Battery Disconnect positive or negative side?

CA Traveler wrote:
Yes.

It may be wired as intended by the mfg. It's common for the salesman switch to not disconnect everything. And my manual disconnect switches also don't disconnect everything on either battery bank.

I did install a disconnect switch on the house battery negative terminal and will probably do the same on the chassis batteries.

It's a Class C MH so no 5er or TT issues.
The battery system has the BIM Battery Isolation Manager on a separate fuse and relay panel. This BIM monitors both house and engine batteries and charges both or either when needed (Bi-directional). So it's always powered. It's wired correctly. I either have to add a cutoff for that cable (also has generator, awning, levelers and more on it) or all the negative.

"Danger Will Robinson!"

If your RV is a trailer or 5er, disconnecting the negative also disconnects the breakaway brakes. Not recommended. If you forget to reconnect the negative to the battery and tow, there is no emergency braking.

If your RV is motorized, disregard this post.

Yes.

It may be wired as intended by the mfg. It's common for the salesman switch to not disconnect everything. And my manual disconnect switches also don't disconnect everything on either battery bank.

I did install a disconnect switch on the house battery negative terminal and will probably do the same on the chassis batteries.

It is not uncommon to leave things like steps connected. Or to keep radios programmed. Disconnecting the negative is just fine.

As long as there's no electricity flowing it doesn't matter which pole it is. Obviously your 'disconnect' isn't wired up right.

strange, the entire idea of a cutout is to "cut out" or disconnect completely. Perhaps the switch, or batteries are not hooked up in the correct order ?

are you able to take a photo of your setup and post it ?