Originally Posted by jCOSbrew
If you have a main power input contactor you can use the e-stop and ON/OFF switch to enable/disable this contactor coil.
I know. I like the idea of killing ALL power to the box when I hit the E-stop button though so I think I'm going to wire it to just kick over the GFI circuit in the spa panel anyway. (I don't plan on hitting that button and if I do hit it, I'm going to really mean it.)