[kwlug-disc] Home made indoor TV Antenna

[John Johnson]

On 2014-09-17 10:51, John Johnson wrote:
> Caution. Any wiring on the exterior of a building - even underground - 
> is susceptible to lightning induced surges. 

Re: Underground

Lightning is one of the suspected causes of the West Virgina Sago coal 
mine disaster in 2006. The theory here is that a lightning strike on top 
of the mountain was carried into the mountain along an unused pipe once 
used to vent/capture methane. According to this theory, the charge wound 
up arcing in a methane filled underground chamber causing an explosion 
and fire.

"Another early theory was that lightning struck a methane well that had 
previously been drilled from the surface to an area behind the seals. "

http://en.wikipedia.org/wiki/Sago_Mine_disaster#Lightning_strike_and_seismic_activity

JohnJ - who has, in situ, repaired lightning damaged telecom equipment