3000W of the electrical use of the wire
Three-phase power supply? Or single-phase power supply? Single-phase power supply can take 2.5mm2 copper wire, three-phase power supply, then you can take a little smaller, 1.5MM2 enough
If you use copper wire, then within 200 meters within 3 kilowatts with 1.5 square wire is enough if it is aluminum core, then recommended within 100 with 4 square (all require the national standard line) if the distance is large, then a large model
This is based on the current, single-phase current I = P / U = 3000/220 = 13.6A three-phase current I = P / (1.732 * U * 0.8) = 3000 / (1.732 * 380 * 0.8) = 5.69A You can choose the appropriate wire according to the standard, see below
