Cable Diameter Table, Cable Outer Diameter Specification Table

The specification of the cable, the diameter of the table estimates the formula: 2.5 times nine, and subtract one straight number up. Thirty-five times 3.5, double in a group minus five. The conditions have been changed and converted, and the high-temperature nine-fold copper has been upgraded. The number of pipe roots is two, three, four, eight, seven and six folds full of load current.

Note: (1) The formula in this section does not directly indicate the current carrying capacity (safety current) of various insulated wires (rubber and plastic insulated wires), but "multiplies the cross-section by a certain multiple.""to express, through mental arithmetic. As can be seen from Table 5-3:

The multiplier decreases as the cross-section increases. "Multiply two by nine and go up by one"It is said that the aluminum-core insulated wire of various cross-sections of 2 5mm' and below, its current carrying capacity is about 9 times the number of cross-sections. For example, 2 5mm' wire, the current carrying capacity is 2 5 9 22 5 (a).

The relationship between the current carrying capacity and the number of cross-sections of the wire from 4mm' and above is to go up along the wire number, and the multiple is gradually reduced to L, that is, 4. Thirty-five times 3.5, double in a group minus five. ", talking about 35mm"The current carrying capacity of the wire is 3 5 times the number of cross-sections, i.e. 35 3 5 122 5 (a). From 50mm' and above wires, the multiplier relationship between the current carrying capacity and the number of cross-sections becomes two two wire numbers in a group, and the multiples are subtracted by 0 5 in turn.

That is, the current carrying capacity of the mm' wire is 3 times the number of cross-sections"The current carrying capacity of the wire is 2 5 times the number of its cross-sectional area, and so on. The conditions have been changed and converted, and the high-temperature nine-fold copper has been upgraded. "。

For cables of the same cross-section, the drawings and requirements are different, and the diameter is also different.

The cable outer diameter specification table is as follows:

This includes the comparison table of cable type and outer diameter dimensions, the technical parameters of cross-linked cables, and the table of cross-linked polyethylene insulated PVC sheathed power cables.

Wire & Cable Introduction:

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

Wire and cable in a broad sense is also referred to as a cable, and a cable in a narrow sense refers to an insulated cable, which can be defined as: a collection composed of the following parts; One or more insulated cores, as well as their respective cladding, total and outer sheaths, and cables may also have additional uninsulated conductors.

Introduction of bare wire body products lead transportation:

The main characteristics of this type of products are: pure conductor metal, no insulation and sheath layer, such as steel core aluminum stranded wire, copper and aluminum busbar, electric locomotive line, etc.

The processing technology is mainly pressure processing, such as smelting, calendering, drawing, stinging, pressing and stranding, etc.; The products are mainly used in suburbs, rural areas, user mainlines, switch cabinets, etc.

Power Cable Introduction:

The main characteristics of this type of products are: extruding (winding) the insulating layer outside the conductor, such as overhead insulated cables, or several cores stranded (corresponding to the phase wire, neutral wire and ground wire of the Huaihe beam system of the power system).

Such as more than two cores of overhead insulated cables, or add a sheath layer, such as plastic rubber sheathed wires and cables. The main process technologies are drawing, stranding, insulation extrusion (wrapping), cable formation, armor and sheath extrusion, etc., and the different process combinations of various products are different.

The above content reference: Encyclopedia - Wire and Cable <>

The cable specifications are as follows:

The current value of the wire load specified in the national standard (partial).

The cross-sectional area of the copper core wire diameter allows for long-term current.

mm2 16a~25a

4 mm2 25~32a

6 mm2 32~40a

The cross-sectional area of the aluminum core wire diameter allows for long-term current.

mm2 13a~20a

4 mm2 20~25a

6 mm2 25~32a

Cable specification: Cable specification is the meaning of the representation of the number of cores and cross-sectional dimensions of wires and cables. The wire and cable products used in the power system mainly include overhead bare wires, busbars (mother draft celery wires), power cables (plastic cables, liner oil paper power cables (basically replaced by plastic power cables), rubber cables, overhead insulated cables), branch cables (replacing part of the busbar), magnet wires and electrical equipment for power equipment or respect difference wires.

The list of cable specifications and models is as follows:

1. Specifications and models of VV, VLV, VV22 and VLV22 cables.

2. YJV, YJV22, YJV32, YJV42, YJV43, YJLV, YJLV22, YJLV32 and other cable specifications and models.

3. BV, BLV, BVR, BVVB, BVV cable specifications and models.

4. RV, RVB, RVS, RVV, RVVB cable specifications and models.

5. Specifications and models of RVP and RVVP cables.

6. NH-VV, NH-VV22 cable specifications and models.

Key points for cable purchase].

1. Length: This is one of the tricks often used in cutting corners, some people will say, I bought the wire marked with meters, and it is 100 meters, you have to pay attention, he has a meter mark, but in the middle part, some profiteers are less than 10 meters. For example, after 30 meters, 40 meters will be marked.

2. Noisy gossamer: This is one of the most common ways to cut corners in the city. For example, a square BV wire, commonly known as copper single, is a copper wire of a wire, why is it called squared?

This is because the cross-sectional area of the copper wire of this wire is square millimeters. The square BV wire, the diameter of the copper wire is.

3. Copper quality: real copper is a reddish color, while yellow copper is yellow. In addition, copper is very soft, and brass is hard. As long as you don't buy copper-clad aluminum (aluminum, but with a layer of copper plated on the outside, generally used for soft wires), brass is not too fake at present.

4. PVC material: This is too professional, not much to talk about, one thing is certain, no one has made the copper wire very standard, and cut corners on PVC.

List of cable specifications and models:Cable specification and model format: YJV-3 * 185 + 2 * 95, model + several times several This format indicates the number of cable cores in the first few fingers, and the second refers to the cross-sectional area of a single core; It represents a YJV cable consisting of 3 cores with a cross-section of 185 square meters and a 2-core cross-section of 95 square millimeters.

The specifications of power cables are flat, 6 flat, 16 flat, 25 flat, 50 flat, 95 flat, 120 flat; And m.

Key features:Extrude (wrap) the insulating layer outside the conductor, such as overhead insulated cables, or several cores stranded (corresponding to the phase wire, neutral wire and ground wire of the power system), such as overhead insulated cables with more than two cores, or add a sheath layer, such as plastic rubber sheathed wires and cables. The main process technologies are drawing, stranding, insulation extrusion (wrapping), cable formation, armoring, sheath extrusion, etc., and the different process combinations of various products are different.

This is what I found in **, and there are some specific instructions on it. (Electric Encyclopedia**).

1. 50 cable specifications and models.

1. According to national standards and specifications: the surface of the cable should have the name of the manufacturer, product model, specification square and rated voltage and other marking parameters. When there is a problem in the use of the cable, the manufacturer can be found in time, and consumers must pay attention to this when purchasing cables.

At the same time, consumers should pay attention to whether the manufacturer's name, product model, rated voltage and printed mark on the surface of the wire are consistent with the printed mark on the surface of the wire when purchasing cables, so as to prevent counterfeit products.

2. Cable specification and model format: YJV-4*50+1*50, model + several times several This format indicates the number of cable cores in the first few fingers, and the second refers to the cross-sectional area of a single core; It represents a YJV cable consisting of 4 cores with a cross-section of 50 square meters and 1 core with a cross-section of 50 square millimeters. YJ—XLPE insulation; v—PVC insulation or sheath;

Square cable specification model table:

1) VV cable 50 square specifications and model table:

VV cable 50 square specifications model table.

2) YJV cable 50 square specifications model table.

YJV cable 50 square specifications model table.

3. BV cable 50 square specifications and model list.

BV cable 50 square specifications and model table.

4. VV fire-resistant cable 50 square specifications and model list.

VV fire-resistant cable 50 square specifications model list.

Two, three-phase five-wire cable specifications and models list.

The meaning of three-phase five-wire cable is: three-phase provides power for the equipment, and then adds a neutral wire to do the neutral line, and a protective wire, under normal circumstances, the neutral wire has no current, and in special cases, there is a current through, so for the sake of safety, add a separate protective wire (generally connected to the equipment shell, etc.). Therefore, the three-phase five-wire cable model has 5 cores or 3+2 cores or 4+1 cores (the neutral wire is half of the main line cross-section).

As can be seen from the previous introduction table, the three-phase five-wire cable models mainly include VV five-core cable and YJV five-core cable and the corresponding aluminum core cable, such as: 5*6 KVV-500 5* ZR-KVVRP 5*; A five-core cable is a cable with five cores insulated from each other, and a plastic sheath or steel armor and plastic sheath that wrap these five cores on the outside. The colors of the five-core cable are yellow, green, red, blue, and there is a PE yellow-green two-color wire.

The cable specifications and models are as follows:

1. Control cable.

These include KVV, KVVR, KVVP, and KVVP2.

2. Power cables.

These include YJV, YJLV, YJV22 and YJLV22.

3. Fire-resistant cables.

The interrogators include NH-VV, NHVV22, NH-KVV, NH-YJV and NHYJV22.

4. Welding machine cable.

These include yc, yz, yh, yhf, and jhs.

5. Communication cables.

These include YHA, YHA22, YHA53, YHA23, and YHAT.

6. Computer cables.

These include DJYVP, DJYPV, and DJYPVP22.

7. Mining cables.

These include MVV, MVV22, MKVV, and MKVV22.

The role of the cable:

The function of the protective layer is to protect the wire and cable from the invasion of external impurities and moisture, so as to balance and prevent external forces from directly damaging the power cable. Power cables are cables used for transmission and distribution of electric energy, and power cables are often used in urban underground power grids, power station lead-out lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seawaters. In power lines, the proportion of cables is gradually increasing.

Power cable is a cable product used to transmit and distribute high-power electric energy in the backbone line of the power system, including 1-500kV and above various voltage levels, and various power cables that are not excavated.