Inline Battery Circuit Breaker

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Don C

Well-known member
Joined
Jan 15, 2009
Posts
69
Location
Eaton Rapids, Michigan
Replacing a bad circuit breaker (housing was cracked at factory install). I was curious if there is a reason that the feed from the battery is on the AUX post and the feed going to the converter on the BATT post.

Thanks,
Don
 

Lou Schneider

Site Team
Joined
Mar 14, 2005
Posts
11,161
It really doesn't make much difference one way or the other, except the contacts inside the breaker are optimized to interrupt current flowing in one direction better than the other (less arcing across the contacts).

Normally current flows from the battery to the load.  If this breaker is on the output of a converter charging the battery, the current flows in the opposite direction from the converter into the battery.  Thus the "backwards" orientation.

 

grashley

Well-known member
Joined
May 7, 2015
Posts
6,586
Location
Western Kentucky
Lou is correct, but the real reason it was likely wired that way was the guy hooking up the wires could not read. (or was too lazy / hurried to read)
 

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