How to detect the inferiority of the cable?
An evacuated tube
is two glass tubes, one within the other, joined at each end. The space between
these tubes is evacuated so the space is under a vacuum seal. Vacuums are
excellent insulators (think thermos.) The inner tube is coated with a selective
coating that converts light into heat.
Guaranteed for
fifteen years (the longest warranty on the market) Linuo tubes are made from
high quality borosilicate glass and are fused together. This provides an all
glass seal. The Linuo evacuated tube uses a unique three layer selective
coating instead of the standard single al-n/al coating. It consists of an
infrared emission layer, an absorption layer and an anti-reflective layer,
giving a much improved performance.
All Glass Evacuated Tube 58-1800mm glass tube, vacuum tube, evacuated tube, vacuum tube with selective coating, evacuated tube with selective coating Linuo Ritter International Co.,Ltd , https://www.lnrtsolarenergy.com
In our daily life, wire and cable are widely used. As it involves electricity safety, the state imposes mandatory certifications on products such as wire and cable. Among them, PVC insulated cable wires (commonly known as plastic wires) are used more often in households, and such wires should be subject to mandatory 3C certification.
So how can we distinguish the quality of wire and cable? The following methods can be used to test the quality of wire and cable:
The first is to choose products of good quality, high reputation, and after-sales service.
The second is to pay attention to the product's logo. The label of a generally qualified plastic wire product shall be marked with the name, address, rated voltage, specification and model, length, “3C†certification number, inspection qualification seal, and production date.
The third is to check the appearance of the product. The appearance of regular products should be smooth, round, uniform color, bright color and fine texture of the outer plastic skin of the wire, the conductor use electrolytic copper, the outer layer is bright and slightly soft; the non-formal products use recycled plastic, the color is dark, the texture is loose, the conductor copper The product is blackish and hard, and it is a regenerated mixed copper. It has a high resistivity, poor electrical conductivity, and can be heated in use without being safe.
The fourth is to use a pair of scissors to inject a small piece of insulation to check if the insulation thickness is uniform (not biased).
Fifth, when purchasing plastic wire products, it is best to consult an experienced professional electrician. Sixth, in the use of plastic wires, must be properly wired, generally best by a professional electrician wiring, their wiring, pay attention to the wire joints, should be firmly connected, do not simply use a tape tangled together, so that after the power connector is easy to heat.