Worldwide, the voltages in single-phase and three-phase electricity grids and the grid frequencies differ considerably in some cases. The following table provides a clear overview of the most important voltage and frequency values:
| Europe | Single-phase grid | Three-phase grid | Frequency |
|---|---|---|---|
| Belgium | 230V | 230V +/- 10% | 50 Hz |
| Bulgaria | 230V | 400V +/- 10% | 50 Hz |
| Denmark | 230V | 400V +/- 10% | 50 Hz |
| Germany | 230V | 400V +/- 10% | 50 Hz |
| Estonia | 230V | 400V +/- 10% | 50 Hz |
| Finland | 230V | 400V +/- 10% | 50 Hz |
| France | 230V | 400V +/- 10% | 50 Hz |
| Greece | 230V | 400V +/- 10% | 50 Hz |
| Ireland | 230V | 400V +/- 10% | 50 Hz |
| Italy | 230V | 400V +/- 10% | 50 Hz |
| Croatia | 230V | 400V +/- 10% | 50 Hz |
| Latvia | 230V | 400V +/- 10% | 50 Hz |
| Lithuania | 230V | 400V +/- 10% | 50 Hz |
| Luxembourg | 230V | 400V +/- 10% | 50 Hz |
| Malta | 230V | 400V +/- 10% | 50 Hz |
| Netherlands | 230V | 400V +/- 10% | 50 Hz |
| Austria | 230V | 400V +/- 10% | 50 Hz |
| Poland | 230V | 400V +/- 10% | 50 Hz |
| Portugal | 230V | 400V +/- 10% | 50 Hz |
| Romania | 230V | 400V +/- 10% | 50 Hz |
| Sweden | 230V | 400V +/- 10% | 50 Hz |
| Slovakia | 230V | 400V +/- 10% | 50 Hz |
| Slovenia | 230V | 400V +/- 10% | 50 Hz |
| Spain | 230V | 400V +/- 10% | 50 Hz |
| Czech Republic | 230V | 400V +/- 10% | 50 Hz |
| Hungary | 230V | 400V +/- 10% | 50 Hz |
| Cyprus | 230V | 400V +/- 10% | 50 Hz |
| North America | Single-phase grid | Three-phase grid | Frequency |
|---|---|---|---|
| Mexico | 127V | 200V +/- 10% | 60 Hz |
| Canada | 120V | 240V +/- 10% | 60 Hz |
| USA | 120V or 240V | 240V or 277V +/- 10% | 60 Hz |
| South America | Single-phase grid | Three-phase grid | Frequency |
|---|---|---|---|
| Argentina | 220V | 380V +/- 10% | 50 Hz |
| Bolivia | 220V/230V | 380V/400V +/- 10% | 50 Hz |
| Brazil | 110/127/220V | 220V/380V +/- 10% | 60 Hz |
| Chile | 220V | 380V +/- 10% | 50 Hz |
| Colombia | 110V | 190V +/- 10% | 50 Hz |
| Peru | 220V | Three-wire network 440V +/- 10% | 60 Hz |
| Venezuela | 120V | 208V +/- 10% | 60 Hz |
| Asia | Single-phase grid | Three-phase grid | Frequency |
|---|---|---|---|
| China | 220V | 380V +/- 10% | 50 Hz |
| India | 230V | 400V +/- 10% | 50 Hz |
| Indonesia | 127/230V | 400V +/- 10% | 50 Hz |
| Japan | 100V | 170V +/- 10% | 50/60 Hz |
| Malaysia | 240V | 415V +/- 10% | 50 Hz |
| Singapore | 230V | 400V +/- 10% | 60 Hz |
| South Korea | 110V/220V | 380V +/- 10% | 60 Hz |
| Thailand | 220V | 380V +/- 10% | 50 Hz |
| Vietnam | 127/220V | 380V +/- 10% | 50 Hz |
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