What diameter cable should be used for a three-phase four-wire load of 50kw in a hotel?

First calculate the theoretical current when all the power is turned on

Three-phase current = power/voltage/voltage phase/load power factor (the hotel has various loads, and the power factor is expected to be around 0.9 )

Current=50000/380/1.732/0.9, about 84.5A

The following table is the maximum current carrying capacity of general copper core cables and aluminum core cables, which should be used when selecting With a margin of about 20%, you can choose a copper core cable of 25 square meters or more as the main line.