3 phases is cheaper than single line for delivering a houses power. You can get away with 3 smaller cables than the larger cables needed for 110V or 230V low vo

3 phases is cheaper than single line for delivering a houses power. You can get away with 3 smaller cables than the larger cables needed for 110V or 230V low voltage single phase at a particular amperage. The cost of termination of 3 phases is insignificant compared to the cost of the rest of an electrical system in a modern home. It’s the better system.