In a change of occupancy from R or U occupancy (as defined in the International Residential Code or the International Building Code, adopted in this title), all receptacles shall be converted to three-wire grounding type and shall be effectively grounded as per the National Electrical Code Articles 406.3, or the circuit protected as provided in Article 210.8. (Ord. M-3863 §19, 2008; Ord. M-3639, 2003; Ord. M-3378, 1998; Ord. M-2998 (part), 1992; Ord. M-3133 §2 (part), 1994)