08-09-2016, 06:54 AM
Power is trasmitted at high voltage then transformers are used to reduce high voltage to low voltage used by appliances for safety reasons. The more industrial the process and the more controlled the environment the higher the final voltage because higher voltage means less current and it is presumed that trained technicians are less likely to poke things in sockets than children playing in the living room would be. There would always be transformers involved because power is transmitted at thousands of volts and with a few exceptions used at hundreds of volts.