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Old 01-12-2014, 09:44 PM   #1
3 Rivet Member
2011 28' Flying Cloud
Orillia , Ontario
Join Date: Aug 2006
Posts: 120
Running New battery cables (Extras)

I have a 2011 F C and want to run two more number 4 cables from the battery box into the trailer has any one else done this through existing harness. I can't look at mine now to see since it is being stored 3 hours away.

Thanks George
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Old 01-12-2014, 09:56 PM   #2
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1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
My 2014 20' FC already has two sets of #4 from the battery box to the interior, under the front bed. One set is for the coach power, the second for the inverter power.

When I pulled in a phone wire sized cable for the Tri Metric meter I installed I was able to go through the same entry point as the cables, but it was not easy. Now, if the hole were the same size as mine, but there had been no second set of #4's for the inverter, it would have been a piece of cake. So, not knowing what you have now probably limits the usefulness of my comments. But it is the best I can do.
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Old 01-12-2014, 10:40 PM   #3
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2012 25' FB Flying Cloud
Join Date: Sep 2003
Posts: 74
To set up your Trimetric your have to install a shunt in the negative cable. This would mean combining the negative cable for the inverter and power into one cable. At least those are my thoughts since I will be making this installation this on our 2012 25FC FB in a couple weeks.
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Old 01-13-2014, 12:30 AM   #4
Rivet Master
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
Yes, all the power from the negative side of both sets of cables in my 20' FC now goes through a shunt on top of the batteries. The cables were there from the factory installation of the inverter and from the factory "normal" 12 volt system. All I did was add the shunt and the wiring to it, plus I got my 12 volt power for the tri metric through a fuse on the positive side of the batteries. I used a phone wire type cable which had 6 wires in it, I used 4 of them.
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Old 01-13-2014, 03:46 AM   #5
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2012 25' FB International
Trent Woods , North Carolina
Join Date: May 2013
Posts: 3,087
The hardest part of what you want to do is penetrating the sealant that Airstream uses in the sealant around all of the cables. You can drill through it, but you need to be careful about the existing wires.
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Old 01-13-2014, 06:35 AM   #6
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Vintage Kin Owner
Naples , Florida
Join Date: Dec 2005
Posts: 7,411
The Airstream factory uses SikaFlex 221 to seal the holes in the floor where the battery cables enter the trailer. The easiest way I have found (I run very large cables directly to the batteries when installing solar charging systems and/or inverters) is to completely remove the sealant if you want to run new cables (or any other type of wiring) thru these holes. It's a simple job to replace the sealant, and it will adhere nicely over itself if you happen to leave any residue when initially removing it.
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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