing the soil is the easiest way to show whether the cable contains copper or not, and the conductor cross-section is the easiest way. Generally, there is stealing copper as a cable with a small cross-section if the cable is The weight of copper can not be within the range of the weight allowed by the national regulations, and it can basically be considered as non-standard.
Four-price ratio: Because of the low production cost of counterfeit and shoddy wires, when selling, traders often sell at a low price for good value, which makes people gullible. Therefore, when buying, be careful not to dazzle your mind for the “high quality and low price†advertised by the business and finally be deceived. Five to see the copper. Qualified copper core wire copper core should be purple, shiny and soft to the touch.
Five to see the copper material: shoddy copper core copper core is purple black, yellow or white, impurities, mechanical strength, poor toughness, that will break off a little force, and often within the wire disconnection phenomenon. In the inspection, you just strip the wire for a while and then use a piece of white paper to make a slight twist on the copper core. If there is black material on the white paper, it means that there are more impurities in the copper core and you can identify it as "non-standard. "Wire and Cable.
Six quality inspection: In the case of disagreement on the quality of the cable, it can be sent to a third-party testing agency for testing. The authoritative test report is based on whether or not it is qualified.
1. National standard cable: The cable produced according to the relevant cable standard technology issued by the country is abbreviated as international line.
2. Line Labeling: According to industry standards, there is mainly less cutting and cutting, but it does not affect the large performance.
3, non-standard cable: to adapt to market demand should be born of the product. Nowadays, the application of Wire and cable is more and more extensive. Along with it, there are more and more types of wires and cables sold on the market.
When selecting a cable, select the cable according to your site usage, and do not try to be cheap. It is thought that the cable is cheap and can guarantee the national standard. In all likelihood, it is a penalty. Flicker is not professional and does not understand the users of the industry. In order to allow users to more clearly understand the quality standards of cable and wire and self-judge the difference between national and non-standard. Below we combine the actual situation encountered by engineering users and cable industry, let everyone make a simple understanding.
So, how to distinguish between "national standard" and "non-standard" of wire and cable?
It is recommended that you look at it, test it out for the second time, try it out with three weights, compare it with the price of four, and look at the quality of the brass.
A look: to see whether the wire and cable products quality system certification, see whether the certificate is standardized, see if the factory name, site, inspection seal, production date, see if the wire is printed with trademarks, specifications, voltage and so on. Also look at the cross section of the wire copper core, superior product copper color bright, soft color, otherwise it is defective.
Second test: It is desirable to repeatedly bend a wire head by hand. Any product that has soft touch, good anti-fatigue strength, high elasticity of plastic or rubber feel, and no cracks on the wire insulator is superior.
Three weighs: good quality wire and cable, generally within the specified weight range per 100m weight. For example, a commonly used plastic insulated single strand copper core wire with a cross-sectional area of ​​1.5mm2 is 1.8-1.9kg per 100m; 2.5mm2 plastic insulated single stranded copper wire is 3-3.1kg per 100m; 4.0mm2 plastic Insulated single-stranded copper wire weight is 4.4-4.6kg per 100m. Poor quality wires have insufficient weight or are either of insufficient length or have too many impurities in the wire copper core. If it is a cable, especially a large-size cable, the method of weighing the soil is the easiest way to show whether the cable contains copper or not, and the conductor cross-section is the easiest way. Generally, there is stealing copper as a cable with a small cross-section if the cable is The weight of copper can not be within the range of the weight allowed by the national regulations, and it can basically be considered as non-standard.
Four-price ratio: Because of the low production cost of counterfeit and shoddy wires, when selling, traders often sell at a low price for good value, which makes people gullible. Therefore, when buying, be careful not to dazzle your mind for the “high quality and low price†advertised by the business and finally be deceived. Five to see the copper. Qualified copper core wire copper core should be purple, shiny and soft to the touch.
Five to see the copper material: shoddy copper core copper core is purple black, yellow or white, impurities, mechanical strength, poor toughness, that will break off a little force, and often within the wire disconnection phenomenon. In the inspection, you just strip the wire for a while and then use a piece of white paper to make a slight twist on the copper core. If there is black material on the white paper, it means that there are more impurities in the copper core and you can identify it as "non-standard. "Wire and Cable.
Six quality inspection: In the case of disagreement on the quality of the cable, it can be sent to a third-party testing agency for testing. The authoritative test report is based on whether or not it is qualified.
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