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Subject:Re: Battery Circuit Breaker
From:kenneth d lewis
Date:Wed, 17 Feb 1999 22:21:53 EST

Joshua;
        Fuse ratings can really get bewildering. At work I probably could
find a dozen different 2 amp fuses, fast blow, slo blow, 125v, 250v, 10v,
etc.. You almost need an engineering degree. That's why I am hesitant to
recommend a battery fuse. Apply a mismatch and without fail you will find
yourself in the middle of nowhere, "dead in the water".
Drive Safely & Good Luck
Ken Lewis<Kernersville,NC>86 VW crewcab;60 T-5 Coupe

On Wed, 17 Feb 1999 19:07:17 -0600 Joshua Van Tol <jjvantol@USWEST.NET>
writes:
>
>You'll have problems with nuisance blowing if you only go 25% over
>capacity. Typical sizing is 1.5 to 2.0 times the rated current. Some
>loads, such as motors, have fuses that are sized to take the turn on
>current, which could be several times higher than the running current.
>
>As an example of what I'm talking about, your headlights are probably
>45 W low beams. They have a 10A fuse, which translates to a load of
>10 * 14 = 140 W at 14 volts.
>
>As you say, there's really no good way to fuse the battery lead.
>You'd need a 400 A fuse or so, and that really wouldn't do any good
>unless the power lead fell off and touched the frame.
>
>Joshua Van Tol -- jjvantol@uswest.net
>

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