ARTICLE 553 Floating Buildings

Receptacles rated not less than 30 amperes or more than 50 amperes shall be of the locking and grounding type. For various configurations and ratins of locking and grounding-type receptacles and caps, see ANSI/NEWA 18WD 6-1989, National Electrical Manufacturers Association’s Standard for Dimensions of Attachment Plugs and Receptacles. ................
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