Forum Discussion
DrewE
Mar 24, 2016Explorer II
mordecai81 wrote:
I installed my battery disconnect 18 inches from the battery on the negative line and zip-tied it to the trailer tongue. With the switch off, there is no power going to the interior of the trailer. The disconnect is fully enclosed except for the bottom where the negative cable runs in and out.
What are the negatives, so to speak, of my set-up? Sorry for the hi-jack, OP:D
Basically that you can't have circuits with chassis returns that are not disconnected with the switch. Perhaps the most important of those is the emergency breakaway trailer brake system. Often there may be other non-disconnected circuits, such as for CO and propane detectors (though arguably one would want them disconnected), for electric entry steps or a power trailer tongue jack, or for radio preset and clock memories.
Purely in terms of isolating the battery from the RV in an electrical sense, it doesn't matter one bit if you disconnect the positive or the negative.
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