Hi,
I got a 220v Shop Fox DC remote control, the $38 stuff from Grizzly.
It is not a long ranger. On curiosity I opened up the unit and the
first thing I noticed is that one of the phases going straight to one
outlet pin of the NEMA 6-20 receptacle. The other phase is controlled
by the relay and a small PCB.

So, when the unit is in OFF position but powered by the mains supply,
one of its NEMA 6-20R is always live! Before hooking it up to
anything else I checked my suspicion and it is true. Between that
live phase and ground I got 120v as expected. Between both the phases
there is 0v when the unit is in OFF position.

When the DC is turned off by this remote I dare not touch any
electrical part of that motor...even though the box clearly says it is
"remote control switch". My idea of a switch was a little more on the
safer side. How would you like your table lamp to be on live side of
the switch?
Is this a norm for 220v stuff or am I missing something? Are all
remote controls for 220v DCs like that? I believe PennState has it
too.
Regard.
kp.