How big is a copper wire with a voltage of 220 volts and 50 kilowatts?

When 25 square copper wire is used with 380VAC, it can be about 38kw; A 25 square copper core cable can carry about 31kW when using 220VAC.

25 square copper core cable, about 140A current, 25 square aluminum core cable, when using 220VAC, about 22KW, when using 380VAC, about 38KW, 25 square copper core cable, about 31KW when using 220VAC; When using 380VAC, it is possible to carry about 53kW.

Notes:

1. Please check the appearance of the wire insulation or jacket before use, in case of damage caused by poor transportation or storage and affect the use effect.

2. The wire should be laid at room temperature not lower than 0 C, and the bending radius.

Not less than 6 times the outer diameter of the wire to prevent cracking.

3. The long-term allowable working temperature of the wire should not exceed 70 C, except for special specifications (flame retardant or fire-resistant wire).

4. Select the current carrying capacity according to the size of the line transmission current and the ambient temperature during use.

Suitable conductor cross-section for safety.

Summary. The 25 square millimeters of copper core wire can be loaded with 31 kW or 78 kW. With a 25 square millimeter copper core cable, the safe current of its load is about 140 amperes.

According to the power calculation formula: when the voltage is 220 volts, p = 220 * 140 = 30800 watts, that is, 31 kilowatts. When the voltage is 380 volts.

p = 380 * 140 * watts, that is, 78 kilowatts.

The 25 square millimeters of copper core wire can be loaded with 31 kW or 78 kW. The 25 square millimeter copper core cable, the safe current of its load is about 140 amperes. Answer: grinding according to the power calculation formula:

When the voltage is 220 volts, p = 220 * 140 = 30800 watts, that is, 31 kilowatts. When the voltage is 380 volts. p = 380 * 140 * watts, that is, 78 kilowatts.

First Notice. 25 square copper wires of 31 kilowatts. 1. Copper cleaning line: when the voltage is 220 volts, it can load about 31 kilowatts of power, and when the voltage is 380 volts, it can load about 53 kilowatts of power.

2. Aluminum wire: The aluminum core wire of the same specification can be loaded with a current of 100 amperes, when the voltage is 220 volts, it can negatively respond to the liquid load of 22 kilowatts, and when the voltage is 380 volts, it can load 38 kilowatts.

25 square copper wire 380v can be brought. According to the electrician's formula, multiply 2.5 times by nine, and go up minus one in order. 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 through Qiyan is two, three, four, eight, seven and six folds are full of load. The 25 square copper wire open wire is laid with a safe current carrying capacity of about 126A.

The formula for calculating the three-phase work rate is p=u i, wherein: p is the power, u is the voltage, plex i is the current, the root number is 3, and cos is the power factor (generally selected by the left and right). p=u×i× =380*126*。

50 square copper wire 380V can carry 125 kilowatts. According to the formula, the current per kilowatt of 380 volts is about 2 amps, and the current that a 50 square cable can withstand is about 250 amperes, so the result is 125 kilowatts.

How to choose a cable

Cable surface mark, when buying a cable, the first thing to pay attention to is its surface, to see if there is a printing factory name, model, rated voltage and other related signs. Generally speaking, regular businesses will make these signs clear, because it is more conducive to finding the manufacturer in time to solve the problem when there is a problem. In addition, when purchasing cables, it is also necessary to pay attention to the certificate of conformity, so as not to buy counterfeit and shoddy products.

The appearance of the cable, in the process of selecting the cable, it is also necessary to pay attention to its appearance, to see whether it is smooth and flat, whether the insulation layer and the sheath layer are damaged, and whether the words printed on it are clear, whether there is a greasy feeling to the touch, etc. In addition, you can also look at its cross-section to see the uniformity of the thickness and whether there is any eccentricity.

Conductor wire diameter, when you buy a cable, you can see whether the conductor wire diameter is consistent with the identification on the certificate. If the cross-section of the conductor is too small, it is easy to heat up during use, resulting in a short circuit.

How many square copper wires do you need for 20 kW of power and 220v of voltage?

Hello dear, leather with Li using 25 square copper wire. If the 20kw load is not long, the distance is not long, and the full load is working, 16 square copper wire can also be used. 20kw current i p u, so 20000w 220v 90 91a.

Although theoretically a smaller line can meet 20KW, in fact, a lot of electricity is burned late single-phase, so only part of the phase wire is used, and it is easy to overload the line and cause fire. Sell stoves.

20kw current i p u, so 20000w 220v 90 91a.

For safe electricity use, it is recommended to use 1 square national standard copper wire, load current 4A, that is, 20KW power, voltage 220V and 25 square copper wire.

Of course, if the 20kw load is not long, the distance is not long, and the full load is working, you can also use 16 square copper wire.

The current of 20kW is i=p u, that is, 20000w 220v=.

For safe electricity use, it is recommended to use 1 square national standard copper wire, load 4A current, that is, power 20 kilowatts, voltage 220V using 25 square copper wire.

Of course, if the 20kw load is not a long-term, long-distance, and full-load work, 16 square copper wire can also be used.

Although theoretically a 4mm wire can carry 3-phase 28kw, in fact, a lot of electricity is single-phase, so only part of the phase wire is used, which is easy to overload the line and cause fire.

If there are not many single-phase equipment, use 6mm, which can use about 10 kilowatts in single-phase, and if it is a lot of single-phase equipment, you need to use 10mm wire.

According to the calculation, p=ui i=p/u = 20000/220=

It's scary, at least 10 square meters of copper wire.

I would like to know what kind of single-phase machine has so much power.

In safe cases, at least 16 square meters of national standard copper core wire are required. Let's take a closer look.

The thickness of the wire is approximately proportional to the magnitude of the current, and the diameter is proportional to the current, not the cross-sectional area.

For example, the current carrying capacity (approximate) of copper wire is laid in the open line

1 square - 20a;

square – 25a;

square – 30a;

4 square - 40a;

6 square – 50a.

The two ratios are very similar. The current carrying capacity of the copper wire is not proportional to the cross-sectional area, and 10A needs to be subtracted when laying the pipe, which shows that the ampacity is directly related to the heat dissipation of the copper wire.

10 sq. m.

380v 1kw=2a；20KWX2=40AYJV 22 10 square four-core copper cable current carrying capacity 56A, 56-56X20% = 10 square cable to meet the needs, the cable has left a margin.

If it is three-phase electricity (380v), 10 square millimeters of copper wire is required.

If it is single-phase electricity (220V), 20 square millimeters of copper wire is required.

If it is single-phase electricity (220V), you need 20 square millimeters of copper wire, and if it is three-phase electricity (380V), you need 10 square millimeters of copper wire,