High Quality Content by WIKIPEDIA articles! This article includes a list of countries and territories, with the plugs, voltages and frequencies they use for providing electrical power to small appliances and some major appliances. Every country has differing rules regarding distribution of electricity for portable appliances and lighting. Voltage, frequency, and wall socket type vary widely, but large regions may use common standards. This article lists wall socket, voltage and frequency commonly expected for many regions. In some areas, older standards may still exist, and physical compatibility of receptacles may not ensure compatibility of voltage and frequency. Foreign enclaves or buildings frequented by tourists may support sockets not otherwise used in a country, for the convenience of travelers.