Single Phase Installation
The majority of domestic installations are single-phase. They are single phase, alternating current, and have a contracted power of up to 10 kW. Single-phase electricity connects the house via two wires: active and neutral. At the switchboard, the neutral wire is connected to earth.
Three phase installation
Three-phase installations are those that are comprised of three distinct alternating currents that divide the installation into multiple sections that are supplied by a constant power source. Currently, their standardised voltages are 400 volts. Three-phase consists of four wires: three phases and one neutral. The switchboard earths the neutral wire.
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