Jimmy60:
It's funny how inaccurate a word like normal can be.When two switches control a single light (such as at either end of a hallway) electricians, here, call them three way switches. Electronics people call them an SPDT.
Not just in the world of electricians does that apply. In the piping world, valves that can route input flow to more then one output port, call them the same way. The piping folks just count the number of port connections that the valve has and if it has 3 it's called a 3 way valve, even though it's designed to have one input that can be routed to either but not both of the two output ports, what electronics call a SPDT switch. It made specifying multi-port solenoid values somewhat tricky for me in my work at a oil refinery, I had to always double check that what I actually required Vs what they named the device were indeed the same thing.
I'm from a 120 volt part of the world, a three way switch is only a few dollars.
I've heard you electrician guys go both ways? Sorry. just an old AC joke.
