[rescue] DC Voltage distro

[Phil Stracchino]

On Wed, Sep 22, 2004 at 03:53:36PM -0400, Sandwich Maker wrote:
> anecdote: when i worked at attbl, a craft person told me of the time
> he dropped a crescent wrench onto the bus bars of a big metro co while
> working on the overhead track.  it should've been clipped to a
> lanyard, per safety regs...

Lucky he just dropped it on the bus-bars.  Get a little resistance into
the circuit.

At one of the RAF stations my dad was posted to, a groundcrew mechanic
once accidentally dropped a sparkless phosphor-bronze wrench squarely
across the terminals of a 24v/100Ah aircraft battery.  The direct short
vaporized the wrench, killed the mechanic (something like 90%
third-degree burns, plus seared lungs from a lungful of plasma) and
copper-plated the wall he was standing in front of at the time.


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