The conversation between human and AI assistant.
If single phase power is 220 volts, why is 3 phase 440 volts and not 660?
Do all countries use the same voltage for single phase and three phase power?
No, different countries and regions may have different standard voltages for single phase and 3 phase power. For example, in North America, the standard voltage for residential single phase power is 120V, while in Europe, the standard is 230V. Similarly, the standard voltage for 3 phase power may also vary, ranging from 380V to 480V depending on the region and application.