Galvanic Isolator Installation on C28

S

SoundHound

Member
Joined
Aug 7, 2016
Messages
16
Fluid Motion Model
R-21 EC
Hull Identification Number
1277880
Vessel Name
Carina
MMSI Number
367789610
I want to install the ProMariner ProSafe FS 30 Amp galvanic isolator on my 2017 C28. For anyone who has installed one of these on their C28, where did you mount it and how did you get to the shore power inlet ground wire?

Thanks,
SoundHound
2017 C28
 
I recall Bellingham Yacht installed one in our 2015 C28 in the small cabinet under the oven. We don’t have the boat any more or I would send you a picture.
 
On our C24/OB I installed a galvanic isolator in the aft port locker, with easy access to the shore power wires coming from the shore power outlet on the port stern. Works great and solved a bad galvanic corrosion problem at our dock.
Slade Cargill
C24 Sojourner
 
I'm installing an Isolator on my 26 Cutwater behind the oven/microwave. The breaker and main line comes in just below the shelf that the microwave sits on. With the Microwave removed it is easy access to install and wire the isolator.
Brian Brown
Cutwater 26
PORT-A-GEE


 
Thanks everyone for the advice. Much appreciated! Does it matters if the GI is installed before or after the ELCI? Any thoughts?
 
I installed the pro Mariner 60 on my C30. The directions said to disconnect the ground from the shore power inlet, and attach that to the isolator. The other terminal on the isolator is grounded to the grounding block, which in my case is fed to a divers zinc on the transom.
 
SoundHound":6xo5obk4 said:
Thanks everyone for the advice. Much appreciated! Does it matters if the GI is installed before or after the ELCI? Any thoughts?
Click to expand...

The GI is intended to stop any stray current flow from the marina grounding wire to the bonding system (the green wires running to each underwater metal item) on the boat. The GI needs to be in the green wire circuit before any other connection of the bonding system. The GI should be installed before the ELCI. You can just disconnect the green wire from the ELCI and extend it over to your GI and then from the GI run a green wire back to the ELCI (where it should continue to the grounding block of the boat.

Curt
 
I'm posting a photo of the ELCI mounted behind cabinet. You will see 3 green wires attached to a terminal block. 1)Line in, 2)Line going into ELCI, 3) load line. Remove Line in off terminal block and attach to Galvanic Isolator Line in side then attach line out of galvanic isolator to the terminal block where you originally removed line in.



I don't have my isolator installed yet. I cut a piece of plywood to mount the isolator to( I am sealing it with resin now). I will thru bolt it to the back board on the shelf that the ELCI is mounted to. There is plenty of clearance for it there.
Brian Brown
Cutwater 26
PORT-A-GEE
 
Brian,

Thank you for posting this information and picture! This is a tremendous help. Of the three green ground wires, how do you know which one is the load line? I will be down at the boat today to see what my options are. I will take pictures of what I'm dealing with. My ELCI is located in the cabinet under the gas stove/oven. I think I will have to pull the ELCI out to get to the wiring.

Thanks again,
SoundHound
 
SoundHound":2rfgo3g9 said:
Brian,

Thank you for posting this information and picture! This is a tremendous help. Of the three green ground wires, how do you know which one is the load line? I will be down at the boat today to see what my options are. I will take pictures of what I'm dealing with. My ELCI is located in the cabinet under the gas stove/oven. I think I will have to pull the ELCI out to get to the wiring.

Thanks again,
SoundHound
Click to expand...
That is where mine is too. I pulled the oven out ( mine is electric) to get at it. Yours should be installed just like this. My wires are marked Line and load. I verified that they were marked correctly 1)closest to port side was line coming from shore power, next ELCI next was load going to breaker panel. You actually don't need to touch the ELCI at all just remove the line wire off the terminal strip, connect that to isolator in and the lead coming out of isolator goes back to terminal strip..
Brian Brown
Cutwater 26
PORT-A-GEE
 
I took a look in the cabinet under the stove. I can see the terminal block with the ground wires. I agree, this would be a great location to mount the galvanic isolator; to the right of the ELCI panel. The stove would have to be removed to gain access, just as you said. The question now is how the heck do I remove the propane stove?

SoundHound
 
Getting the stove out was easy. Open the oven and you will see two screws on each side of the opening. Remove the screws and carefully pull the stove straight out about half of the way. Reach behind the stove and remove the gas hose fastener holding the hose down. Then pull the stove out the rest of the way and set it aside on the floor.

Here's a picture of the installed galvanic isolator. The left side ground is butt connected to the shore power ground. The right side ground goes back to the terminal block where the shore power ground used to be connected.

 
Looks like a good install. I was going to mount mine on the other side of cabinet back. The issue with that is access to testing the isolator. I think I will install it in the same location as you did. It is easier to get to.
 
BB marine":3ah2mgmy said:
I'm installing an Isolator on my 26 Cutwater behind the oven/microwave. The breaker and main line comes in just below the shelf that the microwave sits on. With the Microwave removed it is easy access to install and wire the isolator.
Brian Brown
Cutwater 26
PORT-A-GEE


Click to expand...

Is that flexconduit in the picture? Don’t they rust easily in a humid environment especially saltwater?
 
Good question, I looked at it but never thought to look at what material it is made out of. That is the factory install from Cutwater. It is the electric connection from the Whale stove top. It is in a good dry location, but it could be susceptible to salt air I suppose.
 
gsc3":3fk3wfl3 said:
On our C24/OB I installed a galvanic isolator in the aft port locker, with easy access to the shore power wires coming from the shore power outlet on the port stern. Works great and solved a bad galvanic corrosion problem at our dock.
Slade Cargill
C24 Sojourner
Click to expand...

This is where I was thinking about doing an install this spring on my C28. Hopefully it's just as easy!
 
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