240 volt (for European washer or big table saw) from a dryer plug
But we almost never use a dryer, so we decided that putting the dryer in the upstairs laundry closet was a waste of valuable closet space (We'll probably install it in the basement later). That means we had the 240 volt dryer plug unused.
The red and black wires are the "hot" wires and connect to the two slots for the flat prongs and the ground connects to ground on the socket. The 240 volt socket doesn't have a neutral, so I just cut that wire short. I didn't worry about trying to insulate the end of the wire because it's just ground (ground and neutral are connected together in the breaker panel)
The cool thing about having a cord like that is that it could also be used to connect a table saw with a 3 hp motor to a dryer plug. I know a lot of people are reluctant to get a bigger table saw because extra wiring needs to be run, but if you plug it into the dryer plug, you won't need an extra socket (unless you frequently use a clothes dryer)
So if you draw more than 15 amperes, the breaker won't pop (it will however pop for a short circuit). You won't overload the wiring in the house, because that wiring is made to carry that kind of load, but you may end up overheating the power cord to your saw, or the plug (though, much more likely, the thermal protection in the saw's motor will trip first).