There are more and more types of wire and cable in the market. How to distinguish the "national standard" and "non-standard" of wire and cable? One look, two test, three weighing, four price, five copper, five Distinguished.
Nowadays, wire and cable are used more and more widely, and accordingly, there are more and more types of wire and cable sold on the market. So, how do we distinguish between the "national standard" and "non-standard" of wire and cable? To this end, the editors of this journal consulted the industry veterans who gave five measures to distinguish the "national standard" and "non-standard" wire and cable:
one look! It depends on whether the wire and cable products have a quality system certificate, whether the certificate is standardized, whether there is a factory name, a factory address, an inspection chapter, a production date, and whether the trademark, specification, voltage, etc. are printed on the wire. Also look at the cross section of the copper core of the wire, the superior color of the copper color is bright, the color is soft, otherwise it is a defective product.
Two try! It is advisable to take a wire head repeatedly and bend it by hand. Any soft touch, good fatigue resistance, strong plastic or rubber feel and no crack on the wire insulation are excellent products.
Three weighs! Good quality wire and cable, generally within the specified weight range per 100m weight. Such as the commonly used plastic insulated single-strand copper core wire with a cross-sectional area of ​​1.5mm2, 1.8-1.9kg per 100m weight; 2.5mm2 plastic insulated single-strand copper core wire, 3-3.1kg per 100m weight; 4.0mm2 plastic The insulated single-strand copper core wire has a weight of 4.4-4.6 kg per 100 m. Poor quality wires have insufficient weight, either insufficient length or excessive copper core impurities.
Four price! Due to the low production cost of counterfeit and shoddy wires, traders often sell at low prices with low prices and good prices when selling. Therefore, when buying, be careful, don't stun the mind for the "good quality and low price" advertised by the merchants, and eventually be deceived. Five look at copper. The copper core of the qualified copper core wire should be purple, shiny and soft to the touch. The copper core of the inferior copper core wire is purple-black, yellowish or white, with many impurities, poor mechanical strength, poor toughness, and will break when a little force is applied, and the wire is often broken. When inspecting, you only need to peel off the wire for a while, then use a piece of white paper to rub it slightly on the copper core. If there is black material on the white paper, it means that there are more impurities in the copper core, which can be regarded as "non-standard." "Wire and Cable.
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Label: Five strokes distinguish between national standard and non-standard wire and cable
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