The electricity consumption of the hotel is 300 kilowatts. What size cable is used?

The electricity consumption of the hotel is 300KW, which requires copper cable 120 m2.

The current of the cable I = p/(1.732 ucosφ) = 300/(1.732 x 0.38 x 0.75) = 607a (calculated according to the standard three-phase mains voltage, cos φ is the load power factor, and the average motor is 0.75).

The rated current per square copper wire is 6A, so the number of squares of copper wire =607/6= 10 1 square. Specifications of copper conductor used in the project are: (1.5; 2.5; 4; 6; 10; 16; 25; 35; 50; 70; 95; 120; 150; 185), etc. So you can choose 120 square copper wire.

The choice of cable is also related to the length of the cable, the laying form of the line and the temperature of the cable environment. If the cable is long (more than 100 m), buried in the ground, and the ambient temperature is high, the copper wire of 150 m2 should be selected for safety.