Code-accepted or not, one alternative substitute to a receptacle and male cap on SO cord is a female connector body on the SO-cord opposite end mated with a locking-style ‘flanged inlet’ or ‘motor flange’ mounted on the utilization equipment.
 
http://www.hubbellcatalog.com/wiring/section-b-datasheet.asp?FAM=Locking_Devices&PN =HBL2515




[This message has been edited by Bjarney (edited 10-04-2003).]