In the choice of cable according to their own use t […]
In the choice of cable according to their own use to choose the cable, do not seek cheap. That the cable is cheap and can guarantee that the national standard, in all likelihood are playing the edge of the ball. Huyou is not professional do not understand the industry users. So that the majority of users can more clearly understand the quality of cable and self-judgment of the national standard and non-standard differences. Here we combine engineering users and cable industry often encounter the actual situation, so that we do a simple understanding.
Cable in the engineering users and construction projects in the use of these three kinds of cables are mainly:
1, the national standard cable: According to the relevant national standards issued by the cable technology produced by the cable referred to as international lines.
2, line standard cable: According to industry standards, mainly have less jerry-building, but does not affect the use of large performance.
3, non-standard cable: to meet the needs of the city should be born pregnant products. Today, the application of wire and cable more and more widely, then, the market sales of wire and cable types are more and more.
So, how to distinguish between the wire and cable "GB" and "non-standard" it?
I suggest you a look, two tests, three weighing, four than the price, five to see copper, six quality testing, six strokes see the outcome.
Look at the wire and cable products to see whether the quality system certification, to see whether the certificate is standardized, to see whether the factory name, site, inspection chapter, production date, see the wire printed on the trademark, specifications, voltage and so on. But also look at the cross section of the copper wire, excellent copper color bright, soft color, otherwise it is defective.
Second try: take a wire head repeatedly bent by hand, all feel soft, good anti-fatigue strength, plastic or rubber feel flexible and no wire insulator on the cracks, is the superior product.
Three weighing: good quality wire and cable, generally every 100m weight in the specified weight range. Such as the commonly used cross-sectional area of 1.5mm2 plastic insulated single strand copper core, per 100m weight of 1.8-1.9kg; 2.5mm2 plastic insulated single strand copper wire, every 100m weight of 3-3.1kg; 4.0mm2 plastic Insulated single strand copper wire, per 100m weight of 4.4-4.6kg and so on. Poor quality of the lack of wire, or the length is not enough, or too much copper wire impurities. If the cable, especially the large size of the cable, said the weight of the soil is the best way to reflect the cable is the amount of copper standards and conductor cross-section is the most simple way, generally have a small cross-section of the cable, if the cable Copper content by weighing less than the provisions of the state to allow the error within the weight range, the basic can be identified as non-standard.
Four than the price: the production of fake and shoddy wires because of the low cost, therefore, traders in the sale, often cheap for the guise of low-cost sales, people fooled. Therefore, when buying, be careful, do not advertised for the business of "inexpensive" dazzled, and finally deceived. Five look at copper. Qualified copper wire copper core should be purple, shiny, feel soft.
Five to see copper material: shoddy copper wire copper core for the purple black, yellow or partial white, impurities and more mechanical strength, poor toughness, a little hard will break, and the cable often broken phenomenon. Check, you just peel the wire a section of a child, and then use a piece of white paper in the copper core on a little rub about, if the white paper with black material, indicating more impurities in the copper core, can be identified as "non-standard "Wire and Cable.
Six quality inspection: in the case of cable quality differences, can be sent to third-party testing agencies for testing. To the authority of the test report is qualified as the basis.