CleanDiesel
Norton, Ohio
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Joined: 06/19/2007
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Gang,
I just finished my battery box; I posted about it here...
With that all installed I next will put in this disconnect switch. When I searched for advice on where to stick it ( + or - line ) I ran into a couple threads that didn't seem to get to a consensus on the issue. I didn't realize there was this great debate.
Where does a disconnect go? That's right - you get to tell me where to stick it!! 
TV: 2007 Dodge Ram 3500 SLT Quad Cab 4x4 Dually 6.7L Cummins Auto w/3.73s & Prodigy 
TT: 1995 Damon Escaper 5'er 36RLB
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Corkey05
Washington State
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Joined: 06/04/2005
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Lots of opinions on this subject, and most of the have merritt, but when I wired my TC I followed standard OEM guidelines. I have never seen an OEM installed with the disconnect switch on the ground, always on the positive, so thats what I did.
I don't know who has the TC now, but I'm sure the new owners (and service techs) will understand where to look for the disconnect switch.
2008 HR Endeavor PDQ - Blazer 4 Down
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dpark
Central PA
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Joined: 03/27/2008
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When we put disconnect switches on our big trucks (similar battery setup to an RV) we always mount them on the positive lead.
2006 Chevy Silverado Crew Cab
2006 Springdale 267BHLGL
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Honda EU2000is
Me, Wife and 3 year old camping buddy daughter
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wa8yxm
Wherever I happen to park
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Joined: 07/04/2006
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Should the battery disconnect be put in the POSITIVE or NEGATIVE line.. Answer YES
Fact is, it truly does not matter much
Nothin adds excitment like something that is none of your business
Kenwood TS-2000 housed in a 2005 Damon Intruder 377
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1995brave
San Antonio, TX
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Joined: 01/24/2006
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I could tell you where to stick it, but that wouldn't answer your question. I mount mine on the positive side. If you check the cutoff switches that mount to the battery terminal posts you will see that they only fit the larger post(which is the positive).
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goodcruisin
Greenwood, IN
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Joined: 04/17/2007
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It should be in the positive (+) line. Every power cutout switch I've seen on our firetrucks have it on the positive side.
John (USN Ret) and Debbie
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pritch272
Martinez, GA
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Joined: 03/18/2006
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Hey, I put one on each! I needed to "anchor" both cables down and the disconnects provided a handy way to do that.
Retired US Army
2000 Ford F250 SD 7.3 PSD, Firestone Ride-Rite™ air springs
2007 Keystone Laredo 29RL, Doran Pressure Pro and Metal Tire Valves, 16" Michelin XPS Ribs, Dirt Devil CV950 Central Vacuum, 2000W AllPower (Honda Clone), 4000/3500W Champion C46540
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hemi-kz
Eastern PA
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Joined: 06/14/2006
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I vote for Negative. Car and Truck service manuals always say to disconnect the negative terminal before working on the vehicle.
2007 KZ 22 Sportster Hybrid Toy Hauler
2003 Dodge Ram 2500 4x4 Hemi Quad Cab Short Bed
1990 Harley Electra Glide Classic
2005 Harley Sportster 883L
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TMBLSN
Washington State
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Joined: 04/07/2008
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Positive. Automobiles are a different animal, as the entire chassis is connected to the ground.
The reason for disconnecting the negative on a vehicle is that if you try to disconnect the positive first, you can easily become a conductor by simply touching the chassis while unbolting the positive terminal (not good).
2006 Jayco 275BHS
1998 C2500
Lee
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Corkey05
Washington State
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hemi-kz wrote:I vote for Negative. Car and Truck service manuals always say to disconnect the negative terminal before working on the vehicle. True, but cars and trucks don't usualy have two battery banks. Disconnect one ground and leave the other active and someone could be in for a BIG surprise. Isolators, boost switches, etc. throw an element of dangerous conditions into the mix.
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