Redsy,
I've never seen a Class 1 Div 1 motor with the intenal temperature switch. I have seen a number of Class 2 Div 1 motors with the internal temperature swich, and on those we wired the switch in seires with the stop button.
Walrus,
The flash point is not the ignition point. The flash point is the temperature at which the liquid will give off enough flammable vapors to support a "flash" fire. The ignition point is hundreds of degrees above the flash point for most materials.
Don
