You may see it for a window air conditioner in
a home or an air compressor in a shop. I put
them in for refrigeration units. The receptacle
does not have to be the single 20 amp 120 volt
type, it could be a standard duplex receptacle
if you want to change it. The 20 amp 120 volt
single actually looks like the one on this page,
it's a NEMA 5-20R:
firstname.lastname@example.org (Charles Bishop) wrote:
Yes -- the type you show below.
Exactly so. If a 20A circuit has only one outlet, it must be a 20A outlet as
shown. Note that a duplex receptacle is considered to be two outlets, and thus
a 20A circuit is permitted to have a single 15A duplex receptacle.
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