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Author Topic:   Float Switch Wiring
boatpwr posted 07-21-2010 02:05 AM ET (US)   Profile for boatpwr   Send Email to boatpwr  
My Seachoice brand float switch has two identical brown wires. My bilge pump has a brown wire connected by a wire nut to a brown wire, and a black wire connected to a white wire by wire nut. Do I connect one brown wire to the two brown wires, and the other brown wire to the black wire, thereby leaving three brown wires connected in one wire nut and a black, white, and brown wire connected by the other wire nut? Thanks. boatpwr
jimh posted 07-21-2010 08:22 AM ET (US)     Profile for jimh  Send Email to jimh     
Describing electric circuits in a narrative manner makes it extremely difficult for the reader to follow. Schematic diagrams were developed as an alternative to narrative description of electrical circuits.

I can't really tell much about your boat wiring from your narrative, but my best inference is that your proposal is bad and won't accomplish anything useful other than perhaps blowing a fuse when the float switch closes.

In order for a switch to control the flow of current in a circuit you have to wire the switch in series with the current flow. Your proposal, and again because I may be completely misunderstanding your proposed circuit due to it being presented as a narrative of wires and colors, appears to me to wire the float switch across the current source, in parallel with the load, and, if the switch closes, the current will be shunted by the switch, blowing the fuse or tripping a circuit breaker.

I have an article that describes how to wire a float switch, a pump, and a three-position control switch for AUTO-OFF-MANUAL operation. The article also discusses important aspects of locating the float switch in the sump in order to permit the float switch to properly regulate the pump. See

http://continuouswave.com/whaler/reference/bilgePump.html

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