Could any good person please tell someone about wires and cables? Very urgent! It s the electrical a

The wire is composed of one or several soft wires, covered with a light and soft sheath; A cable consists of one or several insulated wires wrapped around a tough outer layer made of metal or rubber. Cables and wires are generally composed of three parts: core, insulating skin and protective sheath. The characteristics of commonly used cables are as follows:

CEF - ethylene propylene rubber insulated neoprene sheath, marine flame retardant power cable. CVV - PVC insulated, PVC sheathed marine flame retardant power cable. Oxygen chamber wires often use BV, BX, RV, RVV series wires, including:

BV - copper core PVC insulated wire, long-term allowable temperature 65, minimum temperature -15, working voltage AC 500V, DC 1000V, fixed laying indoor, outdoor, can be applied openly or covert. bx - copper core rubber insulated wire, the maximum use temperature is 65, laid indoors. RV - PVC insulated single-core flexible wire, the maximum operating temperature is 65, the minimum operating temperature is -15, the working voltage is AC 250V, DC 500V, which is used as the internal wiring of instruments and equipment.

RVV - copper core PVC insulated and sheathed flexible wire, allowing long-term working temperature 105, working voltage AC 500V, DC 1000V, used in wet, high mechanical protection requirements, often moving and bending occasions. In fact, there is no strict boundary between "wire" and "cable". Generally, the products with a small number of cores, small product diameter and simple structure are called wires, those without insulation are called bare wires, and the others are called cables; The larger conductor cross-sectional area (more than 6 square millimeters) is called a large wire, the smaller one (less than or equal to 6 square millimeters) is called a small wire, and the insulated wire is also called a cloth wire This is relatively simple and easy to understand!

Cables generally have more than 2 layers of insulation, most of them are multi-core structures, wound around the cable reel, and the length is generally greater than 100 meters. The wire is generally single-layer insulation, single core, 100 meters in a roll, and no disc. Common models of cables:

VV means: PVC insulation (the first V), PVC sheath (second V) YJV22 means: cross-linked polyethylene insulation (YJ), PVC sheath (V), steel tape Kai (22) Model with "ZR" or "FR" is a flame retardant cable (wire).

Add "L" for aluminum wire The type of wire is simpler: BVV - PVC insulated and sheathed copper core wire, BV - PVC insulated copper core wire, BYJ - copper core XLPE insulated polyolefin insulated wire, BVR - PVC insulated copper core flexible wire, BX - rubber insulated copper core wire, RHF - neoprene rubber sheathed copper core flexible wire.

2) The diameter is small and is called "line"; The larger diameter is called a "cable".

3) The simple structure is called "line"; The complex structure is called "cable".

However, with the expansion of the scope of use, many varieties of "cable in the wire" and "cable in the cable". So there is no need to make a strict distinction.

In daily habits, people call household cloth wires wires, and power cables are referred to as cables.

In general, we refer to wires and cables as wires and cables. There is no precise and fixed conceptual distinction between wires and cables, and the distinction is generally made only by everyday experience. In a narrow sense, it is divided into wires and cables, and in a broad sense, it is generally referred to as cables.

So, what's the difference between wire and cable?

Wires and cables are generally composed of three parts: wire and cable conductors, insulation layers and sheath layers. Wire generally refers to the type of wire and cable composed of a single or multiple conductors twisted with copper or aluminum, and then added an insulating layer or sheath layer to the outside of the wire and cable conductor. The cable is generally composed of one or more conductors, and each conductor of the cable is twisted by one or more stranded conductors, and then covered with insulation or sheath.

This is the most straightforward difference between wire and cable.

According to the physical form of the conductor, the wire can be divided into various types, such as solid conductor, stranded conductor, and braided conductor. According to whether the wire and cable have an insulation layer, it can be divided into two types: bare wire and insulated wire. A bare wire is a wire that does not have an outer insulation or protective sheath outside the wire conductor.

A cable can be understood as a large wire consisting of one or more independent insulated wires that are insulated from each other to form a conductor core and add a protective layer. The number of conductor cores of the wire is generally small, and at the same time, the diameter of the wire conductor is also relatively small, and the structure is relatively simple. The conductor core of the cable is larger, the diameter is larger, and the structure is more complex.

For example, some cables have steel belts, some cables have braids, and so on.

Wires are generally used for daily household use, such as threading, leads, etc., and are also used in home appliance manufacturing, motor parts connection, power supply facility connection, etc., for the transmission of low-power electric energy and signal lights. Cables, on the other hand, are generally used to transmit, distribute, and transmit strong electrical energy or signals in power supply lines, with large currents (tens of amperes to thousands of amperes) and high voltages (220V to 35kV and above). According to the use, cables are generally divided into power cables, shielded cables and control cables, etc.

To sum up, in general, we define wires and cables as wires with a single conductor and cables with multiple conductors. A small conductor diameter is called a wire, and a large conductor diameter is called a cable. Wires and cables with simple structures are called wires, and cables with complex structures are called cables.

1: The difference between wires and cables:

1) Flexible Wire & Flexible Cable:

A flexible wire is a wire consisting of a conductor with a finite number of roots and a small cross-sectional area.

Flexible cable is a cable that can meet the soft requirements of use in terms of structure and material.

2) Definition of insulated cable: (See also.

An insulated cable is an aggregate composed of the following parts:

1: One or more insulated cores.

2: They have their own cladding, if available

3: They have their own total layer of protection (if available).

4: They have their own outer protective layer (if available).

It can be seen from the above that one or more insulated cores can form a cable, so there is no strict difference between wire and cable, but the cable structure is generally more complex, with internal and external sheaths. Nowadays, we generally call the complex structure and the simple structure of the large cross-section called the cable, and the simple structure of the small cross-section is called the wire.

The difference between the wire conduit and the cable conduit is what is worn inside, because the specification stipulates that the wire conduit and the cable conduit are consistent, and the pipe capacity requirements are similar in terms of options, thickness, material, flame retardant performance, etc., and the construction method is also similar.

A bunch of wires twisted together to transmit electricity on the basis of ensuring insulation is a cable.

Cables are made of one or more conductors that are insulated from each other with an outer insulation and protective layer. To understand it simply, the wire diameter inside will be thicker, and there will be a better protective layer on the outside (the material of the protective layer is also different) and an insulating layer. The wire is generally an insulator wrapped around the wire.

Cables are suitable for outdoor wiring Wires are generally suitable for indoors.

Since the number of wires needs to be multiplied when counting wires, it is processed with "wire conduit" in the software;

If it is a cable or a cable of a cable nature, it will not be multiplied by the corresponding number of cores, and the "cable duct" treatment will be applied in the software;

If there are both wires and cables, you need to separate them with " ", enter them in the cable duct.

1. What are the types of commonly used wires and cables according to their uses?

Answer: According to the use, it can be divided into bare wires, insulated wires, heat-resistant wires, shielded wires, power cables, control cables, communication cables, radio frequency cables, etc.

2. What are the types of insulated wires?

Answer: There are the following kinds of common insulated wires: PVC insulated wires, PVC insulated wires, nitrile PVC mixture insulated wires, rubber insulated wires, agricultural underground directly buried aluminum core plastic insulated wires, rubber insulated cotton yarn textile wires, PVC insulated nylon sheathed wires, PVC insulated soft wires for electricity and old lighting, etc.

3. What kind of occasions is the cable tray suitable for?

Answer: The cable tray is suitable for indoor and outdoor overhead laying of power cables and control cables in general industrial and mining enterprises, and can also be used for indoor and outdoor erection in telecommunications, radio and television departments.

4. What are the cable accessories?

Answer: Commonly used electrical accessories include cable terminal junction boxes, cable middle junction boxes, connecting pipes and terminals, steel plate wiring slots, cable trays, etc.

5. What is a cable intermediate joint?

Answer: The device that connects the cable with the conductor, insulating shield and protective layer of the cable to connect the cable line is called the cable intermediate joint.

6. What is the electrical main wiring?

Answer: The main electrical wiring is the connection mode of the main electrical equipment and bus bar in the power plant and substation, including the connection mode between the main bus and the power system of the plant according to certain functional requirements.

7. What regulations should be followed when selecting the cross-section of the power cable?

Answer: The selection of power cables should follow the following principles:

1) The rated voltage of the cable should be greater than or equal to the rated voltage of the power supply system at the installation point;

2) The continuous allowable current of the cable shall be equal to or greater than the maximum continuous current of the power supply load;

3) The cross-section of the wire core should meet the requirements of the stability of the power supply system when it is short-circuited;

4) Check whether the voltage drop meets the requirements according to the cable length;

5) The minimum short-circuit current at the end of the line should enable the protective device to operate reliably.

8. What are the advantages of cross-linked polyethylene cable and oil-paper cable?

A: (1) Easy to install, because it allows a small minimum bending radius and light weight;

2) Not subject to line drop;

3) Good thermal performance, high allowable working temperature and large transmission capacity;

4) The cable accessories are simple and all of them are dry structure;

5) Simple operation and maintenance, no oil leakage;

6)**Lower;

7) High reliability scatter and low failure rate;

8) The manufacturing process is less, the process is simple, and the economic benefits are significant.

Wires and cables are indispensable building materials for our house decoration. In modern homes, wires and cables are the most common conductors of current in the home, and many people can't tell the difference between cables and wires. Both are made of wires, but their structure and performance are quite different.

Next, we have also collected some information, let's learn the difference between cables and wires.

The difference between wire and cable is one.

The first difference between wires and cables is that wires can be used to transmit confidence and electrical energy, and can also be used as components and connecting wires for manufacturing motors and electrical appliances, which are generally made of copper and aluminum; Cables are mainly used for communication and electricity, so cables are also divided into communication cables, power cables, control electric cables, etc. Cables are generally not used in the manufacture of motors, but for the Warrior's large-span rack Sun Fool empty line, etc.

The difference between wire and cable is two.

The wire is a conductive metal wire used to carry the current, with solid, stranded, foil and other forms, the size of the wire is small, the structure is simple; The cable is an insulated conductor composed of one or more conductive wire cores insulated by each other and placed in a sealed sheath, which is larger in size and more complex in structure.

Standards for wires and cables.

The production of wires and cables needs to meet national standards, otherwise there will be potential safety hazards. The production standard of the wire is that it must meet the specified bearing voltage to ensure safety, and the wire should also have low conductivity, mechanical properties and thermal properties. The material of the wire must also have corrosion resistance and weather resistance, so as to ensure the service life of the wire; The requirements of cables are similar to the standards of wires, and the main emphasis is on safety, and there are relevant standards for the use of raw materials and the continuity of production.

Wire hail and products used to transmit electrical (magnetic) energy, information and realize electromagnetic energy conversion.

Wires and cables in a broad sense are also referred to as cables, and cables in a narrow sense refer to insulated cables. It can be defined as an aggregate consisting of one or more insulated cores, and each of them may have an overlay, a total protective layer and an outer sheath, and a cable may also have additional uninsulated conductors.

The structural elements of wire and cable products can be generally divided into four main structural components: wire, shelf and dust edge layer, shield and sheath, as well as filling elements and bearing elements. According to the requirements of the product and the application, some products have extremely simple structures. Shed Zen.