Post by wisconsinjoe on Jul 17, 2021 5:31:23 GMT -8
In setting up my battery 12 volt system, do I need a fuse or breaker between the battery positive and the fuse block where all my wire circuits come in? If so, how many amps for the fuse? And what kind of fuse?
Also, should I send a ground wire from the negative terminal on my battery to the ground lug on my frame? If so, how big should the wire be?
I use a self resetting 20 amp breaker between the battery and the inside fuse block. The breaker is located in the J box which is used for the 7 way cord, grounds and tow wiring. (near the tongue) The trailer hot wire comes off the "aux" post of the breaker.
You can also get a covered breaker and mount it on the frame.
Use 8 gauge wires on the battery. Negative should be grounded to the frame. Positive goes to the "batt" post on the circuit breaker.
<a data-flickr-embed="true" href="https://www.flickr.com/photos/53634851@N03/34828339513/in/album-72157683590489800/" title="12 Volt System Diagram"><img src="https://live.staticflickr.com/4229/34828339513_425481a348_z.jpg" width="640" height="465" alt="12 Volt System Diagram"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Fuses are used according to the amps needed on each circuit. For instance, a water pump might need a 7.5 amp fuse, Fan and upper lights, 10 and 10 for the cigar plug. Most items are labeled according to amp draw. I think a Fantastic Fan draws 4 on high, maybe a little less.
All wiring must accept your amp ratings. I use 14ga, so my fuses don't go over 10 amps. If you use 16ga wiring, then your amp rating goes down. For 12ga wiring, you can bump up to 20 amps...