Review on JMAF Mushroom Safety Switch for Emergency Situations by Kevin Woods

Switches worked well for my application. Each switch can be used as normally open or normally closed (or both). To disable the switch once pressed, simply turn the knob clockwise and it will appear. Assuming typical use of an "emergency stop" switch, the orange side of the switch is normally closed (off when pressed) and the green side is normally open (on when pressed) when the pressed state is "OFF". " is. I personally wouldn't trust it at 660V (intended rating), but it works well with small DC voltages.