[kwlug-disc] Home made indoor TV Antenna

[CrankyOldBugger]

This is why you should use plenum-rated cables if running lines through
ductwork.  Normal cheaper cable will release toxic gases when burned.
 Plenum cables apparently don't...

https://en.wikipedia.org/wiki/Plenum_cable



On 17 September 2014 18:38, John Johnson <jvj at golden.net> wrote:

> 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
>
>
>
>
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