How much current can three 25 square copper wires pass?

Three 25 square copper wires carry a current of about 105A.

Other currents are shown in the following table

The high-current wire is composed of two parts, the wire and the terminal, which are brased and connected, and the wire core is wound with multiple strands of copper wire, and the diameter of each strand is; The skin is an insulating protective sleeve woven of nylon, of which 10-50A is a single layer and 100-3000A is a double layer.

The length of the wire and the form of the terminal can be processed according to the user's requirements. its current density.

is 5a per square millimeter.

The rated voltage is 660V.

When calculating the current carrying capacity of the wire, in the three-phase power supply, there is no such thing as how much current is used by all three wires, because you have to use 3, do you use 1? Can a loop be formed? Do you use 2 strips?

Is it out of phase for the entire circuit? Therefore, when talking about the current carrying capacity of the wire, it refers to three (three-phase) or two (single-phase) wires, and the current carrying capacity in the circuit, the current carrying capacity of 25 square copper wire is about 105A, whether it is used in three-phase or single-phase, the current carrying capacity will not change. Done, thanks!

If you have any questions, you can continue to ask.

The copper wire has a square millimeter safe current carrying capacity, then it is 25*, whether it is used for three-phase or single-phase, it is OK to ensure that the current does not exceed the above data.

The rated current carrying capacity of 25mm2 copper wire is about 100A, if it is a bare copper wire, it is about 140A, and the ambient temperature is below 25 degrees.

For copper wire with a cross-sectional area of square millimeters, the allowable long-term current is: 16A-25A.

According to the national standard, the wire load current value: the cross-sectional area of the copper core wire is square millimeter, and the allowable long-term current is 16A 25A.

Converted power 3500 5500W. Specifically, it will be selected according to different factors, such as: the use is different due to the length of the wire, the length of continuous use, and the method of use (factors affecting heat dissipation such as pipe threading and direct burial).

Current Knowledge Points:

In electromagnetism, the amount of electricity passing through any cross-section of a conductor per unit time is called current intensity, referred to as current, the current symbol is i, the unit is ampere (a), abbreviated as "ampere" (André Marie Ampère, 1775 1836, French physicist and chemist, has made outstanding achievements in the research of electromagnetic interaction, and has also contributed to mathematics and physics). The SI unit of electric current is named after its surname).

The free charge in the conductor moves regularly and directionally under the action of the electric field force to form an electric current.

Electrically stipulated: the direction of the directional flow of positive charge is the direction of the current. In addition, in the project, the directional flow direction of the positive charge is also the current direction, and the magnitude of the current is expressed by the charge Q flowing through the conductor section per unit time, which is called the current intensity.

Nature has many kinds of carriers that carry electric charges. For example: electrons that can be moved in a conductor, ions in an electrolyte, electrons and ions in a plasma, quarks in hadrons. The movement of these carriers forms an electric current.

The maximum current of a square wire depends on the material of the wire.

According to the formula, the current carrying capacity of an aluminum wire below the square is 9 times that of its cross-section.

For example, if the square wire has a carrying power of 220, the owner should consider it according to the actual electricity consumption (the power of the electrical appliances, the number of connected electrical appliances, and the strength of the wires) when carrying out circuit transformation.

The general copper wire safety calculation method is: the safe ampacity of the square millimeter copper power cord is 28A.

Power p = voltage u current i 220 volts 18 amps 3960 watts. The current value of the wire load (partial) specified in the standard

The 35 square cable can withstand about 150A of electrical ridge flow.

Generally, the current carrying capacity of the cable is multiplied by the voltage multiplied by the power due to the simple number of skins, the cable is 180 meters long, the voltage drop can be simply estimated, the voltage difference is divided by = (power permeability * resistance + reactive power * reactance) by the voltage, the power can be calculated according to 50kw, the resistance and impedance are calculated according to the cable parameters you choose, and the voltage is calculated according to the voltage difference, if the voltage difference is higher than 7%, it will not be.

This is all a theoretical estimation method. Reactive power can be calculated according to the power factor or conversion.

Extended Information: Cable Safety Requirements:

1. When the cables cross each other, the high-voltage cable should be below the low-voltage cable. If one of the cables is protected by a pipe or separated by a partition within 1m before and after the crossing, the minimum allowable distance is.

2. When the cable and the thermal pipeline are close or crossed, if there are thermal insulation measures, the minimum distance between parallel and cross is and.

The maximum current carrying capacity of the 25 square three-phase four-wire copper core cable is about 140A, and it can withstand the inductive load power of 55kW with a rated voltage of 380V.

Generally, the safe ampacity of copper conductor is determined according to the allowable maximum temperature of the core, the cooling strip and the laying conditions. Generally, the safe current carrying capacity of copper wire is 5 8a mm, and the safe current carrying capacity of aluminum wire is 3 5a mm.

Key points》The safe ampacity of the general copper wire is 5 8a mm, and the safe current carrying capacity of the aluminum wire is 3 5a mm. Such as: the recommended value of the safe ampacities of mm bvv copper wires, and the recommended value of the safe ampacities of 4mm bvv copper wires 4 8A mm = 32A.

The cut-off current of BVV-25mm2 copper core wire is 140A.

According to the formula of the circle area s=r 2 r=(s), the diameter d=2(s) =2*(25, with a reference, the copper wire is slightly thicker than chopsticks and a little thinner than a cigarette.

About 25 square copper wire, as an important branch of the wire, can be used in many places in practical life, and for most users, it can meet the needs to a certain extent.

If it is an aluminum wire, it can withstand a current of 100A, and the pipe is discounted by 8%, considering the temperature by 9%, and the bare aluminum wire is calculated as 150A; If it is a copper wire, it can withstand a current of about 120A, and the pipe is discounted by 20%, considering the temperature by 9%, and the bare copper wire is calculated as 180A.

There are two main types of magnet wires: enameled wire and wrapped wire. Enameled wire is made by coating insulating paint on bare copper wire, the insulation layer is thin, the occupied volume is small, and it is widely used in various electrical appliances and instruments.

The properties of enameled wire vary depending on the nature of the insulating material used. The wrapping wire mainly includes yarn wrapping wire, silk wrapping wire, glass wire wrapping wire, paper wrapping wire and plastic film wrapping wire, etc., among which yarn wrapping wire and silk wrapping wire may be eliminated due to poor temperature resistance and large occupied volume. The glass filament wrapped wire is wrapped around the round copper wire and impregnated with silicone resin, which can withstand 180 high temperature and has good insulation performance and mechanical strength.

The maximum current carrying capacity of the 25 square three-phase four-wire copper core cable is about 140A, and the inductive load power of the rated voltage of 380V is between 55KW.

Generally, the safe ampacity of copper conductor is determined according to the allowable maximum temperature of the core, cooling conditions and laying conditions. Generally, the safe current carrying capacity of copper wire is 5 8a mm, and the safe current carrying capacity of aluminum wire is 3 5a mm.

Key points》The safe ampacity of the general copper wire is 5 8a mm, and the safe current carrying capacity of the aluminum wire is 3 5a mm. Such as: the recommended value of the safe ampacities of mm bvv copper wires, and the recommended value of the safe ampacities of 4mm bvv copper wires 4 8A mm = 32A.

The maximum current of 25 square copper wire is 80-100A. It depends on the nature of your load. If the general load is within 100 meters. 70-80A is the safest current.

The copper wire of 25 square millimeters in close proximity can pass a current of about 200A, and the three-phase load is about 110kw. The principle of selecting the wire: 1) Limit the cross-section of the wire (safe ampacity) according to the heating condition at close range; 2) Distance in safety.

Don't be misled, not by the nature of the load, but by the laying conditions.

Everyone knows that wires come in different sizes, for example, there are late brightness 1 square and square. In fact, it is necessary to choose according to the location of use to meet the use, but how much power does a 25 square copper wire have?

1. How much current does a 25 square copper wire have?

The theoretical value of the current of the square copper wire, 25 square copper wire is 125 amperes, when actually used, it is necessary to take into account the loss when wearing the pipe, and the loss caused by the influence of temperature, generally speaking, the actual current carrying capacity is about 15% lower than the maximum value, so the actual current should not exceed 105 amperes. Yard wide.

If 25 square copper wire is used for single-phase circuits, that is, the voltage is 220 volts, which can reach about 24 kilowatts. For three-phase circuits, the voltage is 380 volts, which means that its power can reach about 65 kilowatts.

2. How much current can be loaded by different wires.

1. There are different specifications of wires, and the more common ones in life are 1 square wire, and the load area of each square millimeter can pass through the current of about 5 amperes, and in the single-phase circuit of 220 volts, it can reach about ampere, and the power size can probably withstand kilowatts.

2. If you choose a square wire, its maximum working current is 20 amps, and the power is about 3000 watts to 4400 watts.

3. If you choose a square wire, its safe current is generally about 13 20 A, so the power is basically between 4400 watts and 5500 watts.

Square wires are also more commonly used, the current volume of household wires is about 32 amperes, and if it is household electricity, it can load 6 8 kilowatts of electrical appliances.

5. There are also 6 square wires, which is more than enough to install air conditioning lines, because its current can reach 63 amperes, and the load reaches 10 kilowatts.

Through the above analysis, we can clearly see that the cross-sectional area of different wires is different, the power carried, and its current carrying capacity are different, so when arranging wires, you need to choose according to your needs.

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5 amps, up to 10 amps, 10* so it is speculated that it can withstand a minimum of ampere, and a maximum of 25 amps. Hope it helps you and I wish you a happy life!