Should the bilge pump float switch be installed in the positive or negative conductor?
A. The positive conductor. The placement of the switch takes into consideration the possibility of stray current corrosion. With two electrical components in the bilge water, it is best to minimize the number of components that carry the voltage continuously. With the switch in the positive conductor, the pump only sees the voltage when the switch is activated. This helps reduce the effects of stray current corrosion should the pump become damaged.
