Jay,
[quote]the 20 amp receptacle should be polarized for 20 plugs and therefore the 15 amp 16 gage extension cord couldnt be plugged into it, ... [quote]
15 amp cord caps will fit in 20 amp receptacles...20 amp caps won't fit in 15 amp receptacles. At least that is how it is in the US.
Don


Don(resqcapt19)