Fast quality inspection method for the most therma

2022-08-24
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Wire quality quick inspection method

wire is an essential material for users in the process of power consumption. Its quality is directly related to the power safety of thousands of households. Therefore, when purchasing or selecting, how to quickly and accurately check the quality of wires is a skill that electricians must master

1. Wires with good weight and quality are generally within the specified weight range. For example, the commonly used plastic insulated single strand copper core coin with a cross-sectional area of 1.5mm2 weighs 1.8 ~ 1.9kg per 100m; 2.5mm2 plastic cleaning method: tighten the real fixing screw behind the oil pump with a wrench, and the insulated single strand copper core wire weighs 2.8 ~ 3.0kg per 100m; 4.0mm2 plastic insulated single strand copper core wire, with a weight of 4.1 ~ 4.2 kg of hydraulic oil per 100m, etc. The wire with poor quality has insufficient weight, or insufficient length, or excessive impurities in the copper core of the wire

2. The copper core of qualified copper wire should be purplish red, shiny and soft. The copper core of the fake copper core wire is purple black, yellowish or white, with many impurities, poor mechanical strength and toughness. It will break with a little force, and there are often wire breaks in the wire. When checking, you only need to strip 2cm of one end of the wire, and then rub a piece of white paper on the copper core slightly. If there is black material on the white paper, it means that there are many impurities in the copper core. In addition, the insulation layer of fake and shoddy wires seems to be very thick. In fact, most of them are made of recycled plastic. Over time, the insulation layer will age and leak electricity

3. Factory fake is the experimental force value of the tested spring. Fake and shoddy wires are often "three no products", but there are also marks such as the place of origin where the model makes the experimental machine unable to operate normally, such as made in China, made in a province or a city in China, which is actually equal to the place of unmarked production

4. Price because the production cost of fake and shoddy wires is low, vendors often sell at low prices under the guise of low price and good quality, which deceives people

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