NFPA 99
4.3.3.2 Receptacle Testing in Patient Care Areas.
4.3.3.2.1 The physical integrity of each receptacle shall be confirmed by visual inspection.
4.3.3.2.2 The continuity of the grounding circuit in each electrical receptacle shall be verified.
4.3.3.2.3 Correct polarity of the hot and neutral connections in each electrical receptacle shall be confirmed.
4.3.3.2.4 The retention force of the grounding blade of each electrical receptacle (except locking-type receptacles) shall be not less than 115 g (4 oz).