Please help assess my 12v system!
Would really appreciate it if some folks with electrical experience could comment on my set up. I don't have an inverter or solar or anything just an isolator and aiming for a really simple setup. ...
Forum Discussion
DrewE wrote:
You should have a 125A fuse next to the house battery on the line going to the isolator (in addition to the one next to the chassis battery). Without it, there's no safety protection against a short in that wire.
It's not a requirement that the negative returns from the loads go to the fuse panel and thence back to the battery, although that certainly is one reasonable and not uncommon way of doing things. They can just as easily go back to chassis ground as convenient, or at one or a few central bus bars. Likewise, the negative wire between the battery and the fuse panel could also just be chassis ground. If it's convenient to do so, it may well be a lower impedance path than running a wire, particularly if the battery and fuse panel or ground bus bar or whatever are not too close to each other. Again, what you show isn't wrong; I just wanted to be sure you understood that there were other possible alternatives as well.
Thank you DrewE! Good point about the extra 125 amp fuse. Will get that in there asap. As for the ground bus, I have a fuse box with an integral negative bus so that's probably actually the most convenient route.
