"Steve" wrote in message
...
I'm preparing to install a 100 amp alternator and AutoMac II charge
controller on my boat. I read over the controller installation
instructions
and couldn't find any mention or requirement for fuse in the output lead,
to
the battery switch.

I seem to remember that fuse is a recommend (or required) in this type of
installation.

I picked up a 100 amp fuse and holder. However, I got to thinking, if this
fuse blows, then I wipe out my alternator, just the same as if I opened
the
battery switch while the engine is running.

The OEM wiring on my Volvo MD2B doesn't have a fuse or fuseable link in
the
alternator output lead. This lead goes directly to the starter cable
terminal.

Thoughts or suggestions??

Steve
s/v Good Intentions

You're right. Don't fuse it.

If you're charging batteries via a diode the danger of a short only exists
while the alternator is charging. Make very sure (with your insulation and
installation) that this can't happen to the line from alternator to diode.

Without a diode the danger of a short exists whenever the battery switch is
made. Be even more careful, and switch the battery off when it's not in use!

--
Jim B, Yacht RAPAZ,
Summers in the Med, winters in UK
jim[dot]baerselman[at]ntlworld[dot]com