Electricity plants convert the energy from the raw materials of the Earth into electrical current. This is done with the help of huge generators, which are driven by water, steam, or wind. Electricity is then distributed at a high voltage through cables laid in the ground or through overhead lines, on which often birds sit in swarms. Substations then produce electricity, which finally comes out of the sockets in our homes: 230 volts alternating current. However, many devices, such as computers, need direct current. Fuses protect us and our property from damages.
