What is a single core cable, a three core cable, a pin shaped cable, and a horizontal cable?

The core of the cable is the number of guides or cores, and the cores can be made up of multiple conductors stranded, so you say that you see as if there are dozens. I'll just introduce it below.

Cable is a very general word called wire and cable in the profession Wire and cable are divided into 5 categories: bare wires and bare conductors, power cables, wires and cables for power equipment, communication cables and optical cables, and magnet wires.

You're talking about power cables.

The power cable has +1 core.

2 cores of cable for 50 mm².

The following units are omitted) above the conductor is 180° fan, and below 50 is round;

The cable with 3 cores is 120° sector for more than 50, and round for less than 50;

The cable of 4 cores above 50 is 90° fan-shaped, and below 50 is round;

The 50 or more of the 3+1 core is a 100° fan, and the ground wire is round.

Single-core and multi-core should be to put together a plurality of related cables with a perimeter, such as AC four-core and five-core cables, four-core cables are to assemble phase wires and neutral wires together, and five-core cables are grounding wires added on the basis of four-core;

The zigzag cable and the horizontal cable should be named according to the shape of the cable in the sleeve.

The cable is mainly composed of the following 4 parts. Conductive core: Made of a high conductivity material (copper or aluminum).

Depending on the softness of the cable under the conditions of use, each core may be made up of a single conductor or multiple conductors stranded. Insulation: The insulating material used as a cable should have high insulation resistance, high breakdown electric field strength, low dielectric loss and low dielectric constant.

The commonly used insulating materials in cables are oil-impregnated paper, polyvinyl chloride, polyethylene, cross-linked polyethylene, eraser, etc. Cables are often classified by insulating materials, such as oil-impregnated paper insulated cables, PVC cables, cross-linked polyethylene cables, etc. Sealing sheath:

Protects the insulated core from machinery, moisture, moisture, chemicals, light, etc. For insulation that is susceptible to moisture, lead or aluminum extruded sealing sheaths are generally used. Protective overlay:

It is used to protect the sealing sheath from mechanical damage. Generally, galvanized steel strip, steel wire or copper strip and copper wire are used as armor to wrap around the sheath (called armored cable), and the armor layer plays the role of electric field shielding and preventing external electromagnetic interference at the same time. In order to avoid the corrosion of steel strips and steel wires by the surrounding media, they are generally coated with asphalt or wrapped with an impregnated jute layer or extruded polyethylene and vinyl chloride sleeves.

In general, the cable is three or four cores. The so-called core refers to the same insulation layer as a core, not every small copper wire or aluminum wire. When you see the cable, you will generally see that there are three circles or four circles on the cross-section, and a few circles are a few cores.

Sometimes there will be three large circles, a small circle, which is also a four-core, and the small circle is the zero line. The shape of the word and the horizontal type are the names of the geometric shape of the cable, and the round or flat shape is due to the needs of use.

Summary. The difference is: there is a big difference between a three-core cable of the same diameter and three one-core cables in terms of load, and the load of three one-core cables is larger than that of a three-core cable.

Three-core cables with the same diameter have less maximum load current than two-core cables, four-core cables are smaller than three-core cables, and armoured cables have smaller maximum load currents than non-armoured cables.

This is caused by the heat dissipation of the cable, and the single-core cable is of course faster than the three-core cable, so the current of the single-core load can be larger than that of the three-core cable.

What is the difference between one three-core cable and three single-core cables.

The difference is: there is a big difference between a three-core cable of the same diameter and three one-core cables in terms of load, and the load of three one-core cables is larger than that of a three-core cable. Three-core cables with the same diameter have less maximum load current than two-core cables, four-core cables are smaller than three-core cables, and armoured cables have smaller maximum load currents than non-armoured cables.

This is caused by the heat dissipation of the cable, and the single-core cable is of course faster than the three-core cable, so the current of the single-core load can be larger than that of the three-core cable.

Hello, theoretically there will be no difference, it can be used. However, according to safety regulations, it is not allowed to use three single-core cables.

The three-core cable is an external source of three wires, the three-core power cord is generally brown is the live wire, the blue is the neutral line, the yellow and green is the ground wire, and the three-core cable can be used for three-phase electricity or single-phase supply lines with ground wire.

The core of the cable is the number of guides or cores, and the cores can be made of multiple conductors, so you say that there are dozens of good socks you see. I'll just introduce it below.

Cable is a very general word called wire and cable in the profession Wire and cable are divided into 5 categories: bare wires and bare conductors, power cables, wires and cables for power equipment, communication cables and optical cables, and magnet wires.

You're talking about power cables.

The power cable has a Chang Tomato +1 core.

For cables with 2 cores, for more than 50 square millimeters (the units are omitted below), the conductor is 180° fan, and the below 50 is round;

The cable with 3 cores is 120° sector for more than 50, and round for less than 50;

The cable of 4 cores above 50 is 90° fan-shaped, and below 50 is round;

The 50 or more of the 3+1 core is a 100° fan, and the ground wire is round. Nai Rent Cha.

A one-core cable means that the cable is composed of only one group of wires, and a three-core cable means that the cable is composed of three groups of wires that are insulated and independent, and each group of wires has an independent insulation layer, and the group and the group are mutually insulated, and the three-core cable has a large calorific value.

In order to ensure that the cable can run safely for a long time, the current carrying capacity of the three-core cable and the one-core cable is less than that of the one-core cable under the premise of the same cross-sectional area.

Special precautions for high-voltage AC single-core cable High-voltage AC line should use multi-core cable as much as possible, and the following precautions should be taken when the single-core cable must be used for the circuit with a large working current

1) The cable should be unarmored or armored with non-magnetic materials. In order to avoid the formation of circulation, the metal shield should be grounded only at one point.

2) All wires in the same circuit should be placed in the same tube, conduit or trunking, or wires of all phases should be installed and fixed together with wire clamps, unless they are made of non-magnetic materials.

3) When installing two, three or four single-core cables to form a single-phase loop, a three-phase loop or a three-phase and neutral loop respectively, the cables should be in contact with each other as much as possible. In all cases, the distance between the outer sheath of two adjacent cables should not be greater than the diameter of one cable.

Summary. Medium-voltage cables usually refer to cables with rated voltages between 1kV and 35kV. In this range, medium-voltage cables are usually only available in single core and 3 core forms, which is due to the following reasons:

Single-core cables: Single-core cables are usually used for high-current applications, and since single-core cables have only one conductor, they can withstand higher currents. In addition, the insulation of single-core cables can be more uniform and dense, which can better prevent electrical interference and protect the cable from mechanical damage.

3-core cables: 3-core cables are typically used to carry lower currents, such as in power distribution systems in residential and industrial areas. A 3-core cable consists of three conductors, one of which is a neutral conductor that balances the current in a three-phase circuit.

The design of the 3-core cable can better meet the needs of three-phase circuits, while also reducing the size and weight of the cable. Therefore, single-core cables and three-core cables have their own applications. However, in some special applications, there are also cases where 4- or 5-conductor medium-voltage cables can occur, e.g. in motorway lighting systems.

I'm still a little confused, can you be more detailed?

Medium-voltage cables often refer to cables with rated voltages between 1kV and 35kV. In this range, medium-voltage cables are usually only available in single core and 3 core forms, which is due to the following reasons: Single core cables:

Single-core cables are usually used to carry large currents, and since single-core cables have only one conductor, they can withstand higher currents. In addition, the insulation layer of the single-core cable can be more uniform and dense, which can better prevent electrical interference and protect the cable from mechanical damage. 3-core cable:

3-core cables are usually used to transmit lower currents, such as in the power distribution system of Bili in residential areas, industrial areas and other places. A 3-core cable consists of three conductors, one of which is a neutral conductor that balances the current in a three-phase circuit. The design of the 3-core cable can better meet the needs of three-phase circuits, while also reducing the size and weight of the cable.

Therefore, single-core cables and three-core cables have their own applications. However, in some special applications, there are also cases where 4- or 5-conductor medium-voltage cables can occur, e.g. in motorway lighting systems.