15 kW three-phase motor needs to be equipped with 6mm copper wire or10m2 aluminum wire. A 15kW three-phase motor has a power of p= 15000W and a voltage of 380V. According to the formula, the power is P = voltage U× current I× 1.732×0.80, and the available current I = 15000 ÷ 380 ÷ 0. According to the relationship between the current and the conductor, the current of 28.84 amps can be obtained, and 6 square millimeters of copper wire or 10 square meter of aluminum wire is required.

Second, some correct selection methods of home improvement wires

1, first of all, good water resistance.

The outer surface of some wires is easily deformed and cracked. If water leaks during use, electrical appliances will be burned, short-circuited or even caught fire, causing casualties. Therefore, the sheath must be tough and the cable must have good waterproof performance.

2. Choose copper core cable

Both cables and wires need good conductivity. There are copper-core cables and other cables in the market, and copper-core cables are the most widely used in indoor decoration. In addition, there are several different types of copper core wires, such as large radius copper core and multi-strand copper core.

3. Wires with high load capacity

Household electricity consumption is not fixed, sometimes high and sometimes low, and all electrical appliances have been turned on. If the load of the cable is not very large, and it is hot in summer, the cable will easily burn due to high temperature, thus causing a fire.

4, the main line must be thick core.

The main line needs to use thick copper core cable. After all, it carries the load of various electrical appliances and needs thick copper core cable with good performance. Generally, 4-square-millimeter cables and 6-square-millimeter cables can be selected, especially under special circumstances. Multicore cable can be bypassed.