Ill. Admin. Code tit. 77, § 205.1760
In areas used for patient care or treatment, all receptacles operating at over 100 volts shall be grounded by an insulated copper conductor, sized in accordance with Table 250-95 of NFPA 70 (see Section 205.115(a)(1)(B)), and installed with the branch conductors supplying these receptacles.
(Source: Amended at 34 Ill. Reg. 7915, effective May 25, 2010)