On Sun, 25 Jul 2010 00:36:55 -0700 (PDT), Evan wrote:
On Sun, 25 Jul 2010 00:36:55 -0700 (PDT), Evan wrote:
Why not have a correct 20 amp 240 volt NEMA 6-20 outlet installed in
your home ... which is not capable of supplying more power than your
appliance is rated for

I agree with Evan, the right way to power the compressor with the NEMA
6-20P plug (20amp rating), is to hire an electrician to add a dedicated
220V NEMA 6-20R receptacle with a 30 amp dedicated circuit breaker.

Or to have that electrician swap out the existing NEMA 6-20R with a NEMA
6-20R and to swap out the 30 amp breaker with one with only a 20 amp
rating.

However, the cost of hiring the electrician to change the circuit is more
than that of buying a new compressor with, say, standard 110 volt power.

I use the compressor maybe once every six months. Unknowns in the adapter
setup are what I'm asking about here.

The unknowns to overcome by asking this post a
a) How do I test if the NEMA10-30R is on a sub panel or not?
b) Did I select the right pin ground in the NEMA 6-20R receptacle as the
L-shaped neutral in the NEMA10-30P plug?