| This is why refrigeration is not required by any code to be on Ground Fault devices.
All refrigeration units are susceptible to producing fault currents, just a normal event with with the compressors.
But very important that the regular receptacle be grounded properly, as should every outlet in a building.
Only all other general purpose receptacles in basements, utility rooms, and garages need to be GFI.
Those not for equipment, such as furnaces, sump pumps, and garage door openers , and refrigerators and lights never need to be GFI protected. | 
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