According to the 2002 NEC 210.8(B.3) 15 and 20 amp 120 volt receptacles in non-dwelling kitchens are to be GFCI protected. We are consulting engineers for several chain restaurants. They are all having problems with the GF tripping on refrigeration equipment such as refrigerated prep tables in areas where the 2002 code has been adopted. This is causing a concern for health reasons above the nuisance of re-setting the ground-faults (whether they be receptacles or breakers.)
It is our understanding that the ground wire is used internally by equipment manufacturers (such as Delfield) and is wired in the defrost cycle of their equipment to the housing. The ground fault sensors are properly sensing the GF, but it is not an electrical hazard. This was a subject of many articles when the 99 code was issued for residential refrigerators and it was stated that you didn't want a GF on the refrigerator and it wouldn't be required since the receptacle was dedicated to the refrigerator.
Is there any one who knows more about this subject or has found an exception or solution to this rule?