[aprssig] APRS (Fire) In A Car
kb8uih at sbcglobal.net
Tue Jan 24 17:17:02 CST 2006
I learned the hard way. #10 power wire to a
distribution block in the car, no fuse inline.
Something shorted, car filled with smoke, wrecked the
rear fender when I couldn't see where I was going.
Burned wiring harness under the hood where I ran the
wire from the battery to the firewall to the passenger
compartment. Burned power wire to the 100 watt GE
mobile, lucky I didn't burn the radio. It was fused
but was overlapping the power wire from the battery by
the distribution block in the car. Ford dealer had
the car a month. That is another can of worms. It
may have taken a few days to a week actually working
on the car.
--- Rick Green <rtg at aapsc.com> wrote:
> On Mon, 23 Jan 2006, VE7GDH wrote:
> > Stan N0YXV wrote on Jan 23 2006
> >> OK I get the small wire point but, what's the
> best solution?
> >> Two separate fuses?
> > Recommended procedure is to fuse the negative lead
> as well as the positive.
> That does no good whatsoever if the fuse is too
> big for the conductor.
> The NEC specifies that ALL wiring downstream of an
> overcurrent device be
> sized for the full current capaacity of the source.
> That would mean that
> you either a) use wire capable of carrying 10 amps,
> even if the device
> only draws milliamps (normally), or b) insert a
> smaller fuse at the point
> where you transition from the high-current supply to
> the smaller wire.
> Rick Green
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