What size DC Circuit Breaker in Class B?
Hello all -
Due to some recent starter issues in my Sprinter based RV, the DC circuit breaker (between the battery isolation relay and the chassis battery) burnt up. As in - partially melted. On one hand, I'm happy that it perished doing it's job, but now my generator won't start and the alternator no longer charges the coach batteries... So I need to fix it.
This was caused by the starter pulling extreme amounts of current from any source it could find, yet still not turning things over. This was not the only part that fried. All other compromised parts have been replaced by the Mercedes dealer who also replaced the starter and some electrical modules and switches.
I'm wondering what size circuit breaker to replace it with. Since it partially melted, I can't determine the original size. 30A? 40A? or 50A? Interested in opinions. Here are other things I know:
Conversion was originally a 2003 Forest River MB Cruiser.
120v service is only 30A.
Chassis battery is group 49 (800 something CCA)
House batteries are 2 6v AGM Golf Cart batteries (220 AH @ 12v)
Converter is 55 amps.
I have 30A and 40A circuit breakers available now.
I'm not there now, so I can't determine wire gauge sizes. Don't recall them being especially big or difficult to manage when I replaced the battery.
My gut says that smaller is better, and I'd rather burn up a $5 breaker than just about anything else. Interested in other opinions.
Thanks!
Due to some recent starter issues in my Sprinter based RV, the DC circuit breaker (between the battery isolation relay and the chassis battery) burnt up. As in - partially melted. On one hand, I'm happy that it perished doing it's job, but now my generator won't start and the alternator no longer charges the coach batteries... So I need to fix it.
This was caused by the starter pulling extreme amounts of current from any source it could find, yet still not turning things over. This was not the only part that fried. All other compromised parts have been replaced by the Mercedes dealer who also replaced the starter and some electrical modules and switches.
I'm wondering what size circuit breaker to replace it with. Since it partially melted, I can't determine the original size. 30A? 40A? or 50A? Interested in opinions. Here are other things I know:
Conversion was originally a 2003 Forest River MB Cruiser.
120v service is only 30A.
Chassis battery is group 49 (800 something CCA)
House batteries are 2 6v AGM Golf Cart batteries (220 AH @ 12v)
Converter is 55 amps.
I have 30A and 40A circuit breakers available now.
I'm not there now, so I can't determine wire gauge sizes. Don't recall them being especially big or difficult to manage when I replaced the battery.
My gut says that smaller is better, and I'd rather burn up a $5 breaker than just about anything else. Interested in other opinions.
Thanks!
