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post #1 of 36 Old 06-04-2013 Thread Starter
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EFI Outlet in cockpit.

Not an electrician and learning so go easy on me.

I have numerous 110 outlets on the boat that work under shore power or when the inverter is engaged. All of that works swimmingly.

I had a standard outlet in my cockpit (mind you she's a big 50' boat with a center cokpit and high freeboard) that I thought would be safer with an EFI outlet like one has outdoors on in the bathroom.

Oddly, it works as it should under shore power but does nothing under the inverter or generator (does not work away from shore power). I've tried 2 EFIs. Should it work? Is it something to do with the ground of the boat and shore power?

Just looking for some insight. Thanks!

~Scott


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post #2 of 36 Old 06-04-2013
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Re: EFI Outlet in cockpit.

Scott, are there other GFI's on the circuit? Sometimes putting more than one on the same circuit can cause one or both to fail (DAMHIKT). Another possibility is that the inverter is noisy and the GFI is sensing the noise and that's what is tripping it.

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post #3 of 36 Old 06-05-2013
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Re: EFI Outlet in cockpit.

It seems likely to me that the inverter isn't hooked up correctly and that the ground and neutral aren't connected when the inverter is on.

BE CAREFUL messing with this stuff. Getting it right with multiple power sources has bitten people.

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post #4 of 36 Old 06-05-2013 Thread Starter
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Re: EFI Outlet in cockpit.

No other GFIs on boat at all. That is the only one.

Inverter is the super size - Xantrex Freedom SW3012 12V 3000W Inverter/Charger -. Had it professionally installed.

So likely then the ground and neutral? I'll have the guy check his work if so.

Thanks.


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post #5 of 36 Old 06-05-2013
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Re: EFI Outlet in cockpit.

This might be helpful to you when diagnosing the problem:

How GFCIs Work | content content from Electrical Construction & Maintenance (EC&M) Magazine

- Jim
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post #6 of 36 Old 06-06-2013
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Re: EFI Outlet in cockpit.

Quote:
Originally Posted by SVAuspicious View Post
It seems likely to me that the inverter isn't hooked up correctly and that the ground and neutral aren't connected when the inverter is on.

BE CAREFUL messing with this stuff. Getting it right with multiple power sources has bitten people.
Ground and neutral are connected/disconnected automatically inside the inverter. No setup option can change this.

To the op:
Using a multimeter - carefully - measure whether there is actually voltage at the outlets when on inverter or generator.

Brian
Living aboard in Victoria Harbour
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post #7 of 36 Old 06-06-2013
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Re: EFI Outlet in cockpit.

If I've got this right, all the other receptacles on the boat will power up with the invertor/genset, other than the one in the cockpit.

First, its not uncommon that an invertor only powers some circuits and not others. More often this is because of capacity. In the OP's case, I'm betting a nickle the electrician intentionally excluded a 110v outlet in the cockpit, assuming one may not want live 110v power in a wet environment while underway. Keeping it out of the circuit would prevent someone below from throwing a switch that ruined the cockpit crew's day.


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post #8 of 36 Old 06-06-2013
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Re: EFI Outlet in cockpit.

Quote:
Originally Posted by mitiempo View Post
Ground and neutral are connected/disconnected automatically inside the inverter. No setup option can change this.

Not true. My Mastervolt invertor does not make the connection between ground and neutral. The connection is made by the power selector switch between shore power (connection ashore), generator (connection at the generator), and inverter (connection at the switch).

The OP didn't give us a make or model of inverter.

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post #9 of 36 Old 06-06-2013
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Re: EFI Outlet in cockpit.

When on inverter/generator power, does the GFCI trip or does it not have power?
Did the old, non GFCI, receptacle work with the inverter?
Does the GFCI receptacle work when powered by shore power?
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post #10 of 36 Old 06-06-2013
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Re: EFI Outlet in cockpit.

Quote:
Originally Posted by SVAuspicious View Post
Not true. My Mastervolt invertor does not make the connection between ground and neutral. The connection is made by the power selector switch between shore power (connection ashore), generator (connection at the generator), and inverter (connection at the switch).

The OP didn't give us a make or model of inverter.
Not all inverters are the same. Some have automatic switching between different power sources. So it could be true.
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