GFI failure rate on boats

[vpbarkley]

We've had two GFIs fail on our boat, each GFI was less than one year old.

The failures happened months apart and on different circuits.

There were no other electrical failures on the boat in this time period.

Sometimes a GFIs would switch off sometime between switching off shore power and later switching onto generator power. It would require a reset but this doesn't surprise me.

How often have you had to replace GFIs on your boat? Thank you.

[Turtle Blues]

While 2 in short succession suggests you should be checking grounding verses neutral and bonding the fact that you plug into shore power without a major fault would indicate that the plugs may be the culprit.
There is no real marine gfi simply repackaged residential grade outlets.
A half step better is a MR rated outlet *stamped on face) full step is industrial/hospital quality (green dot on face).
Also switching the shore/genset switch with a load on the circuit can be enough interruption to trip the gfi.

[GordMay]

What Causes GFCI Receptacles to Go Bad?
➥ https://www.fluke.com/en-ca/learn/bl...ected-circuits

[Lake-Effect]

Originally Posted by vpbarkley

We've had two GFIs fail on our boat, each GFI was less than one year old.

How did they fail? Or what are they doing that leads you to say they failed?

[smac999]

I,ve seen a couple bad ones out of 1000’s of boats...

Very rare.

[foufou]

Average GFCIs are notoriously unreliable. In over thirty years of installing those mostly in houses and a few on boats I have replaced dozens. the units I replaced were faulty as merely replacing them fixed what at first glance seemed like a ground fault. The new units did not trip. There was reference to higher quality units in a post above but I have never encountered those at the electrical equipment supliers.

[Martkimwat]

As a Brit, I'm not familiar with the term 'GFI' or 'GFCI', could someone enlighten me, please?

[waterman46]

Originally Posted by Martkimwat

As a Brit, I'm not familiar with the term 'GFI' or 'GFCI', could someone enlighten me, please?

You lot call 'em RCD's ! They are Ground Fault Circuit Interrupters.

[Emmalina]

Originally Posted by waterman46

You lot call 'em RCD's ! They are Ground Fault Circuit Interrupters.

Or ELCBs Earth Leakage Circuit Breakers !

[goboatingnow]

Originally Posted by waterman46

You lot call 'em RCD's ! They are Ground Fault Circuit Interrupters.

GFCI is a deprecated term in Europe as a ground fault is not the only thing that can trip them.

Round here they are extremely reliable devices. Electricians almost never replace them.
Clearly the ones in the US are crap

[redneckrob]

Originally Posted by foufou

Average GFCIs are notoriously unreliable. In over thirty years of installing those mostly in houses and a few on boats I have replaced dozens. the units I replaced were faulty as merely replacing them fixed what at first glance seemed like a ground fault. The new units did not trip. There was reference to higher quality units in a post above but I have never encountered those at the electrical equipment supliers.

I've had even worse luck with the combined arc/ground fault breakers, they're like 50/50 within a year out of a dozen I've installed. Put a new one in and the fault goes away, so definitely a bad breaker.

[waterman46]

Consider using GFCI rated for outdoor use since basically a boat is a very wet and humid place:



https://www.homelectrical.com/which-...d-where.6.html

[Martkimwat]

Aah, a reverse current detector (RCD).. Thanks :-)

[kish]

Originally Posted by Martkimwat

Aah, a reverse current detector (RCD).. Thanks :-)

No, it is a Residual Current Detector
Residual current is current that flows in the Line but not in the Neutral conductor as it leaks to ground elsewhere.
RCD units in Europe and UK are rated to trip at 30mA phase to neutral imbalance.

[Montanan]

Originally Posted by Martkimwat

Aah, a reverse current detector (RCD).. Thanks :-)

No reversing of current going on.

RCD = Residual Circuit Detector = Ground Fault Circuit Interrupter.

An RCD is the same as a GFCI, [but the RCD is found on Lorries that only operates on the improper side of the road ].