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Old 06-21-2014
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Idea for safety, 120volt bildge pump

So I have been wiring up my new generator, 3.5KW phasor, and I started thinking..
If I ever had a major leak The first system to go down would be 12 volt. the starter cannot be more then 12" from the bottom of the bilge. the batteries are just above that. So its a real chance if your taking on water, you may lose your 12 volt system. The plus side on our boat is our 120 volt is all run in the ceiling. The lowest part being the panel itself, 3' above the bilge.
My generator has a hand crank to start it, if the battery is dead, but if the 12 volt is down, it will not help to have it for the few minor things that run on 120volt. So why not have a 120 volt bilge pump, one, in case of major leaks, two, if you wake up to dead batteries, and have a leak of any kind?
I cannot be the first with this idea. Thoughts on the subject?
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Old 06-21-2014
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Re: Idea for safety, 120volt bildge pump

Quote:
Originally Posted by UnionPacific View Post
So I have been wiring up my new generator, 3.5KW phasor, and I started thinking..
If I ever had a major leak The first system to go down would be 12 volt. the starter cannot be more then 12" from the bottom of the bilge. the batteries are just above that. So its a real chance if your taking on water, you may lose your 12 volt system. The plus side on our boat is our 120 volt is all run in the ceiling. The lowest part being the panel itself, 3' above the bilge.
My generator has a hand crank to start it, if the battery is dead, but if the 12 volt is down, it will not help to have it for the few minor things that run on 120volt. So why not have a 120 volt bilge pump, one, in case of major leaks, two, if you wake up to dead batteries, and have a leak of any kind?
I cannot be the first with this idea. Thoughts on the subject?
It will work fine..
Get a submersible pump like one of these.
Submersible Utility Pumps | Water Pumps | Northern Tool + Equipment

It don't need to salt water resistant if you only intend to use it in emergency.
Store it out of the bilge water and drop it in where needed.
Make sure you have space to drop the pump down where it will get hold of water.

Around here pumps like these get used a lot in the spring when launching old wooden boats that tend to leak before wood starts swelling.
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Old 06-21-2014
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Re: Idea for safety, 120volt bildge pump

120 volt and rising water....with theoretical gnds...maybe none

humans involved...could cause some problems in keeping the two systems separated, as when they mix, generally the human loses
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Old 06-21-2014
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Re: Idea for safety, 120volt bildge pump

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Originally Posted by kd3pc View Post
120 volt and rising water....with theoretical gnds...maybe none

humans involved...could cause some problems in keeping the two systems separated, as when they mix, generally the human loses
The 120 is so far above the bilge that the boat will be under before it hits the 120. The generator and the 120 panel are at the same level.
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Old 06-21-2014
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Re: Idea for safety, 120volt bildge pump

What if you step the 120V down to 12V or 24V and have a second 12V circuit/backup pump?

Josh


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Re: Idea for safety, 120volt bildge pump

The main advantage of the 120 system is that it will move a greater volume of water and this sounds like a scenario where you are dealing with volume...
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Old 06-22-2014
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Re: Idea for safety, 120volt bildge pump

We carry 3, 1/2 hp 110 volt ac submersible pumps (each pumps up to 2500 GPH), as well as several 12 volt bilge pumps. They attach to garden hoses, so we need no special hoses aboard, and if needed, they would also run off the inverter.
We would need about 7' of water aboard before it became a problem with the 110 volt service, and about the same for the 12 volt.
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Old 06-22-2014
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Re: Idea for safety, 120volt bildge pump

Well, if it's a 120 v submersible pump, your 120 v wiring will be in the bilge water.
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Old 06-22-2014
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Re: Idea for safety, 120volt bildge pump

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Originally Posted by ggray View Post
Well, if it's a 120 v submersible pump, your 120 v wiring will be in the bilge water.
Really, don't you think they are designed for that? They are not installed; they are portable.
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Re: Idea for safety, 120volt bildge pump

You go ahead and stand in water with 120v wires in it. I'll watch.

I'd say when you are in dire straits with water over the floorboards and everything rolling and flying about, you don't need anything else to worry about.

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Really, don't you think they are designed for that? They are not installed; they are portable.
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