We've had a 928 fire, and here's what we learned...
#211
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There's a passive fire suppression system called 'BlazeCut'USA.com.... It's a 'hose' filled with 'HALON' ( I think) that you mount in the area you want to protect. When the temp. in the area exceeds the rated temp of the 'Hose' , It Bursts & releases The fire suppression chemical.....Putting out the fire....It's a "One-Shot' system, No wiring needed...Just install it & Forget it.. Google "BlazeCutUSA,com' for more info.
Instead, the discussion goes towards preventing the insulation melt-through. Car's original proposal was to add a very large fuse near the battery, but that location only protects against a wiring fault between the battery and the solenoid. As Alan shares, the circuits really need source-end fusing, so there would be fuses between the starter and the alternator, at either end of that cable. One for the ABS feeder there too, another at the alternator for the cabling between there and the CE panel, a section that includes the cabling between the "jump post" to CE panel that appears to be at the root of the fire. Fusing that section at the correct protection level would preclude use as an actual jump-start post, unless you used a slow-blow fuse or breaker there.
I think Alan summed it up perfectly:
"There is only so much you can easily do without getting into extensive modifications. If you are going to change the primary wiring at all you need to be very sure you can implement it well - or you are just adding new risks."
#212
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X 928.
I am reminded that the Apollo 1 command capsule's electrical fire's root cause was "a failure of imagination" Or in other words, Humans are not very good at figuring out all possible, or even all probable, failure modes. Certainly not one human by him/herself.