During a house renovation I ran into this question back in 2012 when the contractor and the electrician were gutting the kitchen, took an oversize refrigerator/freezer that had arrived early
and rolled it out of kitchen into an adjoining room; connected it with a power distributor + extension cord combo to a 20-amp circuit in that room; naturally I questioned this and was told it was all within code much to my surprise.
From a direct quotation on a electrician-moderated forum I found (Mike Holt's and others) and also reading through NEC codes to double-check;
It's 15 amps per NEC code....there is a rule that says that every receptacle that serves a kitchen countertop has to be on a 20 amp "small appliance branch circuit and if near a water line, must be a 20-amp GFI" BUT that rule has an exception that allows a household fridge to be on its own dedicated 15 amp circuit. That is an "it is OK" kind of rule, not a "it must be done this way" kind of rule. Section 110.3(B) requires that the listing and labeling instructions for a listed product also. be followed. So if the installation instructions for the fridge require a dedicated 20-amp branch circuit it could be deemed a requirement.
I would suggest looking for the phrase "small appliance branch circuit," somewhere around article 210.11 (or it might be 210.52).
Though not advisable, if a power distributor strip of sufficient capacity was used equal to the above and it is 3-pin ground complete. from the wall the appliance attach point, it would technically not be out of code.
I'd politely suggest we lighten up the mood on these threads and not pounce on others, least of all based on assumptions not facts.