I understand that we fuse to protect the wire and that the fuse should be rated no higher than the ampacity of the wire. My quandary comes in on wire runs that have power
sources at both ends such as the alternator
run, or the battery
to bus bar run.
Most of what I've seen would say to fuse these runs at the battery end only. If we are fusing to protect the wire against an over current
condition through an otherwise good wire then I can understand the single
fuse. If we are trying to protect against a possibly compromised wire mid-run then it seems that maybe there should be fuses
at both ends.
As I write this I realize that the compromised wire could likely start a fire at current
levels that wouldn't blow a large fuse so we're probably just protecting an "intact" wire from overheating
. So, that being said, why can't the fuse be located at either end instead of within 7" of the battery as I think is called for by ABYC?
I'm working on a fairly large rewire and would appreciate your comments. Thanks.