Installing B&C 40 Amp Alternator Question

[bruggers]

Quick one.

Old RV4 (1991) replacing original Vans/Honda 35 AMP Alternator with new B&C 40 AMP. Any problems with continuing to use the original 35 AMP Breaker from Alternator to BUSS?

Thanks!

[vic syracuse]

If your loads have been consistently below that you should be OK IF you don't install a Lithium battery. Otherwise the alternator will dump the whole 40 amps and you may blow the breaker.

Vic

[lr172]

depends a bit on fuse/breaker type and typical loads. If you look at the charts, you'll see that traditional thermal breaker will take 10+ minutes (I vaguely rembmer it being around an hour) to trip at their rated current. It's a logrithmic scale, with higher currents tripping substantially faster. I suspect slow blow fuses are similar, but haven't really looked at the specs.

So, if a drained battery draws 40+ amps for a minute or two, it likely wouldn't be a problem. Just look at the charts for the fuse type.

Larry

[bruggers]

Thanks to All!

KenB