I live in India . I have Three Phase Line in my Home & Single Phase Line in Office . However the rates for both Single Phase & Three Phase are the same ( Rs.2.70/unit for first 50 units , Rs. 3/unit for next 50 , Rs. 3.60/unit for next 100 , Rs. 4.20/unit for next 100 & Rs.4.70/unit thereafter ) . How is this possible ?Maybe some Electrical student can explain to me . I am from Commerce Background but from what I understand from Internet , Three Phase has 3 wires & Single Phase has 2 wires . Somehow , shouldn't Single phase be costing less per unit ? Please Elaborate . Also what is difference between an ElectroMagnetic Electricity Meter & a Static Electricity Meter ?