NEMA wiring devices are made in current ratings from 15 to 60 amperes (A), with voltage ratings from 125 to 600 volts (V). NEMA connectors are power plugs and receptacles used for AC mains electricity in North America and other countries that use the standards set by the US National Electrical Manufacturers Association. The NEMA 5-15R device on the far left is most common the two rightmost designs are typically seen in older buildings. All accept a 1-15P plug the two on the left also accept grounded 5-15P plugs the second from the left also accepts 5-20P plugs.
Main article: AC power plugs and sockets Ungrounded (L) and grounded (R) power plugs Common North American 125-volt receptacles.
