Classic R29 OR R31 120-Volt System Wiring Diagram

S

SkookumR29

Well-known member
Joined
Nov 25, 2019
Messages
81
Fluid Motion Model
C-288 C
Hull Identification Number
FMLT2902D011
Non-Fluid Motion Model
Gig Harbor Boat Works Melonseed
Vessel Name
Skookum
MMSI Number
367489440
Has anyone come across a wiring diagram for the 120-volt power distribution? Our boat is a 2011 R29 sedan without generator. I have all the original wiring diagrams that the RT Factory posted years ago, but they only cover the 12-volt distribution. I have a few items I would like to confirm on the 120-volt side.
 
Thank you, Brian.

I see that this diagram has a 2018 rev date; probably similar to how they configured the older boats, but I'm sure they have updated a few means and methods since 2011. For instance, our boat did not have a main disconnect at the shore power entrance, which is located on the starboard side just forward of the helm side door; nor did it have an ELCI breaker. The ELCI code requirement was just working its way into the mainstream at that point and FM must not have been on board. 120-volt power was led straight from the back side of the shore power plug assembly all the way back to the 120-volt panel and main breaker just inside our main cabin door. I since have added an ELCI breaker and galvanic isolator, but unfortunately there was no practical way to keep those devices within 10 feet of the shore power connection - probably not a lot more than 10 feet though.

The factory did such a nice, detailed job on the 12-volt diagrams on the early 29's - I have only found a few discrepancies on my boat - it's too bad they did not also do a 120v diagram. If nobody else has an older diagram, I'll just do a little research and create my own using the one you forwarded as a starting point.
 
I agree the 120 V wiring diagram is a bit weak. But after a few trips around the electrical system it can be figured out. It is just a three wire system. Depending if you have Air it is either a single 30 amp or two 30 amp. The placement of the isolator is not so much the distance as it is the first break in the ground. It doesn't matter if it is 2' or 10' as long as it is the first break. The same with the ELCI. I guess theoretically there could be an issue in the triplex boat cable Hot and neutral between the shore power receptacle and 10' of cable before the ELCI but unlikely. The basic rule is really first break or connection.

The best way to learn the electrical is trace the system down. This is a good time to make notes and your own diagram of what you have. At the same time inspect all you connections confirm clean and tight. I did this on my C26 and found a few discrepancies. Not bad but issues that would have caused problems in the future. The more you go over the wiring and tract down the circuits the easier it is to maintain and troubleshoot if there is an issue.

The 12 Volt system is illustrated nicely. It is also much more involved.
 
Agree with all - thanks.
 
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