Is it illegal for the property to supply power to the store on the grounds of overload?

According to relevant information, it is not illegal, because according to the regulations of the State Grid, ordinary residents are not allowed to use three-phase electricity. If they need three-phase electricity, they must apply to the local power supply bureau. Power electricity, also called three-phase electricity, has three live wires and a zero wire. The voltage between the neutral line and each live wire is 220 volts, while the voltage between every two live wires is 380 volts.