Recently, a friend asked me how to judge the quality of wires, Or rather, the issue of truth or falsehood, So today, let's take a look together, This important material that can be seen everywhere in daily life, How exactly can one distinguish the genuine from the fake!

Fire burning method

This method involves directly burning the wires with fire, If the wire quality is poor, Then it will burn very fast, There is an open flame and a lot of thick smoke will come out; If the wire quality is good, Then its burning speed will be slow, There is no thick smoke or only a small amount of smoke, There is no open flame.

Hands-on detection method

This method is to bend the wire by hand, Bend it repeatedly, Soft to the touch, Plastic or rubber has a large elastic feel, Good fatigue resistance, Moreover, there are no cracks on the insulation of the wires, It's just a good wire.

Look at the copper material inside

As is well known, Peel off the outer sheath of the wire, There will always be copper materials inside, Because copper material is used as the core of the wire, Good electrical conductivity, The price is also relatively low; So, If the quality of the wire is better, The brighter the copper inside is, And the luminosity is uniform, The luster is also good; In color, The copper core of a qualified wire should be purplish red; You can also gently touch the top of the copper wire with the palm of your hand, It should feel smooth, There is no stinging sensation, A good wire should feel soft to the touch.

However, the copper core of inferior wires is purple-black, Yellowish or whitish, There are many impurities, Poor mechanical strength, Poor toughness, It breaks easily with a little force; Another thing is that there are many impurities in the copper core, The inspection method is to peel off one end of the wire 2 Centimeter, Then, use a piece of white paper to rub it slightly on the copper core, If there is black substance on the white paper, It indicates that there are relatively many impurities in the copper core; In addition, The insulation layer of inferior wires seems very thick, In fact, most of them are made of recycled plastic, As time goes by, The insulating layer will age and leak electricity.

Weighing method for judgment

Good wire, There will always be a reasonable weight range, Neither too light nor too heavy, Comply with regulations. For example, the commonly used cross-sectional area is 1. 5 Square millimeter plastic-insulated single-strand copper core wire, every 100 The weight of the rice is 1. 8~1. 9 Kilogram;

2. 5 Square millimeter plastic-insulated single-strand copper core wire, every 100 The weight of the rice is 3~3. 1 Kilogram;

4. 0 Square millimeter plastic-insulated single-strand copper core wire, every 100 The weight of the rice is 4. 4~4. 6 Kilograms, etc;

Poor-quality wires do not meet the specified weight requirements, Moreover, there are problems such as insufficient length or excessive impurities in the copper core of the wire.

Look at the external packaging method

This method is to make use of you "Have a sharp eye" , Observe the wires carefully. The insulation layer of genuine wires will all have markings, Such as the specification and model of the wire, 3C Certification, etc, And the handwriting is clear, It cannot be washed off by ordinary water, It's even more impossible to wipe off; There is a certificate of conformity in the electrical coil, The certificate of conformity contains the manufacturer's address and phone number, 3C Identification, Quality system certification, Voltage level, Wire model and specification, etc. However, low-quality wires do not have or lack the relevant information of these models or certifications.

Wires are very common things in our daily life, Of course, it also has its advantages and disadvantages, Friends, No matter this "false" How realistically the wires are camouflaged, As long as we use the above-mentioned method to judge the quality of the wires, Whether you are an electricity worker or not, you can recognize it!