Keyed AC socket and plug? Pins on the plug I'm talking about are...
slightly curved, and laid out in a circular pattern.
Can't remember what they're called. Plug in and twist. Locked!
A bonus is that the socket is so wierd...
Michael

Same thing I thought of
(because I used one for a switch on a break-it-down-easily system).
http://www.hubbellnet.com/max_htm/te...NEMA/ml_2p.htm