Re: Road hazard

On Sun, 16 Feb 2025 16:32:01 -0300, Shadow <Sh@dow.br> wrote:

On Sun, 16 Feb 2025 10:11:50 -0600, AMuzi <am@yellowjersey.org> wrote:
>

https://cwbchicago.com/2025/02/dog-dies-after-stepping-on-electrified-manhole-cover-in-river-north-witnesses-say.html
>
Yikes!  Fortunately we have rubber tires.

>
Even if you used metal tires, the charge would travel up one
wheel, through the frame then down and out the other wheel IOW the
path of least resistance.
Only cases of fatal electrocution I've seen the body closed
the circuit.
[]'s

The photo shows ice and slush on the road.  Add a little road salt and
we have a tolerable conductor.  US Street lighting can be 120, 208,
240, 277 and 480 volts.  All of them can kill someone if the voltage
goes from arm to arm (through the heart).  Less so at the lower
voltages or from arm to leg. 

I have personally not seen anyone die or seriously injured by
electrocution via underground power cables.  Everything I've read or
hear is from 2nd or 3rd party anecdotal experiences.  The closest I've
seen is when someone tried to steal the copper power wiring in my
father's factory electrical panel and forgot to turn off the power.
RIP.  I'm sure electrocution by manhole cover can happen, but unless
the wiring and insulation are seriously compromised, the chances of it
happening is very small.

<https://injuryfacts.nsc.org/all-injuries/preventable-death-overview/odds-of-dying/>
Looks like the National Safety Council lumps electrocution together
with some odd things that are not really related to electrocution:
Electrocution, radiation, extreme temperatures, and pressure
1 in 14,383  (or 0.007%)


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Jeff Liebermann                 jeffl@cruzio.com
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