What type of fuse link holder device is most common between battery charger cable (2awg) and battery? I want to use a 15 or 20 amp fuse.
Installing a "smart" charger to replace a resonant charger. The specs call for a fuse on every cable to the batteries, yet for the 21 years we've owned the boat there were none. The battery charger circuit has it's own breaker. What gives?
PackMule,
to answer your question.
I suspect a 15 or 20A fuse will be too small. I would suggest at each of the battery enda you use a fuse about 20% to 25% larger than the full charger output. That will protect the wiring from the batteries in case of the above yet avoid nuisance trips. You will need a strong mount for the fuse holder.
You should also be using a wire sized for the full charger output to each battery in the case of multiple banks.
+1. I use a Blue Seas MFBF 3 fuse holder for my 3 bank battery charger. It is a 60 amp charger so I used 75 amp fuses and cable rated for 75 amps to the battery bank.
I looked at using the BS MRBF Fuse & holder on a planned batty bank but noticed the hole for batty lug is 3/8" and my batty lugs are 5/16"... anyone found a work around?+1. I use a Blue Seas MFBF 3 fuse holder for my 3 bank battery charger. It is a 60 amp charger so I used 75 amp fuses and cable rated for 75 amps to the battery bank.
I've searched every way I know but can only find 3/8" hole for 3/8" stud.I believe they make both 5/16” and 3/8” ones.
Any reason why a manual reset circuit breaker would work?
I have used one like this for charging a towed vehicle behind our motorhome. If it trips it eliminates the need to have / find a spare fuse.
INLINE 20 AMP CIRCUIT BREAKER MANUAL RESET 12V 20A 4 6 8 AWG GAUGE
I thought these were designed to be mounted directly to the battery terminal.The AYBC recommendation is to have overcurrent protection within 7" of the connection to the DC system. If connected directly to the batteries and the wires are more than 7" long then you'd want to have a fuse or circuit breaker mounted within 7" and then run to the charger. (31.5.2.3.1)
CorrectI thought these were designed to be mounted directly to the battery terminal.
If you are installing something new, consider a Blue Sea battery terminal fuse #5191. Get a couple of spare fuses as they are less common to find. Easy to mount and it truly protects all of the cable.