In the choice of cable according to their own use of the site to choose the cable, do not covet cheap. That is cheap and can ensure the cable GB, nine out of ten are walking a fine line. Flicker is not professional do not understand the industry users. In order to enable users to more clearly understand the quality standards of cable and wire and the distinction between the national standard and non-standard. Below we combined with the actual situation of engineering users and cable industry often encountered, so that we do a simple understanding.
Cables and wires are commonly used in engineering and construction projects, mainly in the presence of these 3 cables:
1, GB cable: according to the relevant national cable standards issued by the technology of the cable production line.
2, standard: according to the industry standard, the main cable is Jerry have less, but does not affect the performance of the.
3, non-standard cable: in order to adapt to the needs of the market should be pregnant products. Today, the application of wire and cable is more and more widely, with the sales of wire and cable types are also increasing.
So, how to distinguish between the wire and cable "GB" and "non-standard"?
Suggest you look, two, three, four, five more than the price of weighing at six copper, quality inspection, we see the outcome.
See: to see the wire and cable products have no quality system certification certificate, see whether standard, see no name and address, date of production, inspection chapter, see the wire is printed trademark, specifications, voltage etc.. Depends on the cross-section copper wire, copper products excellence in bright colors, soft colors, or is defective.
Two test: a wire can be used to bend the hands repeatedly, usually soft, good anti fatigue strength, plastic or rubber handle elastic and no cracks on the wire insulator, is a superior product.
Three weight: good quality wire and cable, the general weight of each 100m within the specified weight range. As the cross-sectional area of the 1.5mm2 is commonly used plastic insulated single stranded copper core, each 100m weight is 1.8-1.9kg; 2.5mm2 plastic insulated single strand copper wire, each 100m weight is 3-3.1kg; 4.0mm2 plastic insulated single strand copper wire, each 100m weight is 4.4-4.6kg. The poor quality of the wire is not enough weight, or length is not enough, or wire copper core impurities too much. If the cable, especially the cable size, weight of soil solution is the most easiest way to reflect the amount of copper cable is standard and whether the conductor cross section index, there are small sections of cable stolen copper, if copper cable after weighing not up to the regulations of the state permitted error the weight range, can be identified as non standard.
Four price: because the production cost of fake wires is low, therefore, traders in the sales, often under the guise of cheap low sales, deceitful. Therefore, when buying, be careful, do not be advertised for the business, cheap, rushed to the head, and ultimately deceived. Five see copper. Qualified copper core wire copper core should be purple, shiny, soft feel.
Five look at the copper material: copper core of the copper core is purple black, yellow or white, impurities, mechanical strength, toughness is not good, a little force that will break, and the wire is often broken. Check, if you put a piece of wire head off, and then use a piece of paper in the copper core slightly rub, if there is a black white matter, 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 the third party testing agencies to detect. Based on the authority of the test report is qualified.
