Re: just an idle question


"Mike Corey" <AWR7MMSTW@xxxxxxxxx> wrote in message
news:20794-485DCB5F-315@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
There sure are quite a few misconceptions in this thread, so.....




A fuse is to protect the wiring, no more no less. A thermal overload
protects a device.

A fuse is not intended to protect human life. Ground Fault Circuit
Protection, and Submersion Protection are to protect human life.


Rubbish. There is no such thing as a ground fault circuit protector
on a vehicle electrical system because such a system is not connected
to ground. In case you missed it, vehicle DC systems are 2 wire,
they lack a safety ground wire (green wire) a wire which is present
on both DC and AC terrestrial power systems (other than distribution
systems)

Your statement is equivalent to saying that the stress load ratings
on a steel beam are there to keep the steel beam from being buckled
by overloading it, no more no less. The fact that might be in a bridge
and precipiate a bridge collapse with people on the bridge is nothing
more than a secondary side issue. Sheesh!

The glass fuses in the fuse box in your home (if your home is older
and still has the old panel and hasn't been rewired for circuit breakers)
are not there to protect the wiring. They are there to prevent the house
from burning down by preventing the wiring from overloading. This is a
human life safety issue. The same issue exists with vehicle systems
-particularly- with automotive systems. With an automotive system there
are many areas in the vehicle where the wires pass through plastic
which is flammable, and if the wires were to overheat and start their
insulation on fire, it could cause a vehicle fire which would burn the
car up, as well as spew toxic gasses into the passenger compartment,
which could easily cause an accident if the car were in operation when
it happened.

Ted


.

Relevant Pages

  • Re: Faulty Vehicle
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  • Re: Faulty Vehicle
    ... The 200A fuse is there to protect the cable, in case the lift electrics has developed a fault.. ... to melt 200As worth of fuse link..Time during which the electronics, if there is any, can well and truly fry. ... Protective devices at these sorts of currents often only come into play to protect other things once something has already died. ... If they have used power semiconductors instead of relays as the series switching elements instead of relays - then the "electronics" wouldn't have been been protected by a much smaller fuse. ...
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  • Re: Faulty Vehicle
    ... The 200A fuse is there to protect the cable, in case the lift electrics has developed a fault.. ... melt 200As worth of fuse link..Time during which the electronics, if there is any, can well and truly fry. ... Protective devices at these sorts of currents often only come into play to protect other things once something has already died. ... If they have used power semiconductors instead of relays as the series switching elements instead of relays - then the "electronics" wouldn't have been been protected by a much smaller fuse. ...
    (uk.legal)
  • Re: How to best reduce amperage from car-cigar-lighter adapter?
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  • Re: 3 blown Power supplys in 6 months.
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