NEMA connectors are power plugs and sockets used for AC mains electricity in North America, Central America, Japan, Taiwan and other countries that use the standards set by the US National Electrical Manufacturers Association. They are defined by the IEC as the Type A and Type B plugs. NEMA wiring devices are made in current ratings from 15 to 60 amperes (A), with voltage ratings from 125 to 600 volts (V).