Date:         Tue, 8 Aug 2017 00:49:33 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Fuse Size: Aux battery to fuse block
Comments: To: Neil N <musomuso@gmail.com>
In-Reply-To:  <CAB2RwfinRfnevvw9r1XUmFGQBXLND9vxhFpcNfs=_TYXAMw67A@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Bosch Automotive Handbook says half a volt total drop on supply side
acceptable for most 12V automotive circuits, assuming ground through
chassis.

Littelfuse specifies their ATO fuses to carry 110% rated load for minimum
100 hours, to blow at 135% in maximum 600 seconds (minimum 3/4 second), at
160% in maximum 50 seconds, at 200% in maximum 5 seconds.  At 600% in
maximum 100 or 150 (35 and 40A) millisecs.

I think VAG were wrongheadedly old-fashioned in leaving unfused wires all
about.  Judging by the '09 Passat I just looked at, they've caught up to
the Japanese and the rest of the world in fusing everything that comes off
the battery barring the starter cable.

Yrs,
d


On Mon, Aug 7, 2017 at 10:29 PM, Neil N <musomuso@gmail.com> wrote:

> Steve: No. No motor or anything like that. Thanks.
>
> Thanks Dennis. Ok, I see what I did wrong. Wire charts I looked at
> were for 12 Volts (vs 13.8 or 14). The marine application wire size
> calculator I saw could be set to a 10% voltage drop for "non critical"
> loads so on the wire size calculator I actually used, (here):
>