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Old 06-19-2014, 08:39 AM   #1
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Battery Disconnect Switch

I have a 2010 Sierra 355QBQ fifth wheel and would like to install a battery disconnect switch. Can anyone recommend which one is best for an RV? Do I need a single circuit or a dual circuit switch? How are these installed and or hooked to the battery? Are additional cables needed?
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Old 06-19-2014, 09:13 AM   #2
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Here is a good start.....

Battery Disconnect Switch
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Old 06-19-2014, 12:46 PM   #3
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Blue Sea marine switches are the best out there.
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Old 06-24-2014, 11:40 PM   #4
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OK, I like the Blue Sea Marine switch 6006. Now what size cable(s) wire gauge do I use. I had seen a post talking about 4 and 8
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Old 06-25-2014, 07:17 AM   #5
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OK, I like the Blue Sea Marine switch 6006. Now what size cable(s) wire gauge do I use. I had seen a post talking about 4 and 8
I used 1/0 cable "overkill"? Probably.
6 ga. Would be fine.
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Old 06-29-2014, 06:24 PM   #6
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I just got a cheap one from Harbor Freight. On sale they are $2.99. they handle 300 amps too. Also bought a 4 gauge lawnmower jumper wire from Walmart. Removed the negative lead from battery and connected to one side of the switch. Used the jumper from the other side of the switch to the battery. As a bonus, the disconnect switch has a plastic "key", (comes with 2), that can be removed if you want. My key is chained right by the switch so it don't get lost. Amazon has the same switch for $13.52, free shipping.
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Old 06-29-2014, 07:35 PM   #7
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Blue Sea Marine for me. Do not skimp on switch quality.
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Old 06-29-2014, 09:12 PM   #8
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Don't understand amps. What is the right amount as far as amps are concerned on the switch? Some connect to the positive side of the battery and others to the negative side. Which is it? I looked at the one from harbor freight. Seems like that one would be in the way of the battery box.
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Old 06-29-2014, 09:41 PM   #9
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Don't understand amps. What is the right amount as far as amps are concerned on the switch? Some connect to the positive side of the battery and others to the negative side. Which is it? I looked at the one from harbor freight. Seems like that one would be in the way of the battery box.

Just buy a quality switch (the cheap ones will melt and put you in danger). Cut the positive wire in a convenient place close to the batteries and install the disconnect switch. No need to do anything on the negative side. Compare prices!
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Old 06-30-2014, 11:56 AM   #10
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Blue Sea switches are great! I opted for a Flaming River Big Switch with removable key to eliminate battery drain when away from the trailer or parked at home. It also came with a mounting bracket. It is super heavy duty, waterproof, and vibration resistant.

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I may have been the one referring to different wire sizes. My auto parts house made me custom length 4g wires as that is as small of wire as they had. The consensus is that you can go bigger, just not smaller.


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