In sci.electronics.design Chris W wrote:
The problem with that is, someone might find the cable with the switch
and plug on the end, wonder what it does, plug it in and flip the switch.
Best case, they trip a breaker, worst case something starts on fire.

How much current does the switch have to handle? If it's just a few
amps, you might put an inline fuse in the cord to the switch. If
anybody plugs it into the wall and flips the switch, the fuse probably
blows before the breaker.

You could use the type of connector that is on computer power cords.
Something like a Digi-Key Q223-ND ($1) on the control box, and a Q216-ND
($7) on the end of the switch cord.

You could go for the old-time look with a Jones connector. Mouser
538-23023 ($1.50) on the control box and 538-13021 ($2.50) on the
switch cord.

Matt Roberds