[ubuntu-uk] External CAT5 (subject change for change of topic)

alan c aeclist at candt.waitrose.com
Sat Oct 23 11:52:33 BST 2010

On 22/10/10 18:03, Mark Harrison wrote:
> Date: Fri, 22 Oct 2010 10:47:42 +0100
>>  From: Alan Pope<alan at popey.com>
>>  Subject: Re: [ubuntu-uk] Powerline Recommendations
>>  To: bdrake at crosswire.org, UK Ubuntu Talk<ubuntu-uk at lists.ubuntu.com>
>>  Message-ID:
>>         <AANLkTi=EEEf3pWvvg3R2BdtmAfvJZaq8Nun6B5GP7OhM at mail.gmail.com>
>>  Content-Type: text/plain; charset=ISO-8859-1
>>  On 22 October 2010 10:44, Barry Drake<bdrake at crosswire.org>  wrote:
>>  >  I drilled throught the outside wall and have CAT5 all around the
>>  >  outside. ?Quick, easy, fast, secure ....
>>  >
>>  ...almost certainly against building regs.. :)
>>  If it gets struck by lightning (a very real possibility given it's
>>  grounded via your PC/switch at each end, it could blow your entire
>>  network up.
>>  Armouring the cable may help though.
>>  Al.
> I've been active in the Home Automation market, both as a hobby and then
> professionally, since 1997, and have never encountered a lightning strike on
> external cable.

Our house has 3 large scots pines within 5 or 6 meters. The roof 
mounted TV aerial is almost surrounded or within arms length of some 
branches. One day, I chanced to actually see a lightning strike on 
these trees one afternoon. The TV was on at the time, in my view, 
although I was also looking out at the storm. We much later discoverd 
a large branch at the top of one tree was broken, I guess, by the 
strike. Anyway, The TV went off at the strike. When the storm ceased, 
I investigated. The mains powered TV signal booser amplifier, near the 
TV, had failed, no external fault was apparent, nor burning, 
presumably saving theTV tuner. The amplifier happened to still be in 
warranty, and  was replaced......  :-)

In passing, I later came across an article which said tests had shown 
that lightning had been found to go through brickwork, presumably 
under certain conditions.

If you enjoy horror stories try
alan cocks
Ubuntu user

More information about the ubuntu-uk mailing list