At 06:25 PM 11/16/2015, you wrote:

>If a switch has more than "on" and "off" positions such as a "center 
>off", then neither the "NC" or "NO" contacts are connected to the 
>common terminal in the "center off" position.

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That's not exactly right.  A switch like that will not be labeled 
with "NO" and "NC" but would have a "common" terminal and then other 
contacts just "numbered".  Use an ohm meter to determine which 
contacts are connected to "common" in any switch position, be it 
rotary switch, toggle switch, or any multi-position switch.

Larry Flesner 


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