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ContinuousWave: Small Boat Electrical
Bilge Pump Wiring
|Author||Topic: Bilge Pump Wiring|
posted 10-08-2006 10:53 PM ET (US)
I want to install a bilge pump on my 1990 Montauk., and I need advice on which pump to buy. My battery is in the transom. I have an accessory switch that curently is used for the gps--not my idea. I also will need to buy the [hose] to the splash well. I need to know how to wire it too--of course!
posted 10-08-2006 11:17 PM ET (US)
The Rule 500 will fit down there. Get the automatic version
that will try for a couple of seconds, and if it doesn't
detect a load, stop.
Get tubing that is smooth on the inside -- it makes a
Wiring. The pump will have two wires. One goes to ground
Accessory IS for stuff like GPS.
Be sure to use a fuse.
Be sure to use Ancor marine grade wire and connectors. The
I'd put the switch on the console
posted 10-09-2006 09:22 AM ET (US)
Thank you, Chuck.
Great advice, especially about the smooth tubing!
posted 10-09-2006 10:07 PM ET (US)
Usually the pump manufacturer will include a schematic diagram for the proper wiring of the pump and any associated float switches and control switches. There is also an article in the REFERENCE section which shows in detail how the typical sump pump was wired in classic Boston Whaler boats. See:
Cockpit Sump Pump
posted 10-13-2006 03:18 PM ET (US)
It's not as important on an unsinkable boat, but a bilge pump should always be wired in such a way that it still has power even when the main battery switch is turned off, and should have a three position switch independently controlling it. This switch should have an off, auto, and intermittent on position. Since it is not run through the main power switch like everything else, it needs to be independently fused, (close to the source), and the wiring needs to be inspected regularly.
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