Attributes . cULus Certified E42190, Standard UL 498 Attachment Plugs and Receptacles, UL 943 GFCIs, Federal Specification: WC596, Hospital Grade. Standard CSA C22.2 No.42 General Use Receptacles, CSA C22.2 No.144 GFCIs Conforms to NEMA WD-1 and WD-6 . Names