In electricity, a phase refers to the distribution of a load. there is two-phase and three-phase. Think of it as a group of people working together to get a job done. in 2 phase, two people work together to get the job done. in three phase, three paper are working to get the job done. in essence, three phase will be more efficient because load is distributed to three people compared to 2 in 2-phase.
therefore, a three-phase power supply better accommodates higher loads and is mostly used in commercial and industrial facilities while 2 phase is used for domestic purposes.
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