Mostly home electricity is provided with two hot wires and one neutral coming into them which supplies you a voltage of 240/120 volts. However, the basic voltage is slightly less which is around 230/110 volts. This power supply is called single phased power.
You might be aware of alternating current which is taught in physics. So, the power coming to your home is indeed alternating. In common language, alternating current allows electricity to be transported along long distances. Hence, it is feasible for the power department to provide you with electricity.
Now coming to wiring systems again, if you notice only one hot wire along with neutral then you might be getting a power of only 115 volts. It all depends on the wiring system. This type of wiring, however, is mostly seen in electrical devices. Few exceptions like dryer or hot water tanks use both hot and neutral wires … Read the rest