 How to use the calculator online?
 Calculation of the power loss in the cable under the school formula
 Why do I need to do the calculation of voltage loss in the cable?
 Ways to reduce the power loss in the cable
 Table for the calculation of the wire crosssection of power
 Video on the correct choice of wire gauge and typical mistakes
How to properly and accurately to make a cable cross section of the calculation of the loss of voltage? Very often in the design of power supply networks require competent calculating cable loss. The exact result is important to select the material with the required conductor crosssectional area. If the cable is not properly, this will entail multiple material costs, because the system will quickly fail and cease to function. Thanks to sites assistants, where there is a readymade program for the calculation of the cable cross section and the toll on him, it can be done easily and quickly.
How to use the calculator online?
The finished table, enter information according to the selected material of the cable, Power system load, voltage network, temperature of the cable and its method of lining. After you click "calculate" and get ready to result.
Such a calculation voltage line drop can be safely used in, if you do not take into account the resistance of the cable line under certain conditions:
 Pointing power factor cos phi equal to unity.
 DC line network.
 AC power with a frequency 50 Hz conductors with sections made up 25.095.0.
The results obtained must be used according to each individual case, taking into account all the errors of cables and wires.
Be sure to fill in all the values!
Calculation of the power loss in the cable under the school formula
Obtain the necessary data can be as follows:, using counting sequence indicators: ΔU=I·RL (loss of line voltage = current * resistance of the cable intake).
Why do I need to do the calculation of voltage loss in the cable?
Needless to energy dissipation in the cable may result in significant power losses, excessive heat and damage to the cable insulation. It is dangerous for people and animals. When a major length of the line is the impact on the cost of the light, which also adversely affect the material condition of the premises of the owner.
In addition, the uncontrollable loss of voltage in the cable can cause failure of many appliances, as well as their complete destruction. Very often, tenants use cable crosssections less than you need (to save), that soon causes a short circuit. A future costs of replacement or repair of wiring do not pay purses "thrifty" users. That is why it is so important to find the right section of the cables laid wires. Any wiring in residential domestoit initiated only after a careful calculation of losses in the cable. Important to remember, electricity  does not give a second chance, but because all you need to do initially correctly and accurately.
Ways to reduce the power loss in the cable
Losses can be reduced in several ways:
 increase the cable crosssectional area;
 decrease in the length of material;
 load drop.
Often, with the last two points is more difficult, and therefore it has to do it by increasing the cross sectional area of core electrical cable. This will help reduce resistance. Such an embodiment has several costly moments. First of all, the cost of using such material is very palpable for many kilometers systems, and therefore it is necessary to choose the correct cable section, in order to reduce power loss in the cable threshold.
Online calculation of voltage loss allows to do it for a few seconds, with all the additional characteristics. For those, who wish to doublecheck the results manually, There physicomathematical formula for calculating the voltage loss in the cable. certainly, it is the perfect companion for every designer of power grid.
Table for the calculation of the wire crosssection of power
cable crosssection, mm^{2} 
open wiring 
Laying in the channels 

copper 
aluminum 
copper 
aluminum 

current 
Power, kW 
current 
Power, kW 
current 
Power, kW 
current 
Power, kW 

BUT 
220AT 
380AT 
BUT 
220AT 
380AT 
BUT 
220AT 
380AT 
BUT 
220AT 
380AT 

0,5 
11 
2,4 
– 
– 
– 
– 
– 
– 
– 
– 
– 

0,75 
15 
3,3 
– 
– 
– 
– 
– 
– 
– 
– 
– 

1,0 
17 
3,7 
6,4 
– 
– 
14 
3,0 
5,3 
– 
– 
– 

1,5 
23 
5,0 
8,7 
– 
– 
15 
3,3 
5,7 
– 
– 
– 

2,0 
26 
5,7 
9,8 
21 
4,6 
7,9 
19 
4,1 
7,2 
14,0 
3,0 
5,3 
2,5 
30 
6,6 
11,0 
24 
5,2 
9,1 
21 
4,6 
7,9 
16,0 
3,5 
6,0 
4,0 
41 
9,0 
15,0 
32 
7,0 
12,0 
27 
5,9 
10,0 
21,0 
4,6 
7,9 
6,0 
50 
11,0 
19,0 
39 
8,5 
14,0 
34 
7,4 
12,0 
26,0 
5,7 
9,8 
10,0 
80 
17,0 
30,0 
60 
13,0 
22,0 
50 
11,0 
19,0 
38,0 
8,3 
14,0 
16,0 
100 
22,0 
38,0 
75 
16,0 
28,0 
80 
17,0 
30,0 
55,0 
12,0 
20,0 
25,0 
140 
30,0 
53,0 
105 
23,0 
39,0 
100 
22,0 
38,0 
65,0 
14,0 
24,0 
35,0 
170 
37,0 
64,0 
130 
28,0 
49,0 
135 
29,0 
51,0 
75,0 
16,0 
28,0 