Hutch — Yes. The newer 4-wire versions are NEMA 14-30 [typically for electric clothes dryers] and 14-50 [typically for electric cooking ranges.]
Some US travel trailers have a 125V, 30-ampere "sort-of-crowfoot" plug and cap that is not a NEMA standard. I don't know its evolution. They also use {sometimes multiple} NEMA 14-50 plugs for larger power demands for travel trailers.
Marine applications typically use one or multiple locking 125/250V 50-ampere 4-wire devices [NEMA L14-50] for shore power.
[This message has been edited by Bjarney (edited 09-08-2002).]
