enblethen wrote:
Let us think about the installation in a different way.
Let us say that you install a 20 amp receptacle in your living to feed an AC unit that came equipped with a 120 amp cord body on #14 wire fed by a 15 ampere breaker.
Are you going to change it out when you move? No!
Are you going to rewire the whole house? No!
If the air conditioner had a 5-20 plug I would upgrade with a dedicated 20 amp circuit.
Assuming I was pulling wire I might even go #10 because the marginal cost is low.
Just put a 5-20 outlet on a 15a string... NO.