Fireman's switch fireman's switch is a specialized switch that allows firefighters to quickly disconnect power from high voltage devices that may pose a danger in the event of an emergency. According to the Institution of Electrical Engineers , any electrical device operating at over 1,000 Volts AC or 1,500 volts DC , must be equipped with the switch .meet the following standards: It must isolate all live conductors. Only one switch should control the entire exterior and a second switch control the interior. The switch should be red and be fitted with a nameplate saying "FIREMAN'S SWITCH". The ON and OFF positions for the switch must be clearly indicated and visible to someone standing on the ground . Additionally the OFF position must be on the top , this is to help prevent accidental movement to the ON position. The switch must be in a clearly visible location , not more than from the ground . For exterior devices, the switch should be adjacent to the controls for the devices. Interior switches should be adjacent to the main entrance to the building.
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