In article , Robert Casey says...
...
There's a serious shock hazard here. If you have a load plugged in
its 220V socket and turned on, and you pull out of the wall one of
the extension cords, you will have a male power plug with a hot prong
waiting to shock you. ...

Not necessarily. There is an interlock built into it. They say " [its]
safety interlock blocks all power to the 220 volt outlet until
electrical connections are complete and correct." Probably is a relay
since it consumes 4w.

Bob