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Re: Holy Crap!



Original poster: Bert Hickman <bert.hickman@xxxxxxxxxx>

Tesla list wrote:

Original poster: Russell L Thornton <Russell.L.Thornton@xxxxxxxx>

Hi all,
I am reading some of the descriptions of ball lightning here and getting a little confused as to what I understood it to be. My Dad has told me of his witnessing a ball of lightning hitting the ground, on the farm he grew up on in N. Dakota, and rolling into the barn and catching stuff on fire. He is not one I associate with making up stories but I have always kind of classed this one up there with sitting on top of telephone poles after the snow and walking up hill to school both ways. Having said that, I travel I-95 twice a day here in central Florida, known for liquid sunshine and lots and lots of lightning. One day traveling home I witness a strike to a power pole over a mile ahead of me and a huge (it must have been huge from the distance) sphere of light remained on the cable and traveled across the cable at a relatively slow rate. It lasted so long that, if I had a camcorder I would have had plenty of time to reach down, turn it on, aim and still capture several seconds of it.
Now, here is my question:  Was what I saw ball lightning?
Russ
Monitoring lightning at the Cape

Hi Russ,

While it could have been ball lightning, it was more likely that what you saw was an electrical arc that the lightning stroke initiated between one of the phases and a nearby ground wire (such as the one at the top of poles for protecting the power lines underneath). Once initiated, a phase to ground arc can persist for quite some time before stopping either by being self extinguished, or by eventually tripping an upstream ground fault detection relay (a 3-phase version of a home GFI or arc fault detector... but on steroids).

Bert