How big is the main line of a 450 square steel bar?

The landlord's question is also quite capricious. It is completely unreliable to convert the outlet diameter only by the square area after years of power supply. The source of 56 square (mm) wire diameter on the first floor and 60 square (mm) wire diameter on the second floor is even unknown. It is better to be ashamed than to choose the thread diameter. First, we should know the total power in the house, second, we should improve the synchronization rate, and third, we should consider the distance between the power supply and the "bar". And its power supply voltage level should be considered. The wire diameters of three-phase and single-phase power supplies are absolutely different. Therefore, I suggest that the landlord provide detailed parameters and friends, which is also convenient for other friends to answer for the landlord. I also hope that the landlord will supplement the questions as soon as possible, complete the great cause as soon as possible, and don't delay the opening of the bar! Remember, remember!