Rule-A-Matic Plus Float Switch With Fuse Holder | Rule 40FA Float switch works with non-automatic bilge pumps to activate pump when bilge water level reaches 2 in. & shuts pump off when water level reaches 3/4 in. Rule 40FA Rule-A-Matic Plus float switch Automatic on/off control switch for 12, 24, or 32 volt DC electric bilge pumps or alarms Removable base for easy installation and cleaning Impact resistant cover keeps debris out preventing float from jamming Environmentally responsible mercury free design Features 28 in. abrasion resistant 14 AWG marine grade blocked wire Mounting screw provision in base For use with bilge pumps drawing up to 20 amps 20 amps maximum rating @ 12 volts DC 10 amps maximum rating @ 24 volts DC 6.5 amps maximum rating @ 32 volts DC Includes fuse holder Requires appropriate size fuse for the bilge pump ISO 8846 marine ignition protected 4 7/8 in. length 2 1/2 in. width 2 3/4 in. height 2 year manufacturer warranty Replaces Rule 40F