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Old 09-11-2018, 09:32 PM   #21
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MY converter is identical and that breaker is labeled WATER HEATER.
Mine looks like that too in my ACE. They all look like that in a 30 Amp rig. Since your coach is not the same then a comparison is no help.

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Old 09-11-2018, 10:23 PM   #22
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I just requested and received all drawings for my coach from Thor. That unlabeled breaker is supposed to be the water heater, but I checked it previously and with it off the water heater still fired up on generator electric. I'll have to check it again although being wired incorrectly is not out of the realm of possible.
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Old 09-11-2018, 10:24 PM   #23
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Have ou found that a different breaker shuts off the water heater?
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Old 09-11-2018, 10:27 PM   #24
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Not unless it's on the AC breaker. Maybe I was wrong when I had the unlabeled breaker turned off and the 12v relay kicked on from the panel switch but not the actual water heater 120 element.


I know for a fact that unlabeled breaker does control a fan inside the converter panel though. I'll look again tonight - very intrigued now.
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Old 09-11-2018, 10:56 PM   #25
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Not unless it's on the AC breaker. Maybe I was wrong when I had the unlabeled breaker turned off and the 12v relay kicked on from the panel switch but not the actual water heater 120 element.


I know for a fact that unlabeled breaker does control a fan inside the converter panel though. I'll look again tonight - very intrigued now.
That would imply its powering the 120V -> 12V converter.
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Old 09-11-2018, 11:04 PM   #26
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Maybe the breaker labeled converter is mislabeled and that's actually the water heater.
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Old 09-11-2018, 11:28 PM   #27
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...but I checked it previously and with it off the water heater still fired up on generator electric...
the only time I can hear my water heater is when it is on PROPANE.
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Old 09-13-2018, 05:34 AM   #28
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My last assumption was correct. The breaker labeled converter is in fact the water heater and the unlabeled breaker is the converter. Obviously this does not match the drawing I received from Thor.

I took the panel off again and saw that the unabled breaker has a two wire split coming out of it with the other wire capped off. I missed this the first time I took the panel off (see photo).

Why would they run two wires out of that breaker and then just cap it off? Is there any difference on the full size breaker used in the last slot compared to the smaller breakers used above that? Is this going to cause any problems for me down the road/should I swap the wires between the two breakers?
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Old 09-13-2018, 11:46 AM   #29
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I'm glad to hear that you solved the mystery!
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Old 09-13-2018, 01:05 PM   #30
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Not unless it's on the AC breaker. Maybe I was wrong when I had the unlabeled breaker turned off and the 12v relay kicked on from the panel switch but not the actual water heater 120 element.
I know for a fact that unlabeled breaker does control a fan inside the converter panel though. I'll look again tonight - very intrigued now.
Thor only does one wiring harness for each floor plan. The coach is wired for all options even if they are not installed. The only exception is when there are 30 and 50 amp versions of the same floor plan.
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Old 09-13-2018, 02:41 PM   #31
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True, but this is not an instance of that. They did not wire the breakers per the electrical drawing.


Most likely someone just messed up or a wire was too short or similar, but I'm curious as to why they would run the dual wire out from the last breaker and cap it.
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Old 09-13-2018, 10:08 PM   #32
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I wonder if your coach has some 'option' available that was not ordered on your unit...
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Old 09-13-2018, 10:17 PM   #33
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Well he DID get the "Mis-labelled Circuit Breaker" option... -
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Old 09-14-2018, 06:01 PM   #34
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Appreciate everyone's input on this, but it looks like I've figured it out. I tracked down the manual for my converter and the wire split comes like that from the factory so you can branch a circuit off the same breaker used for the converter.


Now that I know that this seems to be nothing more than the breaker order not matching Thor's drawing.
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Old 09-14-2018, 06:06 PM   #35
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that seems a little 'odd', though, as the factory could have, and should have, easily provided a 'tandem' 15a/15a twin breaker, just like the others, leaving one side with no outgoing wire.
With it the way it is now, you have a LIVE wire floating around in the box!

very strange
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Old 09-14-2018, 06:22 PM   #36
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Yes, sorry I don't mean Thor's factory, I mean the WFCO factory that makes the converter.


With that said, Thor's factory could have easily cut the split and just ran the single wire. If you're not going to use it to spawn another branch circuit I agree just capping and taping it is not the best option.
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