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Old 05-11-2022, 07:21 PM   #1
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Reversed Polarity on House Battery

I have a 2015 Greyhawk and last time we went camping I needed to change the house battery last minute. Being in a rush I crossed wiring on the battery. I was able to change the reverse polarity fuses, and the fuse behind the house battery, but now the thermastat and inverter aren't working. I checked the fuse in the thermastat, changed out the control box in the A/C, but still nothing. Does anyone know what it can be? I heard the inverter might have a reset switch on it, I will try that when I find the inverter.
Thanks
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Old 05-11-2022, 07:27 PM   #2
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I'm going to take a guess that you might have the same Inverter that I do, since we're close in years. I'm in a 2016.


Mine's a Xantrex 1000 like this:


https://www.xantrex.com/documents/Po...-01_Rev-A).pdf
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Old 05-11-2022, 07:28 PM   #3
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check the furnace fuse the a/c may be connected to it. Your inverter may be under a false panel under the bed.
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Old 05-12-2022, 03:31 AM   #4
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Arrrg! Why does Jayco use black wires for both the positive and negative battery cables?

Like many others on this site, I sprayed the positive cables with red spray paint to avoid what unfortunatly happened to the OP of this thread.
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Old 05-12-2022, 07:23 AM   #5
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We all learn these lessons: Always take a picture And mark each wire with a tag where it came from.

If a terminal has multiple wires, tie wrap them together.
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Old 05-12-2022, 11:18 AM   #6
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Basic electrical 101: label everything before disconnecting anything.
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Old 05-12-2022, 12:27 PM   #7
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Basic electrical 101: label everything before disconnecting anything.
And I take a picture or 2 as well....Just in case and it has saved me lots of time
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Old 05-12-2022, 02:49 PM   #8
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Jayco is backwards of residential colors. Probably get a lot of service work from doing it that way.
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Old 05-12-2022, 03:57 PM   #9
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Jayco is backwards of residential colors. Probably get a lot of service work from doing it that way.
Not Jayco, it's the industry.
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Old 05-12-2022, 07:46 PM   #10
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Jayco is backwards of residential colors. Probably get a lot of service work from doing it that way.
Black is the hot wire in Jayco's and in residential usage, white is neutral. What is it in regards to colors that you are saying is backwards? ~CA
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Old 05-12-2022, 08:17 PM   #11
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In DC red wire is positive and black is negative.
In AC black is positive and white is negative.
If yours has a black wire for a positive to a battery, the tech must have been color blind, excuse me, color challenged to be politically correct.either switch out that wire from point A to B or simply wrap it in red electrical tape. The latter is gonna be easier and cheaper.
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Old 05-13-2022, 04:31 AM   #12
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In DC red wire is positive and black is negative.
In AC black is positive and white is negative.
If yours has a black wire for a positive to a battery, the tech must have been color blind, excuse me, color challenged to be politically correct.either switch out that wire from point A to B or simply wrap it in red electrical tape. The latter is gonna be easier and cheaper.
This.
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Old 05-14-2022, 12:16 PM   #13
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Lets get two things straight.
1. DC systems do not have a "neutral" they have a negative.
2. AC systems do not have a "negative" they have a neutral.
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Old 05-14-2022, 12:39 PM   #14
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I'll agree with ya on that.
AC systems also have a ground that's tied into the neutral.
DC systems can also have a tip and ring.
Lol!!!
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Old 05-14-2022, 01:33 PM   #15
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Lets get two things straight.
1. DC systems do not have a "neutral" they have a negative.
2. AC systems do not have a "negative" they have a neutral.
You are correct. Thanks for clearing up some other posts.
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Old 05-14-2022, 02:35 PM   #16
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Not too mention in addition to the above comments, AC systems do not have a "positive" wire (which is why I used the term "hot" wire and sometimes I have heard people call the hot wire the "live" wire). I had thought to share what Vicr shared above but decided not to as sometimes a little knowledge can be more dangerous than none at all. AC current is called AC because the polarity "alternates" from positive to negative, and does everyone know how often it alternates? 60 times per second is the US standard aka 60 cycles per second aka 60 hertz.

If you have a common 120v RV power tester and if it indicates "Reverse Polarity" what it is indicating is that the hot wire and the neutral wire are reversed which most commonly means that the black and white wire in the outlet you are connected is is reversed (or somewhere along the path), not that you have a positive and negative wire that is reversed as can be the case on the 12v system.

I highly recommend not to do any work on the 120v side if you are unfamiliar with working with AC current, at least not when any power on the 120v side exists. The 12v side is less dangerous, but still yet if you short out your 12v battery to the ground, and if that short was due for example because the ring on your finger contacted the battery + post and perhaps a metal frame around the battery (ground), then you certainly could lose that finger (or at least have severe burns), so be careful. In fact it is best not to have any metal jewelry (rings, metal watch band, chains, bracelet, etc.) on when working with electricity. ~CA
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Old 05-15-2022, 11:49 AM   #17
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I'll agree with ya on that.
AC systems also have a ground that's tied into the neutral.
DC systems can also have a tip and ring.
Lol!!!
On a typical residential (with no transformers) AC system the neutral can only be bonded to the ground at the main service. Any panels down stream from the main service the neutral is not bonded to the main service.
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Old 05-15-2022, 05:51 PM   #18
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X2.
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Old 05-16-2022, 03:51 AM   #19
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In any case (you all are correct), DC "+" should be a red wire/cable, and DC "-" should be a black wire/cable.

And to the old telephone techs out there: blue, orange, green, brown, slate.
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Old 05-16-2022, 11:30 AM   #20
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And to the old telephone techs out there...

That reminds me if someone wants to see a *real* battery bank, walk into a large CO some time.


I hit the big one in Denver and their battery room was twice the size of my house.
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