817标准有以下关于结构的描述:
7 Configurations
7.1 The NEMA configurations ofvarious attachment plugs and receptacle combinations referenced in this Standard are inaccordance with Wiring Devices–Dimensional Specifications,ANSI/NEMA WD6.The Figures referenced as Section C3 contain configurations found in the Standard for Wiring Device Configurations,UL1681.