AC power is the greatest invention of human history. Most of the items we use in modern life are almost inseparable from the existence of electricity.Such as computer, air conditioning, TV, mobile phone, etc.When we use electricity, we cannot do without the wires. It is a transmission medium of electricity, and the quality of the wires affects the safety of our daily appliances. When we choose the wire, we must pay special attention to some purchase factors.And what is the difference between the wires we often say?Let me explain the science -related knowledge of the wires, lets take a look!
What is the difference between wires and cables
1. Different definitions
In a broad sense, people call the wires and cables uniformly as wire cables.There is no accurate and fixed conceptual distinction between the wires and cables, and generally only distinguishes with daily experience.In a narrow sense, it is divided into wires and cables. The wires and cables are generally composed of three parts: wire and cable conductor, insulation layer, and cover cover.
2. Different structures
The wire is composed of one or more soft wires. The outer bread is a soft guard, which is used to carry current conductive metal wires.There are various forms such as solid, twisted, or foil weaving.According to the insulation status, it is divided into two categories: nude and insulating wires.
The cable consists of an insulating wire composed of one or more interactive conductive wires in the sealing cover.It can be used to protect the coverage layer for transmission, distribution energy or transmission signals.The difference between it is mainly the size of the cable and the complicated structure.
3. Different diameter
The small diameter is called "wire"; the large diameter is called "cable".The simple structure is called "wire"; the complex structure is called "cable".
With the expansion of the scope of use, many varieties are "cables in the line" and "wired in the cable".So there is no need to strictly distinguish.In terms of daily habits, people call home cloth wires as wires and electric cables referred to as cables.The wires and cables mainly include nude wires, winding lines, power cables, communication cables and optical cables, and electrical equipment.
What are the classifications of household wires
1. Hard line
It is called BV wires, which are mainly used for power supply, lighting, sockets, air conditioners, and are suitable for AC voltage 450/750V and below power device, daily appliances, instrument and telecommunications equipment.The hard line has a certain hardness. It will be more convenient in terms of angle and straightening.
2. Soft wire
It is called BVR wires. It is suitable for AC voltage 450/750V and below power device, daily electrical appliances, instrument and telecommunications equipment, such as power distribution boxes.The soft line is relatively complicated, and the soft line of high -frequency circuit is larger than the hard line load.
3. Hard and soft lines (weak wires)
Consistence of single -rooted and several copper core wires, generally refers to the wire and cable with a low voltage and a relatively low voltage.
4. Common specifications of wires
How many square meters of wires refer to the size of the wires, and the common size is 1.5 square meters, 2.5 square meters, 4 square meters, 6 square meters, 10 square meters.The square of the wire is a square millimeter, which refers to the cross -area size of the wire wire.
Purchase of wires
1. Look at the packaging
There is a complete certificate in the packaging. The qualification certificate should include complete information such as specifications, execution scale, rated voltage, length, date, and factory name address.See if there are "CCCs" and production licenses for compulsory product certification in China; see if there is a quality system certification; see if the qualified certificate is standardized; see if there are trademarks, specifications, voltage, etc. on the wire.
2. Check the wire size
In the relevant scale, the error of the wire length cannot exceed 2%, and the cross -sectional diameter cannot exceed 0.02%. However, there is a large number of short pounds in length and two, and fakes on the section.
3. Look at the color of copper
The copper core of the qualified copper core should be purple -red, shiny, and soft.The bronze core of the pseudo -inferior copper wire is purple, yellowish or white.
4. Look at the insulating glue
The insulation layer of the pseudo -inferior wire seems to be very thick. In fact, most of them are made of regenerative plastic. As long as it is slightly squeezed, the squeezing will become white and the powder drops.
5. Look at the weight of the wire
Good quality wires are generally within the weight range of the delineation.For example, the common cross -sectional area is 1.5mm2 plastic insulation single -stock core wire, and the weight per 100m is 1.8 to 1.9kg.
6. Look at the wire core size
Several cores generally refer to cables, and it specifically refers to the inside of the insulating skin. There are several insulating wires inside the insulating skin. There are several cores. If it is endless, how many roots are a core.The two cores refer to the two -mounted wires wrapped together and are generally used in household electricity within 220V.There are two types of three cores, one is two -phase and three -line system, one is three -phase and three -line system, 4 cores are made of three -phase and 4 lines, three fire lines, one zero line, and 5 cores are three -phase and 5 -line system.
7. Look at the brand
Famous brand, of course, quality.Therefore, when buying, it is best to choose a reputable brand product.Because only big brands will cherish their brand image and brand value, they will not do false publicity, and they pay more attention to quality and services.

Related tags： Machinery