Quote:
Originally Posted by harveyrv
Option 2 would be to run a 10G wire back to your batteries and install a 30A inline fuse right at the battery.
option 3 would be to splice into the Bergman cable charge line and put a 30A fuse right at the splice.
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FYI, the reason you install the fuses in these positions is to protect the wire, in addition to the appliance.
In option 2, for example, let's assume some insulation on the wire had worn through a bit halfway under the trailer and shorted to the frame. If you had installed the fuse at the jack, it would of course blow as it's supposed to. But since the short is in between the fuse and the battery, the fuse did not interrupt the circuit, and thus, current continues to flow through the short.
This obviously is not ideal. At the very least, it will quickly drain your battery. And at most, a fire will start and your trailer will burn to a crisp.
If you had installed the fuse at the battery, the fuse will blow, and the circuit is interrupted.
This is also the reason your circuit breaker or fuse box in your home is exactly at the spot where the wires enter your house from the road.
Dave