> > A fuse will never protect _you_ nor the device. It is only ment
> >to protect the house/the installation....
> This I have to take issue with (though I'm probably quibbling over
> semantics?).
Well, somehow yes - it is maybe about what protection means.
> The purpose of the fuse in the PLUG is to protect the power cable between the
> plug and the device from carrying an unsafe current in the event of a problem
> with that CABLE.
Well, not protecting the cable - it's about protecting the
environment from damage a cable may caus - the fuse should
prevent that a cable (whereever it is installed - this is
the same for household fuses as for 'in-plug' fuses) gets
to hot and maybe ignit a fire, damaging your house. Basicly,
if looking at a cable, this also means keep it in good
condition.
> The device itself should contain a second fuse which is there to protect the
> PSU in the event of a failure or overload.
Again, not protecting the PSU from damage (A damage did,
in most cases, already occure if the fuse is blown), but
rather the environment from possible negative effects of
a malfunctioning PSU.
> At least that's what we were taught when I did an electronics course a few
> years back.
Well, I did 3 years training on electronics (didn't we all had a
_real_ job before going into the computer business :). Of course
my knowledge was primary targeted on German rules, we had to take
lessons on foreing codes, since we had to build and/or maintain
stuff internationaly. Also, at least within Europe, the codes are
unified.
Gruss
H.
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HRK
Received on Tue Oct 12 1999 - 14:23:38 BST