Henry analysis - rapid inspection of wire quality

Wire quality rapid inspection method

Wires are indispensable materials for users in the process of electricity consumption. Their quality is directly related to the safety of electricity consumption of millions of households. Therefore, in the purchase or selection, how quickly and accurately check the quality of the wire is the skill that the majority of electricians must master.

weight

Good quality wires are generally within the specified weight range. Such as the commonly used cross-sectional area of ​​1.5mm2 plastic insulated single strand copper wire, each 100m weight of 1.8 ~ 1.9kg; 2.5mm2 plastic insulated single strand copper wire, weight per 100m 2.8 ~ 3.0kg; 4.0mm2 plastic Insulated single-strand copper wire weight is 4.1-4.2kg per 100m. Poor quality wires have insufficient weight or are either of insufficient length or have too many impurities in the wire copper core.

homogeneous

Qualified copper core wire copper core should be purple, shiny and soft to the touch. The shoddy copper core copper core is purple black, yellowish or white, impurities, mechanical strength is poor, poor toughness, it will be broken with a little force, and often within the wire disconnection phenomenon. When checking, you just strip the wire 2cm, and then use a piece of white paper on the copper core to make a brief look. If there is black material on the white paper, the copper core contains more impurities. In addition, the counterfeit wire insulation seems to be very thick, in fact, most of them are made of recycled plastic. Over time, the insulation layer will age and leak.

factory

Pseudo-inferior wires are often “three non-products”, but there are also ambiguous origins and other signs, such as manufacturing in China, a province in China, or manufacturing in a certain city, which is actually equivalent to a non-standard production area.

price

Because of the low cost of producing counterfeit and inferior wires, when selling, traders often sell cheap products at low prices, making people fooled.

Wire and cable in the power system, especially in the transmission line is essential, it also has several categories, there are special cables, insulated cables and so on! Wires are indispensable materials for users in the process of electricity consumption. Their quality is directly related to the safety of electricity consumption of millions of households. Therefore, in the purchase or selection, how quickly and accurately check the quality of the wire is the skill that the majority of electricians must master.