This is the most common range for residential and light industrial use. A significant focus of the standard was the harmonization of European voltages to the standard, a transition that was largely completed by 2003. System Type Nominal Voltage (50 Hz) Nominal Voltage (60 Hz) Three-phase, four-wire 230/400 V, 400/690 V 120/208 V, 277/480 V, 347/600 V Single-phase, three-wire Single-phase, two-wire 2. Medium and High Voltage AC Systems
: Covers railway power, specifying DC voltages up to 3,000 V and AC single-phase options up to 25,000 V . iec 60038 standard voltages pdf 103
: Includes common low-voltage (LV) systems like 230/400 V (50 Hz) and 120/208 V (60 Hz). This is the most common range for residential
IEC 60038 2009 Standard Voltages Electrical Supply Systems Design four-wire 230/400 V