Thanks Don.
Jay here are the configurations we use in the US, I don't know if they match Canada.
As you can see the 20 amp receptacle is intended to accept both 15 and 20 amp plugs.
In reality there are almost no home appliances that come with a 20 amp plug on them.
Virtually all 125 volt home appliances have 15 amp plugs.
Bob
[This message has been edited by iwire (edited 11-23-2006).]