Profile: General Marine Products, Inc. specializes in offering power plugs, power receptacle, power plug assembly and in line connectors. The brands we offer include Viking Plugs™. Shore power receptacles are used at all naval surface facilities to supply electrical power to both surface ships and navy nuclear submarines. This multi-contact three phase receptacle is rated for 440v, 500 amps duty. It can be supplied potted to the type and length of cable specified, or, as an unterminated receptacle to allow for on-site assembly.