Re: Ham electrocuted today in Kansas City!
Needham Joe Thompson <w4cth@...>
Just goes to show how "accurate" all the rest of the reported news
As an aside, I have many years experience as an Emergency Room
physician and in running ERs. This sad occurrence happens too
often. Aside from commercial occurrences, the usual victims are
either folks installing antennas (including but not limited to Hams)
or sailboat owners. Both have the common fault of trying to move a
long metal pole throught a very visible overhead wire, the existence
of which may even be known. The other scenario is trying to shoot a
wire antenna accross overhead transmission lines. It can't be said
too often to always look up and NEVER decide that you will be able
to avoid the transmission line.
--- In W5SC@yahoogroups.com, Lee Besing <lee@...> wrote:
they had such a license, but there were many other licenses on theof
that thiscaution that Mike and I provided on tower climbing. It is so sad
be burriedtype of accident still occurs.
safetypower lines, overhead power lines, out of date or inspection
an eightequipment and any trip hazzards. Tripping on a toolbox or having
anfoot ladder fall on you can make for a very bad day.
parties involved,passed on to the ham community, especially the newer hams.
with awere installing a Comet FIBERGLASS antenna, that came in contact
is? Isingle 7620V power line. Now how do I know what the exact voltage
spent 27 yrearsbuilt and maintained the substation that fed this circuit. I
still inas a substaion technician for the Board of Public Utilities. I am
passing along.this field. So, I feel I have some experience in what I am
are ATsubstation. The wires you see going thru the residential areas
of them isMINUMUM 7200 volts from each wire to ground, and between any two
seen a fault13,800 volts. This is nothing to play with at any time. I have
can do toTOTALLY vaporize 1" copper buss (which is solid). Imagine what it
it can bea human.
are calledbroken off and sent down a property line as a single wire. Those
this is a"laterals" Yes, you will see a device at the break out point, and
the 60-100fuse. BUT the caution needs to be conveyed. These fuses are in
fallsamp range. This is at 7200 volts. On top of that, anytime a tree
the "feeder" at theacross a line, or a pole gets hit, there is a circuit on
to restoresubstaion that AUTOMATICALLY closes the fedder back in, and TRIES
times,the power to the area. Some of these "reclosers" can operate 2-5
protectivedepending on how they are set. Now from the substaion end, the
case ofdevice is set for the full fault capabilites of the line. In the
blow, and youBPU, this can be set at 600 AMPS, and multiples of that value. The
atwill understand the difference in the settings. These setting are
then it willmultiple of the 600 amp value. So, if there is a direct short,
value. So wenot trip until it reaches a value at, oh lets say, 8 times that
So, it trips,are looking at 4800 amps. and this is at 7200 volts and lower.
and none.then it energizes it AGAIN. The possiblity of survival is slim
as we allguess what. It is metal inside. Yes, fiberglass does not radiate
too closeknow. Hence the metal. That is what caused the accident. They got
not, look itto the line (remember your 'magnetic lines of flux' theory? If
followed. Thisup on the web). There is a minimum approach area that MUST be
is achanges for ALL voltages. This distance must NOT be broken. If it
find theflashover will happen, and it is not pretty. Electricity will
as a ham,shortest path to ground. In this case it was a couple of men.
many "accidents."and 27 yrs in the power utility field, I have seen way too
another place.Stop, look and if it is close or SEEMS that way- DON'T. Find
You alwaysHigh voltage lines are NOT forgiving. Your life depends on it.
get athear "it is the amps not the volts" well I can tell you when you
had thethese levels, who is going to argue what killed the person who
too close.accident. PLEASE ,PLEASE follow the warnings. ANYWHERE close is