Just got my Torx box installed and my battery switch. Wanting to wire it up tomorrow. I believe I know (negative) but thought I would ask do I put the switch on the Neg or pos? Thanks for your help guys..

Bottom line is it doesn't really matter on a trailer - both work, and you can argue it either way. I came out of boats, and I think positive is the best way to go as there is no "potential" voltage anywhere - can't hit anything hot and make a spark ....

On my MH I put my battery cut out switch on the negative side.

It's usually Pos. Think of Neg as the ground, makes no sense disconnecting it when it's literally sitting on it. As the boater noted, there is more risk to make a spark if Pos remains connected. It will "work" either way, but switch on Pos is better.

Almot wrote:It's usually Pos. Think of Neg as the ground, makes no sense disconnecting it when it's literally sitting on it. As the boater noted, there is more risk to make a spark if Pos remains connected. It will "work" either way, but switch on Pos is better.Interesting. Don't those little electrons fly off the atoms and really come out of the negative terminal and go back in the positive terminal?:B Either way will work as long as the circuit is broken. Don't take this serious, just kidding

An exposed switch such as a knife style I would put on the negative. Especially if in a metal box. Otherwise a standard insulated switch I recommend putting on the positive to stay with the existing conventions of switches and fuses to be on the hot lead.

Positive or Negative to Battery switch | Good Sam Community

Old-Biscuit
Explorer III
Apr 21, 2015
Negative shuts off ALL loads.

Positive, depending on where installed, can still have parasitic loads (LP detector, radio/stereo) and tongue/landing gear can still be powered)

SO........
Put it where it works for you.
Tlauden
Explorer
Apr 21, 2015
Positive, that way there is nothing hot anywhere in case of accidental grounding...
Teeton
Explorer
Apr 21, 2015
Holy crap!!!Put one on both all ready.. :)
Almot
Explorer III
Apr 21, 2015
smkettner wrote:
An exposed switch such as a knife style I would put on the negative. Especially if in a metal box.

Didn't think anybody is still using this type of switch, but - yes, this would be the only scenario when it's better on Neg.
Almot
Explorer III
Apr 21, 2015
dp
SCVJeff
Explorer
Apr 21, 2015
2PST
fla-gypsy
Explorer
Apr 21, 2015
My battery disconnect switch instructed me to place it on the negative side. As far as the the political side of positive and negative, some of you could use some "shock" therapy.
beemerphile1
Explorer
Apr 21, 2015
MH - doesn't matter

Trailer - positive and the breakaway is wired prior to the disconnect.
Houston_Remodel
Explorer
Apr 21, 2015
Ours is on the negative side as that is where the electrons leave the battery.

The trailer box is dead, the hitch and break away switch still work.

Most importantly the hitch light will NOT work so people can't leave it running by accident or on purpose to drain the battery.
D_E_Bishop
Explorer
Apr 21, 2015
It looks like this has pretty well played it's self out, however, I have a question. I have looked for a description of a Torx box without luck. Being that the discussion is about a TH and I'm more familiar with MoHo's, I kindda figure it has to do with towed RV's rather than powered RV's. Anyway, searches provided nothing but ads for TOXR wrenches.