In rural areas where the price of a three-phase power transformer network supply is high, particularly the single-phase power transformer delivery is used. In that area the motor loads are small and rare.

Small commercial houses and individual residences generally have three-wire single-phase supply, more often with one customer per supply of transformer. Three-phase service will be given to larger consumers like multiple-unit apartment blocks, large buildings, factories, shopping centers and office blocks and so on.

In cities, network power supply is used with many customers in the populated areas. There is a lot of supply of power transformer which linked to supply power in hundreds to thousands of KV. To determined more than a few hundred square meters there will be a use load.

A pure single-phase generation motor connected with the help of a single-phase supply. This does not generate a rotating magnetic field. Whereas practical single-phase motors constantly have some way of create a rotating field to produce initial power.

A phase converter can be used in some application. This phase converter can change single-phase efficacy power into 3-phase voltage to activate 3-phase equipment .This converter is simply a rotating machine. Those place where utility 3-phase is not available or if they are too expensive to install then these phase converters are usually efficient to use.