Wow this is all very confusing, I am glad I do not have to wire these I would be lost.
This further confuses me.
factory wired with a cord, 120 volts , 20 amp circuit required. The unit is convertible to 240 & the instructions call for hard wiring, no cord at this voltage.
I am missing the logic here, 120 or 240 still 120 volt to ground.
Why is one treated different from the other?