Rv Battery Disconnect Switch Installation Positive Or Negative

My first inclination was to put the switch on the negative leg of the circuit.

Rv battery disconnect switch installation positive or negative.

Well if the electrons are flowing from the positive to the negative and some are getting used up by the starter and or the system so there should be less going back into the battery. If your battery bank is floating not tied to any sort of safety frame ground in theory you want a double pole switch that turns off both and power at the same time. Thus less amps on the switch. It s a class c mh so no 5er or tt issues.

I say negative and heres why. Typically the battery disconnect switch is designed to disconnect the house batteries similar to pulling the negative cable off the battery so nothing can drain it when the unit is not in use or in storage. If your system has the battery negative tied to earth safety ground or frame ground of a vehicle then you want the switch in the positive leg. The battery system has the bim battery isolation manager on a separate fuse and relay panel.

Just be careful when making any connections to house batteries. This essentially adds a on off switch to the positive line going from the battery to the camper so when turned to off the camper devices do not continue to draw from the battery. To provide more specific troubleshooting information we need to know the make model and year of your rv. Spotting the switch in the rv is quite easy.

The switch is rated at a steady amp and a momentary amp. The negative cable connects to the body ground already so there s no additional danger if it rubs. In case your rv does not have one you can opt for an aftermarket rv battery disconnect switch installation. There s a more practical reason the negative post is more accessible and it doesn t have the extra hot wires going to the positive battery clamp to deal with.

If the geometry of the situation forces you to put it on the positive terminal that works just as well. It s the same principle as why you should always disconnect the battery s negative side first. The switch disconnects the battery s electrical power or isolates from the house portion of your rv. So you re less likely to have the shower of sparks when disconnecting the switch since you re further away from the fender well sheet metal.

For our application yes the positive terminal of the battery was connected to the disconnect switch and then the camper positive was also connected to the other pole. To wrap it up usually the best place to install a battery disconnect switch is at the negative battery terminal where it connects to the chassis. I did install a disconnect switch on the house battery negative terminal and will probably do the same on the chassis batteries.