The main difference between single-core and multi-core is the different flexibility of wire. In essence, there is nothing wrong with the two, but the use environment is different. For example, if you want to use it for pipe wiring in the home, it is obviously better to use a single core, because the single core has certain strength, convenient threading and simple joint connection. But there are many bends for a line, and a line has been bent many times. Obviously, it is better to use multi-core, because multi-core is flexible and can bend well without breaking. However, there is a problem that multi-core conductors are prone to poor contact and heat, so the connector should be handled well when used.

Three inspection methods

weight

High quality welding wire is usually within the specified weight range. Such as: common plastic insulated single-stranded copper core wire, cross-sectional area 1.5, per1200m weight1.8-1.9kg; 2.5 plastic insulated single copper core wire, with a weight of 2.8-3.0kg； per 100m; 4.0 Plastic insulated single copper core wire, with a weight of 4. 100m/-4.2kg.. The wires with poor quality have insufficient weight or length, or the copper core of the wires has too many impurities.

copper

Qualified copper core wire copper core should be purple, shiny and soft to the touch.

factory

Fake and shoddy wires are often "three no products", but there are also vague labels on them, such as those made in China and some provinces and cities in China. In fact, it is equivalent to unmarked origin.

price

Because of the low production cost of fake and shoddy wires, vendors often sell them at low prices under the guise of good quality and low price, which makes people fall for it.