(Iron, PVC) or wear a tube, or other methods of pressure drop, over 100 meters should consider the voltage drop considering the future increase in the 4-6 current of the principle, the surplus amount of copper, aluminum 2-3, direct burial wire and a standard

, For example, use 15 square enough, we chose 25 short a bit more conservative, and certainly did not matter.
Safety of general copper is calculated:
Safe carrying capacity of 2.5 mm2 copper power cord - 28A.
Safe carrying capacity of 4 mm2 copper power cord - 35A.
6 square mm copper power lines safe carrying capacity - 48A.
10 square millimeter copper power lines safe carrying capacity - 65A.
16 square millimeter copper power lines safe carrying capacity - 91A.
25 square millimeter copper power lines safe carrying capacity - 120A.
If it is to take the copper wire in the wire, diameter 1.5 to 2 times.
If the copper current of less than 28A per square millimeter 10A to take is certainly safe.
If the copper wire current is greater than 120A per square millimeter 5A to take.
The current cross-sectional area of the conductor can through normal according to their need to conduction current total number of options, can generally be determined in accordance with the following doggerel:
Ten, one hundred on 25 543 circles, Qi Shi Jiu five two and a half times, through the pipe temperature, 8% off, and half bare, copper wire upgrade count. "(This port decision is based on Aluminum Core insulated wire, for surface in the

Subject to the conditions of the ambient temperature of 25 degrees, if the conditions are different, the port must otherwise stated. )
Explain to you, is 10 square feet of aluminum wire, the number of square millimeters multiplied by 5, if the copper, up a file, such as 2.5 square copper wire, 4-square calculation of one hundred to

Are cross-sectional area multiplied by the square of the following 2, 25 multiplied by 4, more than 35 square multiplied by three, of Qishi and 95 square are multiplied by 2.5, so a few formulas should be easy to remember.