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Old 06-08-2016, 03:31 PM   #11
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Quote:
Originally Posted by TGR View Post
My trailer came with a power disconnect switch on the positive terminal that serves me well. It doesnít disconnect my slide out motors, landing gear nor rear stabilizer but it does turn off all my parasitic draws. If I were to add a battery cutoff switch, I would put it on the negative side of the battery for the same reasons you should disconnect the negative battery post first when removing a battery.


A wrench or tool accidently touching the negative terminal to ground on an installed battery has no effect. After first disconnecting the negative terminal of the battery, shorting the positive terminal to grounded trailer parts with your wrench also has no effect either because the negative terminal is open. On the other hand, accidentally shorting the tool to ground, while disconnecting the positive battery terminal first, can cause a large spark.


This may not be a major concern but it is the reason many advocate putting the battery disconnect switch on the negative terminal instead of the positive one. In either case, the battery is electrically disconnected from the trailer.

I'd also note that the SIZE of the positive and negative terminals is slightly different and the popular TERMINAL mount disconnects (see below) are sized for the NEGATIVE terminal and you can damage the battery by pounding it on the positive post.

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Old 06-08-2016, 03:33 PM   #12
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Thank you so much for your knowledge, and advice. I ordered the switch, and extra lead wires already. Now my husband and I will get it done right
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Old 06-08-2016, 03:33 PM   #13
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Check out YouTube... There are a few vids on adding one. I recently added one to mine and it was much easier than I anticipated. I used the negative terminal.
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Old 06-08-2016, 06:09 PM   #14
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Battery Cutoff Switch Installation Video

The following is a link to to a video of how I installed my battery cutoff switch. I am not saying it is the best installation but I think you may find some value in the information. This method has been working great for me.

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Old 06-08-2016, 06:24 PM   #15
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Quote:
Originally Posted by Auscon View Post
I have read that some people put it on the - terminal and some put it on the + terminal. Which one should it be put on?
NEGATIVE!

Less chance to short to the frame. If you are working with the positive cable you can easily find a place to short it out. The confusion comes from marine installations where you use the positive wire. Otherwise there is electrically no difference whether it is in the positive or negative leg.
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Old 06-08-2016, 07:40 PM   #16
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My coach battery disconnect switch, 2013 Rockwood 8315 BSS, shuts down my co2 & propane detectors and my radio. I do not have electric where I currently store my trailer and still after 3 -4 weeks, I have 3/4 charge on my battery. When I push the disconnect switch the co2/propane detector light goes off as well as the radio light.
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