Ryan,
The purpose of the fuse on the battery terminal is to protect the wire (and
switches, etc) that runs from the battery to the panel. This fuse should be
sized appropriately by the wire size. For example, My house bank uses 6 ga
wire to feed the panel, so I have a 100 amp fuse on it. No matter what I put
on the other side of the breaker panel, the job of the battery terminal fuse
is to protect that 6 ga wire. I don't have much stuff on my boat, so that is
much more than enough capacity for my case. If I had a lot of high demand
stuff, I would need to resize the wire that feeds the panel (and resize the
fuse that protects that wire). For the start battery, things get a little
more interesting. A starter motor can draw a very high load when you first
hit the button. For your A4, most people use 4 ga wire with a 150 amp fuse.
In my case, I used the same 6 ga/100amp setup as the house bank and I have
not had any problem. Most people would not approve of my setup, they would
say that it would blow lots of fuses.
James
Delaney
C&C 38 mk2
Oriental, NC
-----Original Message-----
From: Ryan Doyle via CnC-List
Sent: Saturday, June 04, 2016 9:32 AM
To: [email protected]
Cc: Ryan Doyle
Subject: Stus-List Battery Terminal Fuses
Hey guys,
My 1976 30mki did not come with fuses at the battery terminals and I would
like to add them.
I have a simple system with two batteries - one starting and one house.
My house loads if I'm running the autopilot and I have every blower and fan
and led light on and add up to 12.3 amps. I have a new blue sea breaker
panel and all new 14 ga wires throughout.
However, I have no idea what size fuse to put on the terminal of my starting
batt. The motor is an atomic 4.
Anyone know?
Thanks,
Ryan
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_______________________________________________
This list is supported by the generous donations of our members. If you like
what we do, please help us pay for our costs by donating. All Contributions are
greatly appreciated!
